Askar 185 APO 0.8x Full-frame Reducer

0.8× full-frame reducer for 185 APO (Askar). The reducer with field-flattening correction is designed for the Askar 185 APO telescope. It shortens its focal length from 1295 to 1036 mm and changes the focal ratio from f/7 to f/5.6, widening the field of view. The four-element design supports full-frame sensors and a 44 mm image circle.

Key features

• focal reduction of 0.8× with field-flattening correction
• support for full-frame sensors
• back focus of 55 mm from the base of the male M48 thread
• internal M48 × 0.75 filter thread for a 2" filter

Included items

• reducer for Askar 185 APO with M68, M54 and M48 adapters
• threaded metal caps for both ends

Technical specifications

• optical design: four lens elements
• reduction factor: 0.8×
• compatibility: Askar 185 APO
• focal length without reducer: 1295 mm
• focal length with reducer: 1036 mm
• focal ratio without reducer: f/7
• focal ratio with reducer: f/5.6
• image circle diameter: 44 mm
• focuser-side thread: M92 × 1
• camera-side connections: M68 × 1, M54 × 0.75 and M48 × 0.75
• filter thread: female M48 × 0.75, for 2" filters
• back focus: 55 mm from the base of the male M48 thread
• overall length: 110 mm
• weight: 0.95 kg
• warranty: 24 months

The reducer expands the imaging options of the 185 APO telescope at a focal length of 1036 mm.