140APO 0.8x Full-frame Reducer

The Askar 140 APO comes with three optional premium accessories, a 1.0x flattener and a 0.8x reducer. Introduced here is the 0.8x reducer, which is optimized for the Askar 140APO, and can provide more possibilities for telescope use.

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Product introduction

 

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

(After attaching)140APO Focal length

784mm

(After attaching)140APO Focal ratio

f/5.6

Lens Number

Triplet design

Back Focus

55mm(from the base of M48 male thread)

Weight

0.63kg

Rear-end thread type

M54×0.75   
 M54×0.75-M48×0.75 (M48×0.75 filter thread inside)

0.8x Reducer Size Diagram

11

0.8x Reducer Installation

11

11

Spot Diagram

11

Video

Images

Drew Evans  |  IC434  |  Askar 140APO+140APO 0.8x Full-frame Reducer+ZWO ASI2400MC

Astrotivissa  |  NGC 2174 Monkey Head Nebula  |  Askar 140APO+140APO 0.8x Full-frame Reducer+ZWO ASI2600MC

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