QHY268 PH Mono Camera
QHY
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This camera Is normally shipped to order with a delivery time of 2-4 weeks.Please contact us to confirm current pricing and delivery times.
Overview
The QHY268M 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 high-resolution sampling of the whole full well range. Digitizing 0-65535 levels yields a smooth image with a continuous gradation of greyscale levels. The QHY268C is a cooled mono, back-illuminated, CMOS camera based on the Sony IMX571 sensor with native 16-bit A/D and 3.76um pixels.
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.
Full technical details can be found at
https://www.qhyccd.com/astronomical-camera-qhy268/

QHY268M PH Specifications
Attribute | Details |
---|---|
Model | QHY268M/C PH |
CMOS Sensor | SONY IMX571 |
Mono/Color | Both Available |
FSI/BSI | BSI |
Pixel Size | 3.76μm x 3.76μm |
Effective Pixel Area | 6252 x 4176 |
Total Pixel Area | 6280 x 4210 (includes optical black area and overscan area) |
Effective Pixels | 26 Megapixels |
Sensor Size | APS-C |
A/D | Native 16-bit (0-65535 greyscale) A/D |
Full Well Capacity | Standard Mode: 51ke- Extended Full Well Mode: >75ke- |
Frame Rates |
Full Resolution: 6.8FPS@8bit, 6FPS@16bit ROI: 2048 lines: 13.6FPS@8bit, 11.5FPS@16bit 1080 lines: 25.4FPS@8bit, 19.5FPS@16bit 768 lines: 35FPS@8bit, 25FPS@16bit 480 lines: 50FPS@8bit, 34FPS@16bit |
Readout Noise | 1.1e- to 3.5e- (5.3e- to 7.4e- in Extended Full Well Mode) |
Dark Current | 0.0005e-/pixel/sec @ -20℃ 0.001e-/pixel/sec @ -10℃ |
Exposure Time Range | 30μs - 3600sec |
Recommended Gain | 30 (PH Mode, or Extended Full Well Mode) 56 (High Gain Mode) |
Amp Control | Zero Amplifier Glow |
Shutter Type | Electronic Rolling Shutter |
Computer Interface | USB3.0 |
Built-in Image Buffer | 1GB DDR3 Memory Buffer |
Cooling System |
Dual Stage TEC cooler: - Long exposures (> 1 second) typically -35℃ below ambient - Short exposures (< 1 second), high FPS, typically -30℃ below ambient (Test temperature +20℃) |
Optic Window Type | AR+AR High Quality Multi-Layer Anti-Reflection Coating |
Telescope Interface | Support M54 or M48 (combined with adapters) |
Back Focal Length | 14.5mm (±0.2) |
Anti-Dew Heater | Available |
Humidity Sensor | Available in QHY268M only |
Firmware/FPGA Remote Upgrade | Available via Camera USB port |
Weight | 810g |
Let customers speak for us
from 126 reviewsI've used this on my 8" ASTRONZ Cassegrain and it gives a fairly sharp image across most of the field of view. Being a long focal length telescope at 2436mm I wanted an eyepiece that gives me that little extra field of view when compared to my other 30mm eyepiece.

We were looking to buying a telescope for a while and finally made a decision to get one through Astronz. Contacted Andrew on a Wednesday and wanted to check whether we could get it deliver to Christchurch and luckily Andrew was driving down to CHCH for the weekend and by Friday we had the telescope personally delivered at no cost. It was great to meet Andrew as a person and his wealth of knowledge and genuine passion made the whole experience great. I would highly recommend Astronz

Many more discovery to see through it. Red colour on the moon was lovely to see with.

I had used a non-laser collimator earlier and compared to that this laser unit was far easier to use and took only a couple of minutes.

works way better than the celestron one I was using. I still have the same issue with the thread sticking but no way as bad as the celestron one.

Great addition to my telescope
Makes looking at the sky much easier
Good quality , Great value .

Worked as designed and can be used on other rigs as well

It was exactly what I needed and would have taken me ages to source. Thanks so much for a great service!
Happy with the sales integration with staff. Goods arrived on time and in good order. Looking forward to a bright future dealing with new Astronomy supplier

Exactly what was needed with fast delivery. Great trade!!!

Much better than my old x3 Barlow which was to powerful for my Tasco Galasee 144mm/500mm telescope. Clear and sharp.

Yeah, not bad at all. Nice crisp and clear and far more ergonomic on my dobsonian than a straight through. Price is on point, well worth it.
