Sky-Watcher 0.85x Focal Reducer/Flattener for EvoStar 72ED f/5.8 Refractor Guidescope

• Compatible with both APS-C and full frame sensors, APS-C (crop sensors) and smaller recommended
• 55mm back focus
• Drops f/ratio from native f/5.8 (420mm) to f/4.93 (355mm)
• Reduces exposure time by 38% compared to native f/5.8
• 5.8 x 3.87-degree field of view when used with a full frame camera
• 3.79 x 2.53-degree field of view when used with APS-C crop sensor 
• Includes thread-on adapter to mount reducer to Evostar 72ED focuser

• For Astrophotography/Astroimaging
• Virtually Eliminate Spherical Aberration
• Shortens Focal Ratio from f/5.8 to f/4.9
• Reduces Exposure Times by 38%
• Use with APS-C and Full Frame Cameras
• 55mm Back Focus

New Adjustable Flat6All (T-mount not included)

PRODUCT DESCRIPTION: Field flattener / X0.8 Reducer. 

This very elegant 2" reducer/field flattener has been designed to optimize the flat-field imaging performance of William Optics F/6 to F7.5 ratio refactors. WO Flat 6All will provide good illumination and flat field across 97% of full frame sized sensors.

Full frame size 
• Designed with nearly Full frame chip-size DSLR cameras in mind. 
• FMC tripllet APO design.
• Produced entirely with the best Ohara optical glasses. 

Amazing

• Reducing factor 0.8X.
• Adjustable design, for perfect back focus it can be used with other models of refractor
• 48mm filter ready

Superb Finish
• William Optics polished anodized finish.
• All internal surfaces threaded and blackened to prevent reflections.

Easy to Use  
• Will accept any standard 48mm T-ring for your camera.

Suitable for
• GT71, GT81, Z103, Z126.

ZWO Hand Controller for Electronic Automatic Focuser (EAF)

This Hand Controller is designed for the ZWO Electronic Automatic Focuser.

• Control your entire imaging runs from a smartphone or tablet, even from indoors!
• Support handle controller and manual focusing.
• Support temperature sensor.
• USB HID device and drive-free.
• Stable and durable.

• The Celestron Cheshire Collimation Eyepiece is ideal for precise collimation of Newtonians and helpful for aligning Schmidt-Cassegrains