The William Optics Flat73R is an apochromatic 0.8x flattener/reducer for the Zenithstar 73. The 28mm image circle makes it a perfect match for APS-C sensors.
The Flat73R features adjustable spacing for use with a range of cameras and imaging systems. The Flat73R 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 Z73 which has an M63 x 1 thread. On the camera side there is an M48 x 0.75 male thread, which will accept any wide T-ring.
|Reduction factor||0.8 x|
|Telescope connection||M63 x 1|
|Camera connection||M48 x 0.75|
|Image circle||28 mm|
|Backfocus distance||56.8 mm|
|Adjustment distance for DSLR/Mirrorless cameras||1.8 mm|