QHYCFW3-S is a 3rd generation medium size motorised colour filter wheel designed and manufactured by QHYCCD.

Supports

• 5 unmounted 36mm diameter filters or
• 7 standard 1.25" mounted filters

Highlights

• Gear driven disk. Stable and solid.
• Specially designed filter disk allow different glass thickness for unmounted filters. From 0.7mm to 5mm.
• Motor moved to a corner to increase effective use of space
• Increases the precision for filter location.
• Support USB port and powered by USB when connected with computer.
• Support the 4PIN QHY CFW socket on QHY163M, QHY11, QHY21/22/23 and InterCam series camera. 
• Support the 2pin socket with QHY9 (requires external 12VDC power supply).
• Open source firmware, Arduino compatible

Mechanical specification

QHYCFW2-M has both M54/0.75, 3.5mm thickness thread on telescope side M54/0.75 2.5mm thickness thread on camera side. On camera side it has a 2mm stage which is used for preventing light leaking when connect with camera. It has six M3 screw holes on telescope side which can be used to connect QHYOAG and six 3mm through holes on camera side which can be used to connect InterCam series camera.

Downloads

QHYCFW2 ASCOM Plugin (last updated: 12 January 2017)
- Use this version if filter wheel is connected directly to QHYCCD cameras

QHYCFW & QHYCFW2 ASCOM Plugin RS232 (last updated: 1 September 2017)
- Use this version if filter wheel is connected via USB

Both ASCOM plugins for QHYCFW2 can co-exist. For changelogs, please refer to the downloaded files.