Hi everyone,
I wanted to ask if anyone here is using this combination:
ZWO ASI2600MM Pro camera (P25)
QHY CFW3-M filter wheel
If you are using them together, which adapters did you use to connect them (M42, M54, spacers, etc.)?
If you can share your exact imaging train (camera → adapter → filter wheel → rest of the setup) or a photo of the assembly, that would be extremely helpful.
Thanks!
While I don’t have an ASI2600MM, I know enough about the camera and the QHY ecosystem to explain what you need.
The camera and filter wheel will get screwed/bolted together like any other camera and filter wheel would. The difference is ZWO uses 2.5mm screws and QHY uses 3mm. You can mount up the QHY filter wheel but you will need to purchase an assorted 2.5mm countersunk screw kit.
I’m always ordering my adapters from PreciseParts, superb quality, not cheap.
Select your equipment and specify your adapter backfocus on link below. There are numerous options to connect both.
Brian Puhl · Dec 7, 2025, 02:29 AM
While I don’t have an ASI2600MM, I know enough about the camera and the QHY ecosystem to explain what you need.
The camera and filter wheel will get screwed/bolted together like any other camera and filter wheel would. The difference is ZWO uses 2.5mm screws and QHY uses 3mm. You can mount up the QHY filter wheel but you will need to purchase an assorted 2.5mm countersunk screw kit.
Hi Brian! It was just as you said. Thank you so much for your help!