High-performance wide angle eyepieces for ultra clear astronomical viewing - 85° Apparent Angle of View

The PENTAX XW series 85° Apparent Angle combined with 20mm of Eye Relief produces some the widest and most relaxed viewing possible with your telescope. 

High-Grade Optics for Exceptional Image Quality

The high-performance XW-series optics incorporates high-refraction, extra-low-dispersion lanthanum glass elements to produce a well-balanced image with minimal aberrations. It is particularly designed to reduce the disturbing blackout effect by effectively compensating the spherical aberration of the pupil.

PENTAX-Original Multi-Layer Coating for Outstanding Light Transmission Efficiency

All lens surfaces that come in contact with air are treated with the original multi-layer coating, while all laminated surfaces are treated with the innovative partial coating, to offer the light transmission efficiency of more than 90 percent (an astonishing 96 percent at 550nm) over the visible light spectrum.

Advanced Light-Shielding Technology for Improved Image Contrast

Thanks to PENTAX’s advanced computer simulation technology, the XW series features a light-shielding diaphragm at the most effective position to drastically reduce internal reflections for a brighter, higher-contrast image.

Sleeve Size and Eyecup Design

The XW series provides a choice of two diameter to suit practically all telescope fousers: American-standard 31.7mm version (1.25"), and 50.8mm (2") version.

 When you remove the screw-on eyecup, it also provides a screw thread with a 43mm diameter and a 0.75 pitch

Specifications

High-performance wide angle eyepieces for ultra clear astronomical viewing - 85° Apparent Angle of View

The PENTAX XW series 85° Apparent Angle combined with 20mm of Eye Relief produces some the widest and most relaxed viewing possible with your telescope. 

High-Grade Optics for Exceptional Image Quality

The high-performance XW-series optics incorporates high-refraction, extra-low-dispersion lanthanum glass elements to produce a well-balanced image with minimal aberrations. It is particularly designed to reduce the disturbing blackout effect by effectively compensating the spherical aberration of the pupil.

PENTAX-Original Multi-Layer Coating for Outstanding Light Transmission Efficiency

All lens surfaces that come in contact with air are treated with the original multi-layer coating, while all laminated surfaces are treated with the innovative partial coating, to offer the light transmission efficiency of more than 90 percent (an astonishing 96 percent at 550nm) over the visible light spectrum.

Advanced Light-Shielding Technology for Improved Image Contrast

Thanks to PENTAX’s advanced computer simulation technology, the XW series features a light-shielding diaphragm at the most effective position to drastically reduce internal reflections for a brighter, higher-contrast image.

Sleeve Size and Eyecup Design

The XW series provides a choice of two diameter to suit practically all telescope fousers: American-standard 31.7mm version (1.25"), and 50.8mm (2") version.

 When you remove the screw-on eyecup, it also provides a screw thread with a 43mm diameter and a 0.75 pitch

Specifications

This wide-angle 14mm Nikon eyepiece combines a flat, wide field of view with a high eyepoint for easy viewing. The rubber eyecup and light-blocking hood make it easy to look through and block out ambient light, allowing you to enjoy astronomical observation in comfort.

Main Features

• With an apparent field of view of 72°, you can enjoy a wider actual field of view at the same magnification, allowing you to enjoy the impressiveness of outer space.
• Rather than focusing on numerical values, the eye relief is designed with performance as the priority, and the lens barrel is designed with ease of use in mind, ensuring a nearly constant distance from the end of the eyepiece to the eyepoint. Furthermore , exit pupil aberrations are effectively eliminated, minimizing blackout and coloration when the eye moves away from the eyepoint, improving usability.
• This advanced optical design combines a wide field of view with a flat image. It is compatible with the brightest F-numbers of the astronomical telescope objective optical system it is paired with. The NAV-14SW especially is compatible with optical systems up to f/4. It improves the peripheral image without compromising the central image, minimizing field curvature and astigmatism.
• To eliminate stray light that is harmful to observation, light-shielding diaphragms, light-shielding wires, and black paint are used in appropriate locations, and the lens surfaces are multi-coated to reduce harmful reflections and improve transmittance, among other measures.
• The mounting diameter is 31.7mm or 1.25", the standard "American size." It can be used with various telescopes. It also features a parfocal design, with the flange at the focal point. *Please make sure the eyepiece insertion diameter of your telescope is 31.7mm.
• The eyecup rubber that comes into direct contact with the skin is made of skin-friendly silicone rubber, and features an easy-to-grip knurled design reminiscent of Nikkor lenses.
• A silicone rubber light-shielding hood is used to prevent external light disturbances when observing at high magnifications where close contact is not possible, or in places such as parking lots. Unlike the usual "horn-shaped" hood, it has a unique shape that can be used by people who wear glasses, and is flexible enough to reduce the transmission of vibrations. It is detachable and can be removed when not needed. 
• Drip-proof construction with rubber sealing to prevent night dew from seeping in.
• The optional TSA-1 telescope attachment allows for digiscoping. The FSB series compact digital camera bracket allows for collimated photography. It can also be used for lunar and planetary photography, expanding the scope of your photography.
• The innovative eyepiece converter "EiC-16" (sold separately) enhances the performance of NAV-SW eyepieces. The "EiC-16" converts the magnification to 1.6x. Unlike conventional Barlow lenses, the optical design optimized for the NAV-SW series increases magnification without sacrificing sharpness in the centre, further improving image flatness. The mounting system is a 31.7mm/1.25" chuck with minimal decentering error.

