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

• Lunt 7.2 mm – 21.5mm Zoom Telescope Eyepiece
• Lunt flat-field eyepieces are coated with 0.1% anti-reflective coatings – the same coatings we use on our etalons!
• Use these eyepieces for nighttime as well as when viewing the Sun.
• 1.25″ barrel.

Zoom Telescope Eyepiece

General Features:

• Lunt flat-field zoom telescope eyepiece is coated with 0.1% anti-reflective coatings – the same coatings we use on our etalons!
• Use these eyepieces for nighttime as well as when viewing the Sun.
• 1.25″ barrel.

Lunt 7.2 mm – 21.5mm Telescope Eyepiece

• Focal length: 7.2 mm – 21.5 mm
• Barrel size: 1.25″
• Diameter: 47 mm
• Height: 82 mm
• Eye relief: 15 mm
• Lenses / Groups: 7 lenses / 4 Groups
• Field of View: 7.2 mm – 53° – 21.5 mm – 40°

Zoom Telescope Eyepiece

General Features:

• Lunt flat-field zoom telescope eyepiece is coated with 0.1% anti-reflective coatings – the same coatings we use on our etalons!
• Use these eyepieces for nighttime as well as when viewing the Sun.
• 1.25″ barrel.

Lunt 7.2 mm – 21.5mm Telescope Eyepiece

• Focal length: 7.2 mm – 21.5 mm
• Barrel size: 1.25″
• Diameter: 47 mm
• Height: 82 mm
• Eye relief: 15 mm
• Lenses / Groups: 7 lenses / 4 Groups
• Field of View: 7.2 mm – 53° – 21.5 mm – 40°

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 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

Protect your investment with this premium metal case designed specifically for the Lunt LS50THa solar telescope. Engineered from durable materials, it provides robust protection during transport and storage while maintaining easy access to your equipment. The sturdy construction safeguards your precision optics from dust, impact, and environmental elements, ensuring your solar observation instrument remains in optimal condition for years of reliable performance.