Askar 1X Flattener for 103 APO Refractor - 1XFLAT
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The Askar 1x flattener keeps the native focal ratio of the Askar 103 APO at f/6.8 while correcting field curvature and coma. Ā The result is pinpoint starsĀ out to the edges of the field of view, which is wonderful for imaging.
The Askar 1.0x Flattener hasĀ a triplet design and supports a 44mm full-frame image circle. The back focus from the M48 thread is a standard 55mm. The front thread of the flattener is M84*1.
At the camera end, the 1X Flattener is equipped with two threads (M54*0.75 and M48*0.75)Ā for easy connection to your camera. 2" filters can be installed if you wish.Ā
The body of the Askar 1X Flattener is CNC machined for longevity and beauty. Ā Two end caps are included to keep the optics clean and safe when not in use.
Askar 1X Flattener Specifications
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103APO Focal length with Flattener |
700.4mm |
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103APO Focal ratio with Flattener |
f/6.8 |
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Optical Design |
Triplet design |
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Back Focus |
55mm from the base of M48 male thread |
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Weight |
0.58kg |
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Rear-end thread type |
M54Ć0.75 |
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