Specifications

This wide-angle 10mm Nikon eyepiece combines a flat, wide field of view with a high eyepoint for easy viewing. The rubber eyecup and light-blocking hood make it easy to look through and block out ambient light, allowing you to enjoy astronomical observation in comfort.

Main Features

• With an apparent field of view of 72°, you can enjoy a wider actual field of view at the same magnification, allowing you to enjoy the impressiveness of outer space.
• Rather than focusing on numerical values, the eye relief is designed with performance as the priority, and the lens barrel is designed with ease of use in mind, ensuring a nearly constant distance from the end of the eyepiece to the eyepoint. Furthermore , exit pupil aberrations are effectively eliminated, minimizing blackout and coloration when the eye moves away from the eyepoint, improving usability.
• This advanced optical design combines a wide field of view with a flat image. It is compatible with the brightest F-numbers of the astronomical telescope objective optical system it is paired with. The NAV-10SW especially is compatible with optical systems up to f/4. It improves the peripheral image without compromising the central image, minimizing field curvature and astigmatism.
• To eliminate stray light that is harmful to observation, light-shielding diaphragms, light-shielding wires, and black paint are used in appropriate locations, and the lens surfaces are multi-coated to reduce harmful reflections and improve transmittance, among other measures.
• The mounting diameter is 31.7mm or 1.25", the standard "American size." It can be used with various telescopes. It also features a parfocal design, with the flange at the focal point. *Please make sure the eyepiece insertion diameter of your telescope is 31.7mm.
• The eyecup rubber that comes into direct contact with the skin is made of skin-friendly silicone rubber, and features an easy-to-grip knurled design reminiscent of Nikkor lenses.
• A silicone rubber light-shielding hood is used to prevent external light disturbances when observing at high magnifications where close contact is not possible, or in places such as parking lots. Unlike the usual "horn-shaped" hood, it has a unique shape that can be used by people who wear glasses, and is flexible enough to reduce the transmission of vibrations. It is detachable and can be removed when not needed. 
• Drip-proof construction with rubber sealing to prevent night dew from seeping in.
• The optional TSA-1 telescope attachment allows for digiscoping. The FSB series compact digital camera bracket allows for collimated photography. It can also be used for lunar and planetary photography, expanding the scope of your photography.
• The innovative eyepiece converter "EiC-16" (sold separately) enhances the performance of NAV-SW eyepieces. The "EiC-16" converts the magnification to 1.6x. Unlike conventional Barlow lenses, the optical design optimized for the NAV-SW series increases magnification without sacrificing sharpness in the centre, further improving image flatness. The mounting system is a 31.7mm/1.25" chuck with minimal decentering error.

Specifications

This wide-angle 7mm Nikon eyepiece combines a flat, wide field of view with a high eyepoint for easy viewing. The rubber eyecup and light-blocking hood make it easy to look through and block out ambient light, allowing you to enjoy astronomical observation in comfort.

Main Features

• With an apparent field of view of 72°, you can enjoy a wider actual field of view at the same magnification, allowing you to enjoy the impressiveness of outer space.
• Rather than focusing on numerical values, the eye relief is designed with performance as the priority, and the lens barrel is designed with ease of use in mind, ensuring a nearly constant distance from the end of the eyepiece to the eyepoint. Furthermore , exit pupil aberrations are effectively eliminated, minimizing blackout and coloration when the eye moves away from the eyepoint, improving usability.
• This advanced optical design combines a wide field of view with a flat image. It is compatible with the brightest F-numbers of the astronomical telescope objective optical system it is paired with. The NAV-7SW especially is compatible with optical systems up to f/4. It improves the peripheral image without compromising the central image, minimizing field curvature and astigmatism.
• To eliminate stray light that is harmful to observation, light-shielding diaphragms, light-shielding wires, and black paint are used in appropriate locations, and the lens surfaces are multi-coated to reduce harmful reflections and improve transmittance, among other measures.
• The mounting diameter is 31.7mm or 1.25", the standard "American size." It can be used with various telescopes. It also features a parfocal design, with the flange at the focal point. *Please make sure the eyepiece insertion diameter of your telescope is 31.7mm.
• The eyecup rubber that comes into direct contact with the skin is made of skin-friendly silicone rubber, and features an easy-to-grip knurled design reminiscent of Nikkor lenses.
• A silicone rubber light-shielding hood is used to prevent external light disturbances when observing at high magnifications where close contact is not possible, or in places such as parking lots. Unlike the usual "horn-shaped" hood, it has a unique shape that can be used by people who wear glasses, and is flexible enough to reduce the transmission of vibrations. It is detachable and can be removed when not needed. 
• Drip-proof construction with rubber sealing to prevent night dew from seeping in.
• The optional TSA-1 telescope attachment allows for digiscoping. The FSB series compact digital camera bracket allows for collimated photography. It can also be used for lunar and planetary photography, expanding the scope of your photography.
• The innovative eyepiece converter "EiC-16" (sold separately) enhances the performance of NAV-SW eyepieces. The "EiC-16" converts the magnification to 1.6x. Unlike conventional Barlow lenses, the optical design optimized for the NAV-SW series increases magnification without sacrificing sharpness in the centre, further improving image flatness. The mounting system is a 31.7mm/1.25" chuck with minimal decentering error.

