Sky-Watcher Evostar ED72 refractors provide the finest images obtainable in their design class. These doublet refractors deliver dramatic, coal-black skies and faithful, contrast-rich views of planetary and deep-space phenomenon that are second to none. Sky-Watcher Evostar refractors are the logical choice for the discriminating amateur astronomer looking for an investment in advanced instrumentation for exceptional viewing and astrophotography, the focus position is designed for use with a camera.

This telescope is designed to be used as an astrograph, it short focal length make it ideal for imaging large star fields without the need for a large astronomical mount. However, we suggest the Skywatcher 0.85x Reducer / Corrector to flatten the wide field for better imaging results

It is also a perfect scope for Autoguiding with the addition of the ZWO ASI 120Mini Guider camera

FEATURES:

The Sky-Watcher family of EvoStar ED telescopes started with the 80ED, a value for money favourite of astronomers all over the world.

The new Sky-Watcher Evolux 82ED refractor is perfect for those looking for a compact and ultra-transportable instrument ideal for Wide Field, Deepsky astrophotography.

An optional custom designed 0.90X reducer/ flattener is available as an option.

It flattens the field for pinpoint stars right out to the edges, whilst reducing the focal length to 480mm

The new EVOLUX 82ED continues this tradition with major enhancements including:

• Unparalleled levels of optic performance for an ED telescope
• Updated 2-lens element design
• New ED glass
• 82mm / f 6.4 (f5.8 with optional reducer)
• New optional re-designed dedicated reducer/field flattener for wider field of view and faster imaging
• Retractable integrated dewshield for improved handling
• Precision 61mm (2.4″) dual-speed focuser

Here's a great mount option:

Specifications:

• Focal length=530mm / f = 6.4
• Focal length = 480mm / f=5.8 with optional dedicated reducer/flattener for wider field of view
• Net Weight: 2.6kg
• Retractable dewshield for compact handling and storage
• High precision new 61mm (2.4″) dual-speed focuser
• Aluminium hard case
• V style Dovetail

New from Sky-Watcher - the smallest member of their Esprit range of APO triplet refractors

The Sky-Watcher 70mm Esprit 70EDX Triplet APO Refractor is a professional instrument for the most demanding and exacting astrophotographers. The air spaced apochromatic triplet lenses have exceptional colour correction over the entire visible spectrum there is no chromatic aberration even on bright objects! Knife edge baffles reduce internal reflections and increase contrast, helping to bring out faint structure in deep sky objects.

Main Features:

• Air Spaced 70mm Apochromatic Triplet
• 490mm Focal Length
• Fully multi coated lenses
• Optional 0.92x Reducer Available

In The Box:

• 70/490 Apochromatic Refractor
• Retractable Dew Shield
• D Style dovetail Bar and rings w/handle
• Aluminium Foam-Lined Case

Specifications:

The ZWO FF80 APO is a refractive astrograph with a powerful flatfield optical design which saves you from the expensive cost of a field flattener. It eliminates the trouble of calculating the back focus distance of the flattener and connecting various accessories to achieve that distance. You can just connect any possible accessories you need. As long as the target is focused, the whole optical system is perfect for imaging. This makes the whole setting up process much more convenient, and saves you time, allowing you to pay more attention to the image shooting itself.

The ZWO FF80 APO is also a nice choice for your visual observation. It fits diagonals as well as various eyepieces and can achieve a perfect focus, and can even be used to observe planets with a super-high magnification eyepiece.

The whole design of the telescope is compact and lightweight. The OTA weighs only 3.9kg, and the full package with tube rings and other accessories weighs 4.7kg. It has an aperture of 80mm. The focal ratio is f/7.5 and the focal length is 600mm.

The ZWO FF80 APO adopts a 3+1 quadruplet lens structure which contains two pieces of ED glass that can effectively reduce chromatic aberration and enhance clarity and sharpness. It supports the full-frame imaging circle and has a fine spot diagram with tiny distortions of the peripheral stars. The 3" rigid focuser comes with a new-type 360°rotator with scales and a finder base. M76, M68, M54, and M48 camera adapters are also attached, and the M48 adapter has a 2” female thread for installing filters.

ZWO FF80 APO Main Features

Quadruplet air-spaced APO design - No need to calculate back focus

Small and round stars - with a central RMS radius of 3um

Various adapters - M76/ M68/ M54/ M48

Dual speed (1:10) focuser - Support both fine and coarse adjustment

No need for a separate field flattener - Self-flattening design

Supports full-frame cameras - Produces a 44mm image circle

Focal reducer -

Specifications

SKU: ZWO-FF80-APO

Designed in Japan, Made in Taiwan 

Sharp Optical System & Performance

• Superb ED class for remarkable image clarity. Crystal clear, superb sharp, almost zero aberration and distortion.
• 2 ED Glasses S-FPL 53 & S-FPL 51 & Lanthanum - Fully Separated Triplet (FST)  
  Fully Multi-coated optics ensures maximum light transmission
• Impressive user experience, designed for both visual observation and astrophotography

Precision focusing & mechanical design throughout

• Finely CNC machining aluminium body and patented rack and pinion focuser for heavy loading 360 degree rotatable for photography
• Deluxe high-glossy anodizing finish
• Retractable sunshade
• PATENTED：US 8,693,092 B2 / Taiwan 1417570
  

Design

At the heart of the Founder Optics FOT86 is premium performance 3-element ED APO triplet refractor, designed by a famous optical designer in based in Japan. The optical performance is impressive as a two ED glass elements are employed.

