Askar 185APO Premium Reducers and Flatteners
Askar 185APO Premium Reducers and Flatteners
Size
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Product Description
0.8x Reducer
The 0.8x reducer can bring Askar 185APO'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 quadruplet design and supports a 44mm full-frame image circle. 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.
1x Full-frame Flattener
The 1.0x flattener does not change the telescope's focal ratio itself. After connecting with the Askar 185APO, 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 0.79kg. 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
Specifications
| 0.8x Reducer | 1.0x Flattener | |
| 185APO Focal Length (attached) | 1036mm | 1295mm |
| 185APO Focal Ration (attached) | f/5.6 | f/7 |
| Lens Design | Quadruplet |
Quadruplet |
| Back Focus | 55mm | 55mm |
| Weight | 0.63kg | 0.76kg |
| Rear-end Thread Type |
M68x1 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