Specifications

Have you ever observed the night sky with astronomy binoculars?

These affordable Acuter binoculars offer a large 80mm aperture optics for collecting the fine details of star cluster, nebulae and even distant galaxies millions of light years away. 

Away from city lights under a dark sky, you'll never forget the experience of scanning the star clouds and dust lanes in our home galaxy, the Milky Way.

They mount on any photographic tripod to ensure steady viewing for extended periods. An adjustable balance point positions them perfectly. 

While ideal for astronomy, their high magnification also makes them a great choice for whale watching from the shoreline, wildlife viewing or taking in distant views. 

Details:

• Aperture: 80mm
• Magnification: 20x
• Case included: Yes
• Tripod Mount: Standard .25" photographic

This wide-angle 5mm Nikon eyepiece combines a flat, wide field of view with a high eyepoint for easy viewing. The rubber eyecup and light-blocking hood make it easy to look through and block out ambient light, allowing you to enjoy astronomical observation in comfort.

Main Features

• With an apparent field of view of 72°, you can enjoy a wider actual field of view at the same magnification, allowing you to enjoy the impressiveness of outer space.
• Rather than focusing on numerical values, the eye relief is designed with performance as the priority, and the lens barrel is designed with ease of use in mind, ensuring a nearly constant distance from the end of the eyepiece to the eyepoint. Furthermore , exit pupil aberrations are effectively eliminated, minimizing blackout and coloration when the eye moves away from the eyepoint, improving usability.
• This advanced optical design combines a wide field of view with a flat image. It is compatible with the brightest F-numbers of the astronomical telescope objective optical system it is paired with. The NAV-5SW in particular is compatible with optical systems up to f/4. It improves the peripheral image without compromising the central image, minimizing field curvature and astigmatism.
• To eliminate stray light that is harmful to observation, light-shielding diaphragms, light-shielding wires, and black paint are used in appropriate locations, and the lens surfaces are multi-coated to reduce harmful reflections and improve transmittance, among other measures.
• The mounting diameter is 31.7mm or 1.25", the standard "American size." It can be used with various telescopes. It also features a parfocal design, with the flange at the focal point. *Please make sure the eyepiece insertion diameter of your telescope is 31.7mm.
• The eyecup rubber that comes into direct contact with the skin is made of skin-friendly silicone rubber, and features an easy-to-grip knurled design reminiscent of Nikkor lenses.
• A silicone rubber light-shielding hood is used to prevent external light disturbances when observing at high magnifications where close contact is not possible, or in places such as parking lots. Unlike the usual "horn-shaped" hood, it has a unique shape that can be used by people who wear glasses, and is flexible enough to reduce the transmission of vibrations. It is detachable and can be removed when not needed. 
• Drip-proof construction with rubber sealing to prevent night dew from seeping in.
• The optional TSA-1 telescope attachment allows for digiscoping. The FSB series compact digital camera bracket allows for collimated photography. It can also be used for lunar and planetary photography, expanding the scope of your photography.
• The innovative eyepiece converter "EiC-16" (sold separately) enhances the performance of NAV-SW eyepieces. The "EiC-16" converts the magnification to 1.6x. Unlike conventional Barlow lenses, the optical design optimized for the NAV-SW series increases magnification without sacrificing sharpness in the centre, further improving image flatness.
• The mounting system is a 31.7mm/1.25" chuck with minimal decentering error.

Specifications

Pictured Telescope is a prototype. (binoviewer not included)

• The APO140FL F/9.6 features an air-spaced apochromatic-doublet objective with a Fluorite (CaF2) rear element that results in a lighter objective.
• The objective weighs about 2.5 lbs., compared to 5 lbs. for the APO140FL F/7 version, allowing it to come to temperature more quickly.
• Starting 2025, the objective includes anti-reflective and hydrophobic coatings for easier cleaning and maintenance.
• Housed in an aluminum cell, it provides excellent thermoregulation while remaining lightweight and strong.
• The optical assembly is inside a lightweight aluminum tube with sharp-edged baffles.
• No collimation is needed after the scope leaves TEC.
• Comes equipped with a Starlight Instruments FTF#2545 Feather Touch Focuser with coarse and fine 9:1 planetary reduction.
• The 2" locking metal collet is temperature-insensitive and holds loads with precision and concentricity.

