Askar Guiding Ring Set for FMA180 Guidescope (Set of 2 Rings) #GR40
Askar Guiding Ring Set for FMA180 Guidescope (Set of 2 Rings) #GR40 is a stylish and elegant guiding ring with three-point collimation function. It can perfectly fit the Askar FMA180 to achieve ideal guiding effect. Though it’s designed mainly for FMA180, it’s suitable for tubes with a diameter of less than 50mm.
With the upgrading of electronic astronomical accessories, electronic devices are more and more widely used in astronomical observation and astrophotography. To better meet the needs of astronomy amateurs, we launched the FMA180 PRO AF Kit.
ASKAR FMA135 30mm aperture apochromatic telescope/camera lens features three-element objective lens with ED element for superb color correction and image quality
Include three-element field flattener to deliver pinpoint stars across APS-C or smaller sensors
Operates as a manual-focus f/4.5 apochromatic camera lens for astrophotography or as a guide/finder scope
Includes adapter for visual observation with a 1.25” eyepiece, tube mounting ring, and Vixen-style dovetail
Uses three-element objective lens with two ED elements for superb color correction and image quality
Configures as a finder/telescope/guide scope with a focal length of 220mm and focal ratio of f/5.5
Includes three-element focal reducer and spacers to configure as a six-element f/4.5 apo telescope with focal length of 180mm for wide-field astronomical imaging
Includes tube mounting rings, Vixen-style dovetail, and Swiss-Arca mounting plate for a wide range of mounting configurations
Askar FMA180 Pro vs FMA180 original:
All new marked 360º rotator
New one-piece internal focus system
New finder base for attaching accessories like the ASIAIR
Improved longer Vixen-style dovetail
Upgraded metal knurled thumbscrews
Larger M48x0.75 rear threads
New filter thread adapter allowing 2" filters to be inserted
Uses three-element objective lens with two ED elements for superb color correction and image quality
Configures as a finder/telescope/guide scope with a focal length of 275mm and focal ratio of f/5.5
Includes four-element 0.84x focal reducer to configure as a seven-element f/4.6 apo telescope with focal length of 230mm for wide-field astronomical imaging
Includes tube mounting rings, Vixen-style dovetail, and carrying handle with guidescope slot for a wide range of mounting configurations