Brand: SharpStar

Askar 140APO Premium Reducers and Flatteners

Brand: SharpStar

Askar 140APO Premium Reducers and Flatteners

The Askar 140 APO comes with two optional premium accessories, a 1.0x flattener and a 0.8x reducer.
  • Optimized for the Askar 140APO
  • Flexible options to meet your needs
  • Premium glass elements in triplet and quadruplet designs
  • Equip with two sizes of adapters
$298.00 USD

Size

0.8x Reducer (ASKAR-140APO-R08) 1.0x Flattener (ASKAR-140APO-F10)

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Product Description

0.8x Reducer

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.

1x Full-frame Flattener

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 0.75kg. 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 M68*1, M54*0.75 and M48*0.75 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.

What's in the Box

  • Reducer or Flattener

Specifications

0.8x Reducer 1.0x Flattener
140APO Focal Length (attached) 784mm 980mm
140APO Focal Ration (attached) f/5.6 f/7
Lens Design Triplet Triplet
Back Focus 55mm 55mm
Weight 0.63kg 0.76kg
Rear-end Thread Type M54x0.75
M54x0.75-M48x0.75 (M48x0.75 filter thread inside)
M68x1
M54x0.75
M54x0.75-M48x0.75 (M48x0.75 filter thread inside)

 

Dimension Diagrams

 


Installation Diagram


Spot Diagrams


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