In classic refractor fashion, the TEC APO140FL F/9.6 is a no-compromise, no-frills design that lets the wonders of nature speak for themselves.

Recommended Accessories;

• Precision adjustable Tube Rings
• 9” Dovetail Plate and Carry Handle facilitate easy transportation and fit seamlessly with most mounts.
• Focal Reducer Corrector converts the F/7 Ratio to F/6.2 with a 115mm back focus.
• TEC Transportation Case that eases transport between observation locations.
• TEC Compact Case for easy lifting and transportation.
• 7×50 Vixen Finderscope with a TEC Finder Bracket and Base for Telescope mounting.
  

Testing and Quality Assurance

TEC Telescopes go through rigorous testing to ensure top quality performance. Newtonian Rings are used throughout the glass production process and TEC then use an interferometer to correct any remaining imperfections. Every telescope is then tested vigorously to reach the most optimum Strehl ratio possible. Rest assured that your telescope has been optimized to be as optically perfect as possible. If the objective does not reach TEC's expectations, the telescope will not be shipped. As a strict policy, TEC will not release telescope test reports.

While the objectives are fine-tuned under interferometrical control to meet the highest optical standards, cosmetic imperfections may exist in the objective and the tube assembly. Please rest assured that any imperfection in the telescope has been determined not to affect the optical performance.

Specifications

Heavy duty holder, ideal for attaching binoculars to a standard photographic tripod for extended and relaxed viewing sessions.

• Designed to securely hold binoculars
• Universal 1/4'' thread attachment
• Possibility to be attached to a tripod head or fluid head
• Clamp range round tube: 13-55mm

This Binocular Super Clamp can hold up to 15kg and is well suited to binoculars without a universal centre mounting connector. It features a solid mechanism that means your binoculars will stay firmly attached to your tripod. 

The ultra-wide 102° field of view of the Nikon NAV-17HW makes you feel like you've jumped into outer space. It also comes with a converter that provides the performance of two eyepieces.

This 17mm focal length, 2" diameter Nikon eyepiece is a stepping stone to an unparalleled dimension, perfect for astronomy enthusiasts who demand optical performance.

Ultra-wide 102° field of view

The 102° apparent field of view is so overwhelmingly wide that you can't see the entire expanse of space in front of you at a glance. Experience the dramatic impact of this 102° apparent field of view, which will make you forget you're even looking through an eyepiece. Experience the ultra-wide field of view, which even at 100x magnification, can fit the Moon's disk in its entirety.

Advanced aberration correction

This advanced optical design combines a wide field of view with flatness of the image. It is fully compatible with the bright F-number (f/4) of the objective optical system it is paired with. Furthermore, the central image remains sharp while field curvature and astigmatism are minimized to the utmost, allowing you to fully experience the benefits of a wide field of view with sharp star images all the way to the corners of the field.

Includes the Eyepiece Innovative Converter "EiC" as standard, giving you the value of two for the price of one

The dedicated converter "EiC-H14 (for NAV-17HW)" is included as standard. Simply screw it onto the end of the barrel to increase the focal length to 10mm, improving magnification and effectively correcting aberrations (field curvature and astigmatism). It truly has the performance of two high-performance eyepieces.

Keep stray light away

To minimize stray light that is harmful to observation, optical simulations were conducted, taking into account even large angles of incidence. Light-blocking apertures, light-blocking lines, black paint, etc. were used appropriately. Multi-coating was applied to the lens surfaces, suppressing harmful reflections and improving contrast.

Detachable light-shielding hood

A light-shielding hood is used to prevent external light disturbances when observing at high magnifications where it is not possible to keep the eye close to the object, or in places such as parking lots. It is detachable and can be removed when not needed. Unlike regular "horn-shaped eyecups," it has a unique shape that allows observation while wearing glasses, and is flexible enough to reduce the transmission of vibrations.

Specifications

Notes

• *¹ Apparent field of view = Actual field of view × magnification
• *² The outer diameter of the metal lens barrel with the rubber knurling removed

The ultra-wide 102° field of view of the Nikon NAV-12.5HW makes you feel like you've jumped into outer space. It also comes with a converter that provides the performance of two eyepieces.

This 12.5mm focal length, 2" diameter Nikon eyepiece is a stepping stone to an unparalleled dimension, perfect for astronomy enthusiasts who demand optical performance.

Ultra-wide 102° field of view

The 102° apparent field of view is so overwhelmingly wide that you can't see the entire expanse of space in front of you at a glance. Experience the dramatic impact of this 102° apparent field of view, which will make you forget you're even looking through an eyepiece. Experience the ultra-wide field of view, which even at 100x magnification, can fit the Moon's disk in its entirety.

