Your cart
Close Alternative Icon


QHY268 Colour Camera


The QHY268C is a 26 Megapixel, back-illuminated, cooled color CMOS camera based on the Sony IMX571 sensor with 16-bit A/D and 3.76um pixels. The QHY268C is available only in a color model.

Native 16-Bits
The Sony IMX571 sensor has on-chip 16-bit A/D for highest resolution of greyscale. The output is real 16-bits with 65536 levels. Compared to 12-bit and 14-bit A/D, 16-bits provides higher sampling resolution. At high gain, the camera yields close to 1e-/ADU with no sample error and low read noise.

High Dynamic Range
Great full well brings vivid colors. One benefit of the back-illuminated CMOS structure is improved full well capacity. This is particularly helpful for sensors with small pixels. Even with unbinned, the 3.76um pixels of the QHY268C has a superb full well capacity of 75ke-.

Ultra Low Read Noise
  • 0.7e- Noise at High gain
  • 3.5e- Noise at Low Gain
The QHY268C has only 0.7 electron of read noise at highest gain and 6.8 FPS at full resolution readout speed. One electron of read noise means the camera can achieve a SNR>3 at only 4 to 6 photons. This is perfect performance when conditions are photon limited, i.e., short exposures, narrow band imaging, etc., making this large area sensor ideal for sky surveys and time domain astronomy.

Back-Illuminated, High QE
The back-illuminated Sony Exmor sensor has about twice the QE of similar front illuminated sensors. The QHY268C has zero amplifer glow. In addition the dark current is only 0.0005e/pixel/sec @ -20C.
CMOS Sensor
26 Megapixels (6280 x 4210 incl. overscan and optically black pixels)
Pixel Size
3.76um x 3.76um
Image Area
APS-C Format, 23.5mm x 15.7mm (28.3mm Diagonal)
Colour / Mono
Color Only
Full Well Capacity
51ke- / > 80ke- in extended mode
Native 16-bit
Full Frame Rate
6 FPS @ 16-bits
Read Noise
0.7e- High Gain, 3.5e- Low Gain
Dark Current
0.0005e/pixel/sec @ -20C 0.001e/pixel/sec @ -10C
Exposure Time Range
30us - 3600sec
Firmware/FPGA remotely upgrade
Supported via USB Port
Shutter Type
Electronic Rolling Shutter
Computer Interface
USB 3.0
Built-in Image Buffer
1GByte/2GByte DDR3 Memory
Cooling System
Dual Stage TEC cooler(-35C below ambient)
Anti-Dew Heater
Telescope Interface
Optical Window
AR+AR High Quality Multi-Layer Anti-Reflection Coating
Non-volatile memory / In camera storage
Built-in total 64MByte Flash Memory. 10MBytes user-accessible space for stellar ROI frames for analysis for exoplanet investigation, occultations, atmospheric seeing measurements, focus, optical analysis, etc. Supports 100*100 image x 500 frames; 50*50 image x 4000frames; 25*25 image x 16000 frames; 10*10 image x 250000 frames .