QHY268C-L, cooled, back-illuminated, color CMOS camera, Pro Lite model


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High Resolution

26 Megapixels
APS-C format

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

Native 16-Bits

On-chip 16-bit A/D
65536 Levels

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

75ke full well
Vivd colors

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

Zero Amp-Glow
Extremely Low Dark Current

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.

2GB Image Buffer

In order to get smooth uninterrupted high speed transfer of data, the QHY268C has a large 2GByte DDR3 memory buffer.


USB3.0 interface. 6.8FPS

Best Match for HyerStar System

The small pixels and round camera body of QHY268C plus the APS-C size sensor make the QHY268C an ideal match for the HyperStar and RASA optical systems.

Weight 4 lbs
Dimensions 8 × 8 × 8 in

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