Advanced aberration correction

This advanced optical design combines a wide field of view with flatness of the image. It is fully compatible with the bright F-number (f/4) of the objective optical system it is paired with. Furthermore, the central image remains sharp while field curvature and astigmatism are minimized to the utmost, allowing you to fully experience the benefits of a wide field of view with sharp star images all the way to the corners of the field.

Includes the Eyepiece Innovative Converter "EiC" as standard, giving you the value of two for the price of one

The EiC-H10 dedicated converter is included as standard. Simply screw it onto the end of the barrel to increase the focal length to 10mm, improving magnification and effectively correcting aberrations (field curvature and astigmatism). It truly has the performance of two high-performance eyepieces.

Keep stray light away

To minimize stray light that is harmful to observation, optical simulations were conducted, taking into account even large angles of incidence. Light-blocking apertures, light-blocking lines, black paint, etc. were used appropriately. Multi-coating was applied to the lens surfaces, suppressing harmful reflections and improving contrast.

Detachable light-shielding hood

A light-shielding hood is used to prevent external light disturbances when observing at high magnifications where it is not possible to keep the eye close to the object, or in places such as parking lots. It is detachable and can be removed when not needed. Unlike regular "horn-shaped eyecups," it has a unique shape that allows observation while wearing glasses, and is flexible enough to reduce the transmission of vibrations.

Specifications

Notes

• *¹ Apparent field of view = Actual field of view × magnification
• *² The outer diameter of the metal lens barrel with the rubber knurling removed

If you'd like to enhance your astronomy experience with some colour planetary filters, why not go for the saxon 2" Colour Planetary Filter Set?

The saxon 2" Colour Planetary Filter Set comes with four filters -- Red, Yellow, Blue and Neutral Density.

Need some colour planetary filters to enhance your viewing experience?

Why not get a set of four with the saxon 1.25" Colour Planetary Filter Set?

The saxon 1.25" Colour Planetary Filter Set is a great addition for lunar and planetary observing. They help increase image contrast and resolution on the Moon and planets as well as reduce glare from the full or near-full Moon.

The set comes in four colours of Yellow (#12), Red (#23A), Neutral Density (#96ND) and Blue (#80A). 

• 25th Anniversary Edition Tabletop Dobsonian GOTO with Wi-Fi
• Controlled with SynScan Pro App for iOS and Android
• GOTO via SynScan free app
• DC12V voltage
• Freedom Find dual encoder technology

Celebrate a quarter-century of astronomical excellence with the Sky-Watcher 25th Anniversary 127 Maksutov Virtuoso GTi Tabletop Dobsonian! This special edition telescope combines the compact power of a 127mm Maksutov-Cassegrain optical system with the smart, user-friendly features of the Virtuoso GTi mount. Perfect for both newcomers and seasoned stargazers, this model offers a luxurious, precise, and enjoyable way to explore the cosmos, marking Sky-Watcher’s commitment to innovation and quality over the years.

25th Anniversary Edition 127 VIRTUOSO GTi Maksutov-Cassegrain Tabletop Dobsonian

• 25th Anniversary Edition Tabletop Dobsonian GOTO with Wi-Fi
• Controlled with SynScan Pro App for iOS and Android
• GOTO via SynScan free app
• DC12V voltage
• Freedom Find dual encoder technology

The Sky-Watcher VIRTUOSO GTi 127/1500 Maksutov-Cassegrain Tabletop Dobsonian is a fully automatic telescope ideal for beginners and those who want to get straight to observing. Aligning the mount takes mere minutes with the “Bright Object” alignment mode, and the computerised SynScan system is the ultimate upgrade that allows automatic pointing and tracking of more than 42,000 object in the sky! This means less time spent finding a faint nebula or a distant planet and more time to enjoy observing. Astronomy has never been so easy!

The Maksutov-Cassegrain is a compact and powerful optical design that combines a front meniscus lens and two mirrors. The optical tube is closed by the front meniscus, keeping the mirrors protected from atmospheric agents such as humidity, dust and pollution. The tube is short but the focal length is long allowing high magnification with the standard eyepieces. With maximum practical magnification of 256x , this Sky-Watcher Telescope will reveal details in Saturn’s rings, Jupiter’s bands, the Martian polar ice caps, and the phases of Venus and the moon.

The VIRTUOSO GTi Dobsonian Mount – Wi-Fi-controllable with iOS and Android and compatible with syncs hand controller, allowing it for smooth tracking and alignment. Use Wi-Fi to control the telescope wirelessly with your mobile device; smartphone or tablet.

Die-cast and machined metal. Perfect for adding distance between scope and tripod on iOptron CEM26/HEM27/GEM28/HAE29 mounts.

