Small size. Support five 36mm umounted filter or six 1.25inch filter .Thickness is only 15.5mm.The weight of QHYCFW2-S is 365g.

QHYCFW2-S is the secondary generation color filter wheel of QHYCCD. We improved the mechanical design and electric design. The QHYCFW2-S has the following advantages:

  • Gear driven disk. Stable and solid.
  • Specially designed filter disk allow different glass thickness for unmounted filters. From 0.7mm to 7mm.
  • Motor moved to a corner to increase the work area.
  • Increased the precision for filter location.
  • Support USB port and powered by USB when connected with computer.
  • Support the 4PIN QHY CFW socket on QHY11,QHY21/22/23 and InterCam series camera.
  • Support the 2pin socket with QHY9(Need external power supply).
  • Open Source Firmware, Arduino compatible

Mechanical Information for QHYCFW2-S

It has both M42/0.75, 2.5mm thickness screw in telescope side and camera side. On camera side it has a 1.5mm stage which is used for avoid the light leaking when connect camera. It has six M3 screw holes on telescope side which can be used to connect QHYOAG and four 3mm through holes on camera side which can be used to connect InterCam series camera.
Six holes 1.25 -inch disk is avaliable
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Driver and Software Download
ASCOM FiltersPlug-in
ASCOM Filter[RS232] plug-in

Document Download

Refer to User Manual


QHYCFW2-S Supported Filters 
5 position 36mm
Maxium Glass Thickness 4mm unmounted filters
6 position 1.25inch
Maxium 5.7mm for the filter holder (do not includes the screw thread of the holder).