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 M92*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
0.8x Reducer Parameters
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?After attaching?140APO Focal length
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784mm
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?After attaching?140APO Focal ratio
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f/5.6
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Lens Number
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Triplet design
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Back Focus
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55mm?from the base of M48 male thread?
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Weight
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0.63kg
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Rear-end thread type
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M54×0.75 M54×0.75-M48×0.75 (M48×0.75 filter thread inside)
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0.8x Reducer Size Diagram
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0.8x Reducer Installation
Spot Diagram
