| QHY268 M/C PH MEDIUM FORMAT SCIENTIFIC CMOS CAMERA. High Resolution APS-C format – 16 bit – BSI – 26MP. Native 16-Bits On-chip 16-bit A/D – 65536 Levels. High Dynamic Range – 75ke full well – Vivid colors. Ultra-Low Read Noise 0.7e- Noise at High gain and 3.5e- Noise at Low Gain. |
The QHY268 M/C PH is a cooled, back-illuminated, CMOS camera based on the Sony IMX571 sensor with native 16-bit A/D and 3.76um pixels. The Sony IMX571 sensor has on-chip 16-bit A/D for the 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 sampling error and low read noise.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 QHY268 M/C PH has a superb full well capacity of 75ke-.
The QHY268 M/C PH has only 0.7 electrons of reading noise at the highest gain and 6.8 FPS at full resolution readout speed. One electron of reading noise means the camera can achieve an SNR>3 at only 4 to 6 photons. This is the 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.
 M42 GREAT ORION NEBULA, by Jarrett Trezzo Telescopes: Celestron Rowe-Ackermann Schmidt Astrograph 11″ |  IC 434 HORSEHEAD NEBULA, by Jarrett Trezzo Telescopes: Celestron Rowe-Ackermann Schmidt Astrograph 11″ |
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 QHY268 M/C PH has a zero amplifier glow. In addition the dark current is only 0.0005e/pixel/sec @ -20C.
QHY268 M/C PH Back-Illuminated Camera
The QHY268 M/C PH is a new generation of back-illuminated CMOS cameras with true 16-bit A/D and 3.76um pixels. This new Sony sensor is an ideal CMOS sensor exhibiting no amplifier glow. 16-bit A/D gives a high-resolution sampling of the whole full well range. Digitizing 0-65535 levels yield a smooth image with a continuous gradation of greyscale levels.
| Readout Mode is a new function for new QHY Cameras. Different Readout Mode has different driver timing etc and causes different performance results. Each readout mode has its advantage and disadvantages. QHY600 currently has three readout modes. And in the future QHYCCD may add more modes. The Readout mode is currently supported by QHY ASCOM Camera Driver and SharpCAP software and the N.I.N.A software. You can find the list box in the software.
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