Askar 1X Flattener for 80ED Refractor - 80ED-FLAT Antlia Dual & Tri-Band Filters Patented dual encoder design allows

Patented dual encoder design allows the telescope to be moved manually whenever the user wishes - but with no need for re-alignment

and the contrast between the nebulae and the signal-to-noise ratio are improved to the greatest extent

Seasonal star charts display the locations of the best deep-sky objects for summer

as long as the camera/optics in the iPolar can see more than 4 stars in the area of sky that it is seeing

we often encounter the problem of needing more focus travel for certain eyepieces

Askar 1X Flattener for 80ED Refractor - 80ED-FLAT Antlia Dual & Tri-Band Filters Patented dual encoder design allows1X Field Flattener for the Askar 80ED Refractor OTA This 1X Flattener is specifically designed for the Askar 80ED refractor. Its triplet design (with one element of ED glass) is optimized for APS C. With this flattener installed you will achieve a flatter field and sharper, rounder stars at the edges, as it corrects for both field curvature and coma. The Askar 80ED 1X Flattener does not change the native focal ratio of the 80ED OTA; it remains at f 7.