Product Description
QHYCCD QHY268M CMOS 26mp Monochrome Cooled Camera
High Resolution
26 Megapixels
APS-C format
The QHY268M/C is a cooled, back-illuminated, CMOS camera based on the Sony IMX571 sensor with native 16-bit A/D and 3.76um pixels. The BFL of QHY268M is 12.5mm under a new front design.
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 QHY268M/C has a superb full well capacity of 75ke-.
Ultra Low Read Noise
1.1e- Noise at High gain
3.5e- Noise at Low Gain
The QHY268M/C 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. Besides, QHY268M/C has a 2CMS mode, the readout noise can be better decreased under the Extended Fullwell Mode.
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 QHY268M/C has zero amplifer glow. In addition the dark current is only 0.0005e/pixel/sec @ -20C.
Specifications
| Name | QHYCCD - QHY268M CMOS 26mp Monochrome Cooled Camera |
|---|---|
| Manufacturer | QHYCCD |
| Model | QHY-QHY268M |
| A/D Converter | Native 16-bit |
| Backfocus Distance | 12.5mm (±0.3 |
| Computer Interface | USB3.0 |
| Cooling | Dual Stage TEC cooler (-35C below ambient) |
| Dark Current | 0.0005e/pixel/sec @ -20C & 0.001e/pixel/sec @ -10C |
| Effective Pixels | 26 MP |
| Exposure time | 30 us - 3600 seconds |
| Frames Per Second (fps) | Full Resolution - 6.8FPS @8BIT & 6FPS @16BIT, 2048lines - 13.6FPS @8BIT & 11.5FPS @16BIT, 1080lines - 25.4FPS @8BIT & 19.5FPS @16BIT, 768lines - 35FPS @8BIT & 25FPS @16BIT, 480lines - 50FPS @8BIT & 34FPS@16BIT |
| Full Well Capacity | >60ke- to >87ke-at low gain (depending on mode) |
| Gain | <1e- |
| Imaging Area | 6280 x 4210 |
| Memory | 64MByte Flash Memory |
| Pixel Size | 3.76um |
| Read Noise | 1.98e- High Gain and 7.5e- Lowest Gain |
| Sensor | Sony APC-C CMOS IMX571 |
| Sensor Size | APS-C format |
| Sensor Type | Back Illuminated (BSI) |
| Shutter Type | Electronic |
| Telescope Interface | M54/0.75 |