QHY268C BSI Cooled Medium Size APS-C Camera

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QHY268C BSI Cooled Medium Size APS-C Camera

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€ 2,383.36 Price excl. German VAT tax (16%): € 2,054.62

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  • High-Resolution cooled, color APS-C Camera uses a 26 Megapixel (6280 x 4210 incl. overscan and optically black pixels) Sony IMX571 Back Iluminated Sensor
  • Effective usable Pixel: 6252 x 4176 (23,5 x 17,5 mm, d = 28,3 mm)
  • QE up to 80%
  • With Native 16-bit ADC and 3.76μm pixels
  • Very low dark current (0.0005e/p/s@-20C, 0.001e/pixel/sec @ -10C)
  • High Dynamic Range 51ke- Full Well at 3.76μm pixels, > 75ke- at extended mode
  • Ultra Low Read Noise 0.7e- at highest gain and 6/6.8 FPS at full resolution readout speed
  • Internal 1/2 GByte DDR3 image Buffer
  • Best Match for Celestron RASA and Hyperstar System
  • Use SONY's Exmor BSI CMOS technology and Electronic Rolling Shutter
  • Firmware (FPGA) Remotely upgrade via USB Port
  • Exposure Time from 30µs up to 3600 Seconds
  • Two-stage Thermoelectric Cooling (35 C below ambient)
  • internal Anti Dew Heater
  • Build-in total 64MByte Flash Memory. 10MBytes 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 .
  • Support for ROI at higher frame rates
  • Telescope Connection M54 x 0.75mm
  • Only Color Version is avaliable
  • Available in two versions:
    • Photographic Model QHY268 PHOTO-C with USB 3.0 interface
    • Professional Model QHY268 PRO-C. The professional version also has two 10 Gigabit Fiber port to support the fiber connection and additional several trigger inputs
  • Please select the appropriate QHY268C camera for further technical details from the Drop-Down menu below

User's review by Jarrett Trezzo:

User's review QHY268C

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€ 2,383.36 Price excl. German VAT tax (16%): € 2,054.62

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QHY268C Technical  Drawings

QHY268C BSI Cooled Medium Size APS-C Camera

Ultra High Resolution, 26 Megapixels, APS-C format

QHY268C is a 26 Megapixel back-illuminated cooled color CMOS camera with 16-bit A/D and 3.76um pixels. The QHY268C is available only in a color model. The sensor size is 23.5mm x 15.7mm (28.3mm Diagonal)

Native 16-bit A/D, 65536 Levels

The QHY268C is the CMOS camera with native 16-bit A/D on-chip. The output is real 16-bits with 65536 levels. Compared to 12-bit and 14-bit A/D, 16-bit A/D provides higher sampling resolution. System gain is less than 1e-/ADU with low noise and no sampling error.

Full Well Capacity of 51ke- and > 80ke- in 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 3.76µm pixels the QHY268C has a full well capacity of 51ke- (44ke- PRO-Version). When binned 2x2 to 7.5µm the full well is 176ke- (only Pro model).

Ultra-Low Read Noise, < 1 Electron at High Gain

The QHY268 PHOTO-C has less than one electron of read noise at high gain and 6 FPS high readout speed. The QHY268 PRO-C has only one electron of read noise at high gain and 6,8 FPS high readout speed.

One electron of read noise means the camera can achieve a SNR>3 at only 3 to 4 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.

Low Dark Current, TE Cooling, Round Body

The QHY268C has extremely low dark current using SONY's Exmor BSI CMOS technology. In addition, the camera uses QHYCCD's proprietary thermal noise reduction technology and 2-stage TE cooling to reduce the dark current noise to extremely low levels.

Best Match for RASA System

The round body and sensor size make this camera ideal for RASA and Hyperstar systems.

Photographic, Professional Models

Choose between two models: The Photographic Model QHY269 PHOTO-C or the Professional Model QHY268 PRO-C. Image quality is identical between the two models.

Fotografisches Modell QHY268C PHOTO: Professionelles Modell QHY268C PRO:
  • USB3.0
  • 6 FPS, full frame, 16-bit images
  • 6.8 FPS, full frame, 8-bit image
  • Support for ROI at higher frame rates
  • USB3.0
  • 2×10Gigabit optical fiber interface
  • Programmable trigger in/out
  • Advanced timing interface for GPS
  • 6,9 FPS, full frame, 16-bit images
  • Support for ROI at higher frame rates
  • Customizable FPGA

Zwei 5m doppelte Glasfaserkabel und zwei optische Glasfasermodule sind im Lieferumfang der Kamera enthalten.

Readout Mode is a new function for the QHY cameras. Different Readout Mode have different driver timing etc and causes the different performance results. Each readout mode has its advantage and disadvantages. QHY600/QHY268C currently has three readout modes. And in future QHYCCD may add more modes. The Readout mode 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.

QHY268C System Gain For All Mode

QHY268C Readout Noise For All Mode

QHY268C Fullwell For All Mode

QHY268C Dynamic Range For All ModeQHY268C Dark Current vs. TemperatureQHY268C QE (Photo Version)

Further detailed information can be found the website of QHYCCD :

If you have any further questions, please send us an email to kontakt (at) baader-planetarium.de.

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