QHYCCD QHYCFW3S Instruction Manual

- Introduction
QHYCFW3 filter wheels utilize a new motor with direct drive and will reverse direction to take the shortest path when
moving from one filter to another. For Example, in this demonstration the wheel moves from filter position 1 to position 2
to position 3 and then back to 1 again, over to position 7 and back to position 1 without ever making a complete rotation of
the carousel. This saves time if you're doing a lot of filter changes in one imaging session.
LED changes color for each filter position. The tricolor LED assigns one unique color or combination of colors to each
filter position so you can tell if it's moved to the correct position without removing it from the Telescope.
The CFW3 is also thin. This feature and the short back focus of the COLDMOS cameras means you can add one of several
camera lens adapters for Canon and Nikon camera lenses for wide field imaging with the filter wheel.
In the center of the back plate is a 12-volt DC power port. This port is threaded for a short extension cable that is supplied
with the camera that securely attaches such that it will not accidentally disconnect while you are imaging.
- Specifications
Filter
Filter Supported
Wheel
CFW3S-
7*1.25-inch
SR
mounted/31mm
CFW3S-
unmounted
US
5*2-inch
CFW3M-
mounted/50mm
SR
unmounted
CFW3M- 7*36mm
US unmounted
7*2-inch
CFW3L mounted/50mm
unmounted
9*2-inch
mounted/50mm
unmounted
CFW3XL
or 7*50mm
square
unmounted
*Back Focus Consumed
For the convenience of calculation, all the data displayed are the increase in the back focal length taken up by using the
adapter, which is not necessarily equal to the thickness of the component itself. All the adapter data provided by
QHYCCD are based on the focal length increment. For More information please see:
https://www.qhyccd.com/astronomical-camera-adapter-bfl-solution/
The Calculation of Filter Wheel's back focus consumed includes two parts: The thickness of the filter wheel body (like the
15.5mm of CFW3S-US), and the back focus consumed (like 4mm of CFW3S-US). Now new cams don't need this adapter
anymore, like QHY533M, QHY268M, QHY600M-PH SBFL, etc.
Recommended Back Focus
Gears Consumed*
QHY533M, 20mm
QHY183M (SR)+4mm
QHY5III Mono (Adapter
Planetary Cams 15.5mm
(CFW1.25"Adapter (SR)+4mm
needed (Adapter
QHY268M, 20.5mm+2mm
QHY600M (Adapter
QHY163M,
17mm+2mm
QHY294M,
(Adapter
QHY268M
QHY600M
21.5mm
(PH/Pro)
QHY461PH
21.5mm
QHY600M-PH
SBFL
Weight Note
There's no difference between S-SR
About and S-US expect their depth, but S-SR
430g can be compatible with thicker 1.25"
mounted filters.
About
720g
About
700g
About
900g
A special adapter needed when
connecting QHY600 SBFL and
About
CFW3XL, see
1500g
https://www.qhyccd.com/qhy600sbfl-
cfw3xl-adapter/