Product Overview
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 welll
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.
2GB Image Buffer
In order to get smooth uninterrupted high speed transfer of data, the QHY268M/C has a large 2GByte DDR3 memory buffer.
USB3.0
USB3.0 interface. 6.8FPS
Best Match for HyperStar System
The small pixels and round camera body of QHY268M/C plus the APS-C size sensor make the QHY268M/C an ideal match for the HyperStar and RASA optical systems.
Specifications
QHY268M/C CMOS CAMERA SPECIFICATIONS | |
| Model | QHY268M/C |
| Image Sensor | SONY APS-C CMOS Sensor IMX571 |
| Sensor Type | Back Illuminated (BSI) |
| Pixel Size | 3.76um x 3.76um |
| Sensor Surface Glass | Multi Layer AR coating |
Effective Pixels | 26 Megapixels |
Effective Image Area | 6280*4210 (includes the optically black area and overscan area) |
Full Well Capacity | 51ke- 75ke- or above in extended full well mode |
A/D | Native 16-bit (0-65535 greyscale) A/D |
| Full Frame Rate | USB3.0 Port: 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 |
| Read Noise | 1.1e- High Gain, 3.5e- Low Gain (5.3e- to 7.4e- in extended full well mode) |
| Dark Current | 0.0005e/pixel/sec @ -20C 0.001e/pixel/sec @ -10C |
| Zero Amplifer Glow | Yes |
| Exposure Time Range | 30us - 3600sec |
| Firmware/FPGA upgrade | Fully Support. via Camera USB port |
| Shutter Type | Electronic Shutter |
| Computer Interface | USB 3.0 |
| Built-in Image Buffer | 1GByte DDR3 Memory |
Cooling System | Two-stage TEC cooler Less than 1S lower than ambient temperature -30C in continuous mode More than 1S continuous mode or lower than ambient temperature -35C in single frame mode |
Anti-Dew Heater | Yes |
| Humidity Sensor* | QHY268M:Yes QHY268C: NO |
| Center inclination adjustment * | Yes |
| Extended Fullwell Mode* | Yes |
| 2CMS Mode* | Yes |
Telescope Interface* | QHY268C: M54/0.75 (with CAA)and M48 (with standard adapter) QHY268M: Support M54 and M48 (with standard adapters ) |
| Optic Window Type | AR+AR High Quality Multi-Layer Anti-Reflection Coating |
Back Focal Length* | QHY268C: 17.5mm (without CAA) This intercept does not include CAA. If CAA is used, it increases by 6mm (23.5mm total). Please check the mechanical drawing below for details. Note: The 17.5mm (±0.3) rear intercept does not include the thread. After the central inclination adjustment ring is added, the M54*0.75 internal thread is included. QHY268M: 12.5mm (with CAA) If used with the QHY filter wheel, the actual calculated intercept is 12.5mm. The actual BFL (the intercept from the CMOS chip to the top of the camera) is 14.5mm. Since most uses will match CFW with monochrome cams, please take 12.5mm as major reference. Check the mechanical drawing below for details. Note 14.5mm rear intercept does not include adapter thread, which must be used with adapters of various sizes through the top 6 screw holes. |
Weigth | QHY268M:855g QHY268C: PH Version:780g Pro Version:980g |
Reference Price | QHY268M: USD2399 QHY268C: USD2099 QHY268Pro (Scientific) : TBD, Under Development |
*Different Top Design, CAA and BFL
QHY268M
