About this product
Model: askar_120_red
Part Number: ASKRE12008
Askar Full-Frame 0.8x Focal Reducer / Flattener for 120APO.
The 0.8x reducer can bring Askar 120APO's focal ratio down to F5.6.
A shorter focal ratio enables the OTA to have a wider field of view and faster exposure times, making it suitable for capturing large areas of nebulae, star clusters, and faint, fast-moving celestial objects.
The 0.8x reducer adopts a triplet design and supports a 44mm full-frame image circle.
The overall weight is 0.75kg. The back focus from the M48 thread is a standard 55mm.
The front thread is M84*1. At the camera end, it is equipped with M54*0.75 and M48*0.75 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 Reducer is CNC machined, and both end-threaded metal caps prevent dust when not in use.
0.8x Reducer Installation
Spot Diagram
Specifications
| After attaching）120APO Focal length | 672mm |
| （After attaching）120APO Focal ratio | f/5.6 |
| Lens Number | Triplet design |
| Back Focus | 55mm（from the base of M48 male thread） |
| Weight | 0.75kg |
| Rear-end thread type | M54×0.75
M54×0.75-M48×0.75 (M48×0.75 filter thread inside) |
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