The QHY268C is in many ways the baby brother to the extreme QHY600C. Its IMX571 sensor featuring similar technology in the smaller APS-C format. Like the IMX455, the 571 is back illuminated (increased sensitivity and no residula bulk image) and natively 16bit for wide dynamic range. The small 3.76µm pixels provide high resolution and are well matched to shorter focal lengths scopes typically used for wide field imaging. Its physical format also make it an ideal combination for use with FASTAR equipped SCT's and the latest RASA systems.
Combined with zero amp glow and a heated chamber window, the QHY268C offers state of the art performance in the APS-C format.
It should be noted that unlike the mono QHY cameras, the 268C PRO does not feature a connector to power a QHY filter wheel. You may think that a filter wheel is unecessary, however it may be preferable to use the camera with Light Pollution, UV/IR or Multi-Spectral filters. As such a filter wheel becomes necessary. Use of a QHY wheel is easily accomodated through a simple Y splitter power cable or dedicated filter wheel power.
Specifications
Model QHY268C
Sensor SONY IMX571 APS-C CMOS Sensor
AR Coating On CMOS chamber Yes. Multi-layer AR coating
Pixel Size 3.76µm x 3.76µm
Effective Pixel Area 6280 x 4210 pixels (inc overscan)
Effective Pixels 26 megapixels
Effective Image Area 23.5mm x 17.5mm
Fullwell 51ke- (75ke- + in extended mode)
AD Sample Depth 16 Bit
Full Resolution frame rate 6 FPS@16BIT
2048 lines 11.5 FPS@16BIT
1080lines 19.5 FPS@16BIT
768lines 25 FPS@16BIT
480lines 34 FPS@16BIT
Readout Noise 0.7e-@ High gain / 3.5e-@ Low gain
Dark Current 0.0005e/pixel/sec @ -20C
Exposure Time Range 30us-3600sec
Anti-Glow Control Yes, Zero Glow
Shutter Type Electric Rolling Shutter
Computer Interface USB3.0
Built-in Image Buffer 1GB / 2GB DDR3 Memory
Cooling System Dual Stage TEC cooler（-35C° below ambient)
Anti-Dew Heater Yes
Silicon Gel Socket Yes
Telescope Interface M54/0.75 Female Thread on the fast installer/center adjust ring
Optical Window Type AR+AR High Quality Multi-Layer Anti-Reflection Coating (Camera needs a UV/IR filter in the light path)
Back Focal Length 17.5mm from face
Weight TBA
Power Consumption ~ TBA