Height: 5.5"
Diameter: 4" (100 mm)
Weight: 1lb 9oz
Gross weight and dimension: 2.5 lbs, 9 x 6 x 6 in

Option:

To convert the top center stud to 3/8" threaded bolt for uses with

• Sky-Tracker-Pro (3322s),
• Sky-Guider-Pro (3550s), and
• Sky-Hunter (3700xx),
• HAZ31, HAZ46

The Lunt LS50C Front Mount 50mm Double Stack represents a significant upgrade for LS50 users seeking enhanced solar observation capabilities. This precision optical system delivers exceptional H-alpha contrast and detail, revealing intricate chromospheric features with remarkable clarity. The double stack configuration dramatically reduces bandwidth, enabling observation of fine prominences, filaments, and surface details that single-stack systems simply cannot resolve. Built to Lunt's exacting standards, this front-mounted design integrates seamlessly with your existing LS50 setup, providing professional-grade performance for serious solar astronomers and experienced observers.

Because the LS50C Solar Filter has an estimated bandpass of <0.70 Angstrom it is capable of providing high contrast views of both surface and edge detail. Significantly, adding an additional etalon system (double-stacking) will reduce the bandpass to ~<0.50. Allowing for higher resolution viewing and/or imaging.

The LS50C is easy to install, simply Screw it on to the front of your 50mm Lunt solar scope, and you are ready to observe the Sun in far greater contrast than before.

Note: Only compatible with the 50mm Lunt Solar Telescope

The Lunt Solar Systems Pressure Tuner Controller, or PC-USB, is a microprocessor controlled, remote operable* , pressure control system that can be retrofitted to any Lunt PT product without return to the Lunt facility. A simple 1/8″ airline connects the PC-USB to the Solar Telescope and can be installed at any length.

The PC-USB is a simple 2 button system. One button for increasing and one button for decreasing the PT pressure. Digital feedback and indicator lights are provided.

The PC-USB can run continuously on internal battery power for more than 12 hours. It has external power input (12-15 VDC) (120/240 VAC to 12 V adapter) that can power the unit and charge the internal batteries simultaneously.

All existing PT systems can be retrofitted via an adapter to the pressure tuner knob. Or, future PT units can be specified with a quick disconnect at the PT input, removing the PT knob from the telescope altogether.

Upon power up the PC-USB will go thru a systems vent and ambient pressure set mode. It can be factory or user programmed to center wavelength setpoint. Due to the sealed nature of the system, the center wavelength setpoint will remain constant at any altitude at a given set pressure point.

The Pressure Tuner Controller is accurate to 0.3 PSI, providing very precise control of the pressure setpoint. It will auto-compensate for fluctuations in internal pressure changes due to significant changes in temperature. Because the PC-USB can provide closed-loop feedback of internal etalon pressure, users can correlate change in pressure to doppler shifted events.

Contact us if you need additional hose length.

* USB Cables for remote usage not included

The Calcium K (Ca-K) module is designed for observing the Sun in the 393.4 nm wavelength, one of the two emission lines produced by Calcium near the edge of the visible spectrum. This line originates from a slightly lower and cooler layer of the solar atmosphere than that observed in Hydrogen-alpha, revealing supergranulation cells and bright regions associated with strong magnetic activity such as sunspots and active regions.

Observing both the Calcium K and Hydrogen-alpha wavelengths provides a deeper understanding of the Sun’s structure, magnetic field strength, and the dynamics of its active regions.

This Calcium K Module is engineered exclusively for the Lunt LS130MT Universal Telescope, integrating seamlessly with its modular design. It allows the LS130MT to be configured for Ca-K solar observing or imaging with optimal performance.

The Ca-K line at 393.4 nm lies just beyond the visible spectrum on the ultraviolet side. While many observers can perceive a faint violet hue, others may find the contrast difficult to discern due to natural eye limitations. For this reason, Calcium K is most effectively studied through imaging — modern cameras capture the fine structure and intricate detail of the Sun in this wavelength with remarkable clarity.

The Lunt Ca-K Module for LS130MT includes internal narrowband filters with a <2.4 Å bandpass, delivering crisp, high-contrast solar images. This is primarily an imaging system, though experienced observers or those with enhanced UV sensitivity (such as post-cataract surgery) may enjoy limited visual observation.

The Lunt Front Mount 40mm Double Stack represents a significant upgrade for LS40 users seeking enhanced solar observation capabilities. This precision optical system delivers exceptional H-alpha contrast and detail, revealing intricate chromospheric features with remarkable clarity. The double stack configuration dramatically reduces bandwidth, enabling observation of fine prominences, filaments, and surface details that single-stack systems simply cannot resolve. Built to Lunt's exacting standards, this front-mounted design integrates seamlessly with your existing LS40 setup, providing professional-grade performance for serious solar astronomers and experienced observers.

Because the LS40FHa Solar Filter has an estimated bandpass of <0.70 Angstrom it is capable of providing high contrast views of both surface and edge detail. Significantly, adding an additional etalon system (double-stacking) will reduce the bandpass to ~<0.50. Allowing for higher resolution viewing and/or imaging. In addition, the part number LS40FHa is offered for this purpose or for those who already have a Lunt blocking filter.

