QHYCFW3
QHYCFW3
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The QHYCFW3 series filter wheels are designed to accommodate filters ranging from 1.25-inch to 50 millimeters square. These filter wheels can be controlled either through an independent external program using the filter wheel’s USB port, or via a special 4-pin port. When connected to the QHY 4-pin port, there’s no need for an additional power cable or control program. All filter wheel functions can be managed directly through the QHY camera1.
Here are the key specifications for different models in the QHYCFW3 series:
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QHYCFW3S-SR/US: Supports 7*1.25-inch mounted filters or 31mm unmounted filters. Compatible with cameras like QHY533M and QHY183M. Back focus consumed: 20mm (SR) + 4mm (Adapter). Weight: Approximately 430g1.
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QHYCFW3M-SR: Accommodates 5*2-inch mounted filters or 50mm unmounted filters. Suitable for cameras like QHY268M and QHY600M. Back focus consumed: 20.5mm + 2mm (Adapter). Weight: About 720g1.
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QHYCFW3M-US: Designed for 7*36mm unmounted filters, compatible with cameras like QHY163M, QHY294M, and QHY268M. Back focus consumed: 17mm + 2mm (Adapter). Weight: Approximately 700g1.
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QHYCFW3L: Supports 7*2-inch mounted filters or 50mm unmounted filters (PH/Pro). Ideal for QHY600M (PH/Pro). Back focus consumed: 21.5mm. Weight: About 900g1.
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QHYCFW3XL: Offers 9*2-inch mounted filters or 7*50mm square unmounted filters. Compatible with QHY461PH and QHY600M-PH SBFL. Back focus consumed: 21.5mm. Weight: Approximately 1500g. Note that a special adapter is required when connecting QHY600 SBFL and CFW3XL123.
These filter wheels utilize a new motor with direct drive, allowing them to reverse direction and take the shortest path when moving from one filter position to another. The tricolor LED assigns a unique color or combination of colors to each filter position, making it easy to verify the correct position without removing it from the telescope. Additionally, the CFW3’s thin design allows compatibility with camera lens adapters for wide-field imaging with the filter wheel
Specifications
| Filter Wheel | Filter Supported | Recommended Gears | Back Focus Consumed* | Weight | Note |
| CFW3S-SR CFW3S-US |
7*1.25-inch mounted/31mm unmounted | QHY533M, QHY183M QHY5III Mono Planetary Cams (CFW1.25”Adapter needed） |
20mm (SR)+4mm (Adapter） 15.5mm (SR)+4mm (Adapter） |
About 430g | There’s no difference between S-SR and S-US expect their depth, but S-SR can be compatible with thicker 1.25” mounted filters. |
| CFW3M-SR | 5*2-inch mounted/50mm unmounted | QHY268M, QHY600M | 20.5mm+2mm (Adapter） | About 720g | |
| CFW3M-US | 7*36mm unmounted | QHY163M, QHY294M, QHY268M | 17mm+2mm (Adapter） | About 700g | |
| CFW3L | 7*2-inch mounted/50mm unmounted | QHY600M (PH/Pro) | 21.5mm | About 900g | |
| CFW3XL | 9*2-inch mounted/50mm unmounted
or 7*50mm square unmounted |
QHY461PH
QHY600M-PH SBFL |
21.5mm | About 1500g | A special adapter needed when connecting QHY600 SBFL and CFW3XL, see https://www.qhyccd.com/qhy600sbfl-cfw3xl-a |
21.5mm About 1500g A special adapter needed when connecting QHY600 SBFL and CFW3XL, see https://www.qhyccd.com/qhy600sbfl-cfw3xl-adapter/
*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.
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.
| Filter Wheel | Filter Supported | Recommended Gears | Back Focus Consumed* | Weight | Note |
| CFW3S-SR CFW3S-US |
7*1.25-inch mounted/31mm unmounted | QHY533M, QHY183M QHY5III Mono Planetary Cams (CFW1.25”Adapter needed） |
20mm (SR)+4mm (Adapter） 15.5mm (SR)+4mm (Adapter） |
About 430g | There’s no difference between S-SR and S-US expect their depth, but S-SR can be compatible with thicker 1.25” mounted filters. |
| CFW3M-SR | 5*2-inch mounted/50mm unmounted | QHY268M, QHY600M | 20.5mm+2mm (Adapter） | About 720g | |
| CFW3M-US | 7*36mm unmounted | QHY163M, QHY294M, QHY268M | 17mm+2mm (Adapter） | About 700g | |
| CFW3L | 7*2-inch mounted/50mm unmounted | QHY600M (PH/Pro) | 21.5mm | About 900g | |
| CFW3XL | 9*2-inch mounted/50mm unmounted
or 7*50mm square unmounted |
QHY461PH
QHY600M-PH SBFL |
21.5mm | About 1500g | A special adapter needed when connecting QHY600 SBFL and CFW3XL, see https://www.qhyccd.com/qhy600sbfl-cfw3xl-adapter/ |
*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.
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.
| Filter Wheel | Filter Supported | Recommended Gears | Back Focus Consumed* | Weight | Note |
| CFW3S-SR CFW3S-US |
7*1.25-inch mounted/31mm unmounted | QHY533M, QHY183M QHY5III Mono Planetary Cams (CFW1.25”Adapter needed） |
20mm (SR)+4mm (Adapter） 15.5mm (SR)+4mm (Adapter） |
About 430g | There’s no difference between S-SR and S-US expect their depth, but S-SR can be compatible with thicker 1.25” mounted filters. |
| CFW3M-SR | 5*2-inch mounted/50mm unmounted | QHY268M, QHY600M | 20.5mm+2mm (Adapter） | About 720g | |
| CFW3M-US | 7*36mm unmounted | QHY163M, QHY294M, QHY268M | 17mm+2mm (Adapter） | About 700g | |
| CFW3L | 7*2-inch mounted/50mm unmounted | QHY600M (PH/Pro) | 21.5mm | About 900g | |
| CFW3XL | 9*2-inch mounted/50mm unmounted
or 7*50mm square unmounted |
QHY461PH
QHY600M-PH SBFL |
21.5mm | About 1500g | A special adapter needed when connecting QHY600 SBFL and CFW3XL, see https://www.qhyccd.com/qhy600sbfl-cfw3xl-adapter/ |
*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.
