The QHY A1 Combo Adapter Set is offered for the QHY163M or QHY294M camera when the objective is to connect an M48 MPCC (Multi-Purpose Coma Corrector from Baader, or any corrector, reducer or flattener with the same threads & back focus), requiring 55mm of back focus, with the camera, CFW3M-US or -SR filter wheel, and OAGM. Of course, the camera, MPCC or other corrective optics, CFW & OAG are sold separately. This Combo A1 kit includes the following adapters, spacers & hardware. See the drawing below for a visual on how to connect your imaging chain. M48 5mm Spacer Adapter M48 10 mm Spacer Adapter 3mm Spacer 0.5 mm Spacer 22 mm M3 Screws X 6 Note: If you only own CFW3M-SR whose BFL is 20.5mm rather than 17.5mm, this adapter combination can still be used, just remove the 3mm and 0.5mm adapters. If your MPCC requires a BFL different from 55mm, this adjustment can be made by selecting the appropriate spacer between the MPCC and the OAG. For example, an MPCC that requires 57.5mm can be used instead by adding a spacer ring or rings that add 2.5mm of BFL. to the diagram above. If you don’t use an OAG, you can use a 10mm spacer adapter in the adapter kits to replace the original position of OAG. Put OAG at the position next to the M48 Output to make both main cam and guiding cam focused.
