Askar 120APO 1x Full-frame Flattener

The 1x flattener does not change the telescope's focal ratio itself. After connecting with the Askar 120APO, 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 0.75kg. 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 M54*0.75 and M48*0.75 two 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. SPECIFICATIONS （After attaching）120APO Focal length 840mm （After attaching）120APO Focal ratio f/7 Lens Number Triplet design Back Focus 55mm（from the base of M48 male thread） Weight 0.75kg Rear-end thread type M54×0.75 M54×0.75-M48×0.75(M48×0.75 filter thread inside)