71F Flat-Field Diagonal Open Box return product

Open Box return product

adjust the spacing of the L-shaped adapter plate to a suitable position

Compared to FMA180

but have natural colors

Any dust you see in the photos is easily removable - it seems that these develop an electrostatic charge such that the dust in the air is just attracted to the optics

71F Flat-Field Diagonal Open Box return productThe 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