Unlike most ED triplet telescopes which use only 1 ED glass element, Founder Optics adopted 2 ED glass of S-FPL 53 and S-FPL 51 to bring a remarkable image that you'll immediately spot with even a casual viewing. With two fluoro-crown ED glass elements and fully multi-coated optics, these Founder Optics refractors provide a crystal clear, superb sharp, zero aberration and distortion image to your eyes or camera sensor.

In addition, each element is fully separated or air spaced which is not common even among APO triplet telescopes. This offers further improvements to the already impressive optical quality. 

Quality

In order to complete this unique design, it requires a very high level machining and assembly capability. Founder Optics partner with an experienced factory located in Taiwan with over 50 years experience in precision manufacturing, especially for Japanese companies. 

Besides manufacturing know-how, the high standard of quality control is also crucial to producing FOT86 and FOT106 telescopes. This is recorded in a Quality Certification Card.

Every unit is thoroughly tested, and these unique records help customers understand the quality of their telescope. Founder Optics take their quality checking very seriously as they aim to offer the best triplet APO telescopes to BINTEL customers. 

Focuser - 2'' Rack & Pinion

Perfect Hybrid Drive system with 8 Ball bearings- More Smoothly!

2sets of 4pcs ball bearing at 2 sides between the drawtube and the focuser handle linear travel of the focuser. Once the locked the knob, there is no gap among the drawtube, 8pcs ball bearings, and the focuser cover. It does not only keep the focuser always paralleled the optic axis, but also keep it moved very smoothly.

Dual Speed Focuser- 1:11 – Extremely Accurate!

Smooth focus motion and fine focus wheel allow precision adjustment from critical focusing of eyepiece or camera.

Unique Lock Function–  Heavy Loading Capability!

Special lock grabs the rack& pinion & drawtube in two directions. The design makes the focuser always paralleled the optics axis. Instead of pushing against the drawtube to eliminate focus shift while it’s focused. And it can handle up to 8kg as well for complex imaging trains.

Longer Traveling Distance– Suitable for a range of Photographing Accessories!

Unlike other focusers, the long travel 95mm provides more room for adjust for fine and accurate focus.  

It is compatibly for a wide range of photographic accessories, along with easy to use controls.  

Solid, lockable Dew Shield

Built in sliding dew shield.  Three screws hold dew shield stable while imaging or observing while keeping it place during transport. 

Specifications:

Optical System: 2 ED APO Triplet (Fully Separated Elements)

Clear Aperture: 86mm

Focal Length: 560mm

Image Circle (with Field Flattener): Ø44mm

Focuser: 2’’ Rack & Pinion Patented Focuser (Twist Lock)

Weight: OTA: 3.5kg/ with Tube Ring: 4.6kg

Diameter of Main Tube: 90mm

Tube Length: Fully Retracted: 456mm/ Fully Extended: 545mm

What's in the Box:

1)  High Quality Aluminium Case with Key
2)  FOT106/ FOT86 with Patent Rack & Pinion Focuser
3)  1.25’’/ 2’’ Twist Lock Adapter
4)  Crank Handle with 1pc 1/4"-20 Hexagon Screw
5)  Tube Rings with 4pcs Dovetail Screws
6)  Star Finder Shoe
7)  Field Flattener (M42) with Exchangeable M48 Adapter
8)  7’’ Vixen Type Mount Dovetail
9)  Quality Certification Card with Serial Number
10) Cleaning Cloth
11) Dust Caps (for Objective Lens)

Instruction FOT86 Manual 

Download here

New Sky-Watcher 80EDX APO Telescope - redesigned body with famous Esprit optics

**Have a chat with us about availability**

Highlights:

• Air Spaced 80mm Apochromatic Triplet (APO)
• FPL-53 extra low dispersion glass
• Zero detectable colour fringing even on bright objects
• Diffraction limited optics
• Fully multi coated lenses
• 3″ CNC machined 11:1 dual speed linear power focuser – rotatable
• Indexed focuser tube
• Knife-edge baffled system to enhance contrast

The Sky-Watcher 80mm Esprit 80EDX Triplet APO Refractor is a highly portable instrument, while still having the imaging capabilities to deliver deep-sky astro photos of stunning quality. It's especially suited for those seeking wide field images and visual observations. 

The air spaced apochromatic triplet lenses use the remarkable Ohara FPL-53 ED (extra low dispersion) glass, with exceptional colour correction over the entire visible spectrum there is no chromatic aberration even on bright objects! Knife edge baffles reduce internal reflections and increase contrast, helping to bring out faint structure in deep sky objects.

A 2-element field flattener is available separately to iron out the natural off-axis astigmatism and field curvature of the objective lens, leaving a fully corrected 42mm field of view.

In The Box:

• 80/400 Apochromatic Refractor
• Rotatable focuser adapter
• Collapsible Dew Shield
• 2″ Dielectric Star Diagonal
• 9×50 Right Angled Erect Image Diagonal
• D Style dovetail Bar
• 2″ to 1.25″ Eyepiece Adaptor
• Aluminium Foam-Lined Case

SPECIFICATIONS