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The 0.8x reducer can bring Askar 140APO's focal ratio down to F5.6. This is a standard reducer with field flattening capabilities as well. A shorter focal ratio allows 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 two 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.
Specifications
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（After attaching）140APO Focal length |
784mm |
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（After attaching）140APO Focal ratio |
f/5.6 |
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Lens Number |
Triplet design |
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Back Focus |
55mm（from the base of M48 male thread） |
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Weight |
0.63kg |
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Rear-end thread type |
M54×0.75 |
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