LS40FHa Specifications: (single filter)

• Optical Aperture: 40 mm
• Etalon: <0.70 Angstrom
• Tuning: Tilt
• Focal Length: 400mm
• Filter Storage: Aluminum finished hard case with fitted foam
• Filter Weight: 0.4kg

Note: Only compatible with the 40mm Lunt Solar Telescopes

Double stacking provides a truly enhanced, high definition view of the Sun’s surface details. Notably, it lowers the bandpass of the system from <0.65 Angstroms to <0.45 Angstroms. This will significantly make the surface features on the Sun "pop"!

The Lunt 130 mm and 152 mm telescopes can be internally double-stacked at the time of purchase or anytime thereafter. Furthermore, neither telescope module will need to be returned to the factory for double-stacking.

You can purchase the 130 mm or 152 mm single stack telescope initially and add the LFPT to make it a double stack unit later. This will make it more affordable to purchase our a new universal telescope and still have room for upgrades. Once you upgrade your Lunt Universal Telescope with the double stack unit, you will be able to see the finer details not previously visible.

Double stacking provides a truly enhanced, high definition view of the Sun’s surface details. Notably, it lowers the bandpass of the system from <0.7 Angstrom to <0.5 Angstrom, which really makes the surface “pop”!

The Lunt 80 mm and 100mm Universal Telescopes can be internally double-stacked at the time of purchase or anytime thereafter. Furthermore, neither telescope module will need to be returned to the factory for double-stacking.

You can purchase the 80 mm or 100 mm single stack universal telescope initially and add the SFPT to make it a double stack unit later. This will make it more affordable to purchase our a new universal telescope and still have room for upgrades. Once you upgrade your Lunt Universal Telescope with the double stack unit, you will be able to see the finer details not previously visible.

The Lunt LS50FHa Front Mount 60mm Double Stack represents a significant upgrade for LS60 users seeking enhanced solar observation capabilities. This precision optical system delivers exceptional H-alpha contrast and detail, revealing intricate chromospheric features with remarkable clarity. The double stack configuration dramatically reduces bandwidth, enabling observation of fine prominences, filaments, and surface details that single-stack systems simply cannot resolve. Built to Lunt's exacting standards, this front-mounted design integrates seamlessly with your existing LS60 setup, providing professional-grade performance for serious solar astronomers and experienced observers.

Because the LS60FHa H-Alpha Filter has an estimated bandpass of <0.70 Angstrom, it is capable of providing high contrast views of both surface and edge detail. Adding an additional etalon system (double-stacking) will reduce the bandpass to ~<0.50 (dependent upon scope) allowing for higher resolution viewing and/or imaging. An LS60FHa H-Alpha Filter without blocking filter is offered for this purpose or for those who already have a Lunt blocking filter. A Lunt blocking filter must be used with Lunt Ha filters at all times.

LS60FHa Specifications: (single filter)

• Optical Aperture: 60 mm
• Etalon: Internal <0.70 Angstrom
• Tuning: Tilt
• Focal Length: Customer Telescope
• Storage: Aluminum finished hard case with fitted foam
• Weight: 1.5kg

Note: Only compatible with the 60mm Lunt Solar Telescopes

The Lunt LS50FHa Front Mount 50mm Double Stack represents a significant upgrade for LS60 users seeking enhanced solar observation capabilities. This precision optical system delivers exceptional H-alpha contrast and detail, revealing intricate chromospheric features with remarkable clarity. The double stack configuration dramatically reduces bandwidth, enabling observation of fine prominences, filaments, and surface details that single-stack systems simply cannot resolve. Built to Lunt's exacting standards, this front-mounted design integrates seamlessly with your existing LS60 setup, providing professional-grade performance for serious solar astronomers and experienced observers.

Because the LS50FHa Solar Filter has an estimated bandpass of <0.70 Angstrom it is capable of providing high contrast views of both surface and edge detail. Significantly, adding an additional etalon system (double-stacking) will reduce the bandpass to ~<0.50. Allowing for higher resolution viewing and/or imaging. In addition, the part number LS50FHa is offered for this purpose or for those who already have a Lunt blocking filter.

LS50FHa Specifications: (single filter)

• Optical Aperture: 50 mm
• Etalon: <0.70 Angstrom
• Tuning: Tilt
  
• Filter Storage: Aluminum finished hard case with fitted foam
• Filter Weight: 2 lb (~1kg)

Note: Only compatible with the 60mm Lunt Solar Telescopes

The Lunt 230mm Dedicated Solar Telescope delivers unparalleled optical performance across the full magnification range, featuring a double-etalon Hydrogen-alpha system combined with advanced high-contrast coatings and the proprietary Doppler True Pressure Tuning system. This massive, high-performance instrument creates a striking three-dimensional viewing experience, particularly highlighting fine structures in solar filaments and active regions across the disk. Designed for advanced observers and serious solar imagers, the 230mm excels in both visual observation and high-end digital imaging, producing bright, sharp solar views with exceptional clarity and contrast.

