Askar Focal Plane Adjuster - FPA vendor-rigel-systems The ZWO 2″ IR UV

The ZWO 2″ IR UV CUT filter is suitable for color cameras with an AR window

Minor mirror axis is 65 mm for Full Frame illumination

93 arc seconds Light Gathering Power (Compared to human eye): 329x Secondary Mirror Obstruction: 51mm (2

Telescope Compatibility: Celestron 8” Schmidt-Cassegrain and EdgeHD Telescopes Filter diameter (external) 235 mm Filter diameter (internal) 225 mm Filter thickness 32

but you can always use the 80PHQ on a heavy-duty equatorial mount with a larger saddle (Losmandy-style) with the addition of an accessory or two

Askar Focal Plane Adjuster - FPA vendor-rigel-systems The ZWO 2″ IR UVMost of the focal plane adjusters not the market today use a three point push pull mechanism to make adjustments. However, when adjusting the tilt angle in this manner, the relative distance between the two ends changes, thus changing the back focus and lowering star quality at the edges of the image. The Askar focal plane adjuster uses a unique spherical adjustment design to adjust the tilt angle, ensuring the focal plane is perpendicular to the