Askar 140APO 1.0x Full Frame Flattener User Manual
- June 1, 2024
- Askar
Table of Contents
Askar 140APO 1.0x Full Frame Flattener
Instructions For Use
The 1.0x flattener does not change the telescope’s focal ratio itself. After connecting with the Askar 140APO, it still maintained a focal ratio of 7. The flattener corrects field curvature and coma, resulting in flatter field edges and finer star points.
The 1.0x flattener adopts a triplet design and supports a 44mm full-frame image circle. The overall weight is 0.79kg. The back focus from the M48 thread is a standard 55mm. The front thread is M921. At the camera end, it is equipped with M681, M540.75 and M480.75 three sizes of adapters, which are convenient for connection. At the same time, it has a built-in M48*0.75 2-inch filter thread, which can be directly installed and used. The overall CNC machined, both end threaded metal caps prevent ash when not in use.
Parameters
(After attaching）140APO Focal length：980mm
(After attaching）140APO Focal ratio：f/7
Lens Number：Triplet design
Back Focus：55mm（from the base of M48 male thread）
Weight：0.79kg
Rear-end thread type：M68×1
M54×0.75
M54×0.75-M48×0.75(M48×0.75 filter thread inside)
Installation Instruction
Unscrew the 2″ adapter and the 1.25″ adapter
Unscrew the dust cap of the accessory and screw it into the 140APO
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