The William Optics Flat61R is an apochromatic 0.8x flattener/reducer for the Zenithstar 61. The 28mm image circle makes it a perfect match for APS-C sensors.
The Flat61R features adjustable spacing for use with a range of cameras and imaging systems. The Flat61R includes an M48 filter thread which will hold any standard 2" mounted filter. It also includes a handy camera rotator for precise framing of targets.
Compatible with William Optics Z61 which has an M54 x 0.75 thread. On the camera side there is an M48 x 0.75 male thread, which will accept any wide T-ring.
Note: As this is an adjustable flattener, you must adjust the distance for your specific telescope. See the Instructions tab above.