The SharpStar field flattener & reducer for the 61EDPH is a dedicated corrector with a reducing power of 0.82x. It reduces the focal length of the 61EDPH to 275mm and the focal ratio to f/4.5.
This 3 elements corrector delivers a fully illuminated and corrected field of 44mm, making this telescope compatible with full frame sensors. The working distance between the flattener and the sensor is 55mm.
The SharpStar flattener can be connected to the focuser of the Sharpstar 61EDPH by using the M63x1 male thread, and on the camera side there is the universal M48x1 male thread.

Spot diagram 61EDPH + 0.82x dedicated reducer