QHY294M Pro Cooled Monochrome Professional CMOS Camera
Price as Configured: $1,299.00
The QHYCCD QHY294M Pro is a premium-quality cooled monochrome camera with an impressive CMOS sensor. The QHY294M uses the popular SONY IMX492 BSI CMOS sensor, achieving the pixel number output necessary for 4K at 120 frame/s.
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Back Focal Length (BFL), in the commercial camera field, refers to the design distance from the center of the rear lens element to the surface of the sensor. Generally, the lens will only focus correctly at infinity if the camera’s back focal length meets the standard requirements provided by the lens manufacturer. This is also true for many Multi-Purpose Coma Correctors designed to be used on telescopes before the camera.
| Optical system | Back focal length required |
| Typical Multi-Purpose Coma Corrector | 55mm – 57.5mm |
| Canon 35mm lens | 44.1mm |
| Nikon 35mm lens | 46.5mm |
A1: Connecting MPCC that requires 55mm BFL and M48 interface to Camera with Filter Wheel and OAG
Note:
- If you only own CFW3M-SR whose BFL is 20.5mm rather than 17.5mm, this adapter combination can still be used, just remove the 3mm and 0.5mm adapters.
- If your MPCC requires a BFL different from 55mm, this adjustment can be made by selecting the appropriate spacer between the MPCC and the OAG. For example, an MPCC that requires 57.5mm can be used instead by adding a spacer ring or rings that add 2.5mm of BFL. to the diagram above.
- If you don’t use an OAG, you can use a 10mm spacer adapter in the adapter kits to replace the original position of OAG.
- Put OAG at the position next to the M48 Output to make both main cam and guiding cam focused.
Note: You need to remove the filter wheel and the original connection interface of the camera and replace it with a new adapter.
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