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Cyclops Optics

QHY268M (Mono) PRO Version + PCI-E Grabber Card + Fiber Optics Cable + FREE Custom Adapter + FREE LensPen + Free Insured International Express Shipping


QHY268M (Mono) PRO Version + PCI-E Grabber Card + Fiber Optics Cable + FREE Custom Adapter + FREE LensPen + Free Insured International Express Shipping

Shipping Weight:
5.00 KGS
New release and available. Accepting order now!
Calculated at checkout

Product Description

Introducing the monochrome PRO version of the QHY268 series – QHY268M PRO

Ultimate True 16 Bit Mono APS-C Astro Camera Can Now Be Yours!

Now is your chance to own the high performance, high resolution QHY268M cooled astronomy camera launched by QHYCCD!



Accepting order now! 

(Free Custom Adapter & Insured International Express Shipping by Cyclops Optics)



QHY268M Standard Features:

  • 26 Megapixels Full Frame sensor
  • Monochrome sensor
  • 14.4 stop of dynamic range
  • Backside-illuminated sensor (High QE)
  • 16 Bit Analog-Digital Converter
  • Ultra low 1e- read-out noise
  • Very low dark current
  • USB 3.0

QHY268M PRO Highlights:

  • High-speed fiber optics interface and USB3.0 interface.
  • 2GB DDR3 memory built-in, double the amount of the Photographic version.
  • 6pin GPIO port built-in that enables rich, external, expandable I/O signals as well as a rich resource that allow the user to customize the FPGA inside the camera. Also allows direct connection with QHY GPS Box
  • A longer camera body to accommodate the length of the optical fiber interface.

QHY268M PRO Package Includes:

  • QHY268M Pro
  • PCI-E grabber card for fiber optics connection
  • Fiber optics cable 20m x2 
  • QHY Adapters Set (Combo B1)
  • AC110-240V to DC12V 6A power supply
  • Power cable with self-locking screw
  • USB3.0 Cable 1.8m x1

FREE Cyclops Optics Custom Adapter Fabrication Service


As usual at Cyclops Optics, we offer an exclusive FREE high precision custom fabricated adapter (original: US$150 or above) for our customers to match with your optical system. We will provide you professional opinion when designing the custom adapter to fit your needs.

Cyclops Optics International Service Center for QHYCCD

Cyclops Optics is the official dedicated QHYCCD partner to support ALL global warranty and maintenance services. This secures your reliable purchase and journey of QHYCCD products.


QHY268M Descriptions

High Resolution

26 Megapixels, Monochrome, APS-C format

The QHY268M is a cooled, back-illuminated, monochrome 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

51ke- Full Well at 3.76um

75ke- at Extended mode

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 full well capacity of 51ke-. QHY268C also offer a unique read mode up to 75ke per pixel.


Ultra Low Readout 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.


Backside-Illuminated, High QE

Very Low Dark current, Electronic Shutter

The back-illuminated Sony Exmor sensor has about twice the QE of similar front illuminated sensors. In addition the dark current is only 0.0005e/pixel/sec @ -20C. In general, a fan-blade mechanical shutter may fail after several hundred thousand cycles and is subject to intermittent problems in very cold weather. The advantage of an electronic shutter over a mechanical shutter is high reliability and stability when the observer takes a large number of images.


Model QHY268PRO-M   (Professional Version)
Image Sensor SONY APS-C CMOS Sensor IMX571
Sensor Type Backside 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- (More than 75ke- in extended full well mode)
Native 16-bit (0-65535 greyscale) A/D
Sensor Size
APS-C format
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 Amplifier Glow Yes
Exposure Time Range 30us - 3600sec
Firmware/FPGA upgrade  Fully supported via camera USB port
Non-volatile memory / On camera storage Build-in total 64MB Flash Memory. 10MB user-accessible space for stellar ROI frames for analysis for exoplanet investigation, occultations, atmospheric seeing measurements, focus, optical analysis, etc. Supports 100*100 image x 500 frames; 50*50 image x 4000frames; 25*25 image x 16000 frames; 10*10 image x 250000 frames .
Shutter Type Electronic Shutter
Computer Interface USB 3.0, Fiber Optics Interface via PCI-E Grabber Card
Built-in Image Buffer 2GB 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
Humidity Sensor (inside CMOS chamber)
Center Inclination Adjustment
Extended Full Well Mode
2CMS Mode
Telescope Interface M54x0.75 and M48x0.75 (via bundled adapters)
Optic Window Type

AR+AR High Quality Multi-Layer Anti-Reflection Coating

Back Focal Length 12.5mm (*see below)
Weight 980g


*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 users 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.