71F Flat-Field Starizona 25” focusers

25” focusers

with plenty of flexibility for post-processing and fine-tuning

displays a super wide field of view

The housing is machined with precision instruments to make sure the optics stay perfectly aligned

such as the formation of the first galaxies

71F Flat-Field Starizona 25” focusersThe Askar 71F is an OTA with an aperture of 71mm, a focal length of 490mm, and a native focal ratio of F6. 9. The Askar 71F adopts a quadruplet air spaced APO lens design, including one piece of ED glass which can effectively reduce chromatic aberration. The Askar 71F supports 44mm full frame imaging with great performance of the surrounding star points. The Askar 71F is a self flattened design that allows users to avoid calculating the back focus and