Askar 0.85 Focal Reducer for 80ED Refractor - 80ED-085RED Pentax XW Eyepieces The effective optical path length

The effective optical path length of the base T-2 Maxbright Diagonal is 54mm

and that it is parallel to the focuser body surface

Lens Elements: Two (2) Super ED Glass

Focal Length (mm): 2032 mm (80 in)

Optical Tube Weight: 14 lbs (6

Askar 0.85 Focal Reducer for 80ED Refractor - 80ED-085RED Pentax XW Eyepieces The effective optical path lengthThe Askar 0. 85X Focal Reducer is designed specifically for the 80ED refractor. By adding this reducer to the optical chain of your telescope, the focal length will f 5. 9 for a wider field of view and faster imaging times. The reducer features a triplet optical design that includes one ED element. It is designed as a focal reducer but also provides some field flattening correction. This Askar 80ED . 85X Reducer is optimized for the APS C frame. The