Lunt Dedicated Solar Telescopes deliver professional-grade solar observation in instruments designed specifically for the Sun. These scopes reveal chromospheric details with remarkable clarity, capturing prominences, filaments, and surface features that cannot be seen with standard white light filters. Compact, precise, and optically excellent, they offer an immersive solar observing experience for both beginners and experienced enthusiasts.

Blocking Filter: B3400 Internal Mount

Bandwidth: <.5 Angstroms at 656.28nm

Focuser: Feather Touch

Etalon 1: Internal Un-obstructed 80mm, Pressure Tuned

Etalon 2: Internal Un-Obstructed 80mm, Pressure Tuned

The VENGEANCE ED 10x50 binoculars are designed for those who need both serious light transmission and and distant viewings. With the highest magnification in the ZeroTech range and 50mm objective lenses and ED glass, these binoculars offer sharp viewing beyond the range of lower powered binoculars. 

ED glass ensures razor-sharp, distortion-free visuals, while a rugged waterproof and fog-proof chassis guarantees reliability no matter where you’re headed. It’s the most powerful VENGEANCE ED model—and one of the best-value high-powered binos on the market today.

Highlights

• 10x20 Magnification – Detail and power for long-range tracking
• ED Glass – Razor-sharp resolution and colour correction
• Large 50mm Objective Lenses – Optimised for dawn, dusk, and heavy overcast
• Rugged & Weatherproof – Built for tough terrain and foul weather
• Fast-Focus Control – Easy, accurate adjustments on the fly
• All-Weather Rubber Armour – Non-slip and impact-resistant
• Unconditional Lifetime Warranty – No questions asked!

These binoculars are fully waterproof, fog-proof, and wrapped in rubber armour that absorbs shock and ensures a secure grip in any conditions. Whether outside enjoying nature before sunrise or glimpsing birds at sunset, the 12x50’s optical design ensures your view stays bright, clear, and colour-true.

Specifications

The VENGEANCE ED 10x50 binoculars are designed for those who demand serious light transmission and optical sharpness in low-light environments. With large 50mm objective lenses and ED glass, these binoculars soak in ambient light—delivering ultra-bright, ultra-clear visuals during the critical early and late hours.

Combining long-range power with high-definition clarity, this model offers the most complete viewing experience for bird watching, nature viewers and are well suited for a night out under the stars observing the night sky above us. 

Highlights

• 10x50 Magnification – Detail and power for long-range tracking
• ED Glass – Razor-sharp resolution and colour correction
• Large 50mm Objective Lenses – Optimised for dawn, dusk, and heavy overcast
• Rugged & Weatherproof – Built for tough terrain and foul weather
• Fast-Focus Control – Easy, accurate adjustments on the fly
• All-Weather Rubber Armour – Non-slip and impact-resistant
• Unconditional Lifetime Warranty – No questions asked!

These binoculars are fully waterproof, fog-proof, and wrapped in rubber armour that absorbs shock and ensures a secure grip in any conditions. Whether outside enjoying nature before sunrise or glimpsing birds at sunset, the 10x50’s optical design ensures your view stays bright, clear, and colour-true.

Specifications

The VENGEANCE HD 8x42 is the wide-field optic built for outdoor explorers. With advanced High Definition (HD) glass and high-transmission coatings, these binoculars deliver vivid colour, razor-sharp clarity, and exceptional contrast—even at long distances and in poor light.

Designed for tough environments, they combine superior optics with full waterproofing, fog-proof construction, and durable rubber armour. 

Highlights

• 8x42 Magnification – Long-range reach with crisp, stabilised image resolution
• High Definition (HD) Glass – Reduces colour distortion for sharp, true-to-life visuals
• Dielectric-Coated Bak-4 Prisms – Optimises brightness and contrast in any light
• Fully Waterproof & Fog-Proof – Weather-sealed for performance in any condition
• Fully Broadband Multi-Coated Lenses – High light transmission for detail-rich images
• Rugged Rubber Armor – Built for impact resistance and all-day comfort
• Fast-Focus System – Responsive, precise focus control for moving targets
• Unconditional Lifetime Warranty – Backed for life by ZeroTech

Overview

Engineered for medium to long-range viewing in real-world conditions, the VENGEANCE HD 10x42 Binoculars give you precision optics without the premium price.  The well-balanced 8x magnification and 42mm objective lenses offer a wide, steady field of view, handy to help spot wildlife, bird watching or scenery viewing. Ideal for a night under the stars looking up the Universe too!

At the core is advanced High Definition (HD) glass that corrects chromatic aberration, resulting in ultra-sharp, colour-true visuals. Dielectric-coated Bak-4 prisms and fully multi-coated lenses work together to maximise light transmission, delivering high-definition detail even at dawn, dusk, or in shaded environments.

Rugged and suited to Australian conditions, the 8x42 HD is fully waterproof, fog-proof, and wrapped in grippy rubber armour that protects against drops and harsh use. 

If you’ve been comparing high-end optics and debating the spend, the VENGEANCE HD 8x42 offers a smarter alternative.

Specifications