QHYCCD QHY183C Cooled Color CMOS Telescope Astrophotography Camera

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The QHY183C is a one-inch, 20 Megapixel back-illuminated color CMOS Astrophotography Camera.  The pixel size is 2.4um, yielding high-resolution with modest size telescopes.  The camera is capable of producing 15FPS@20 Megapixels.  It has a two-stage TEC that cools the sensor to -40C to -45C below ambient.  The ADC is 12-bit / 16-bit with 1e- read noise!  The computer interface is USB 3.0 and exposure times can be set from 50us to 3600sec.

Sony's Image Sensor Exmor R is a back-illuminated CMOS image sensor with improved sensitivity and noise reduction - the key factors to enhancing image quality, while radically realigning their fundamental pixel structure from front-illumination to back-illumination. It retains the advantages of CMOS image high-speed operation while dramatically improving sensitivity.

The QHY183C has a 128MB DDR Memory Buffer.  A QHY183C 16-bit image is about 40MB, so 128MB of memory can easily buffer a full frame for transfer to the computer using QHY183C software with native single-frame shooting function, instead of intercepting a frame from a continuous video transmission.  This makes data transfer to the computer stable and reliable because there is no USB bandwidth or busy CPU problems.

The QHY183C utilizes the Anti-Dew features common to the QHY COLDMOS cameras.  A heated optical window prevents exterior dew from forming, and the CMOS chamber has a desiccant plug socket to prevent moisture from forming on the sensor at cold temperatures.

The QHY183C incorporates QHY's Anti-AMP Glow technology to significantly reduce typical CMOS amplifier glow to a minimum, allowing excellent calibration by subtracting a dark frame.

What's in the Box

  • QHY183C camera
  • USB 3.0 cable(1.5m)
  • Self-locking power cable
  • 6-pin guide cable
  • Car power adapter
  • Drying tube
  • Desiccant
  • M42/2" adaptor(Maximum diameter: 56mm)
  • Driver download card
  • Inspection report




Model QHY183M Monochrome / QHY183C Color
Sensor SONY IMX183 Back-Illuminated CMOS
AR Coating On Sensor Yes
Pixel Size 2.4um x .4um
Effective Pixel Area 5544 x 3694
Effective Pixels 20 mega 
Effective Image Area 13.3mm x 8.87mm
Full well 15.5ke-
Peak QE 84% (Monochrome)
AD Sample Depth 12bit (output as 16bit and 8bit)
Sensor Size Typical 4/3inch
Full Frame Rate Full Resolution 19FPS
ROI Frame Rate 4096 x 2160 4K HD Video 31FPS
Readout Noise 2.7e-@lowest gain   1.0e@high gain
Dark Current 0.0024e/pixel/sec @ -15C
Exposure Time Range 50us-3600sec
Anti-Glow Control Yes
Shutter Type Electric Rolling Shutter
Computer Interface USB 3.0
Built-in Image Buffer 128MByte DDR2 memory
Cooling System Dual Stage TEC cooler (-40C below ambient)
Anti-Dew Heater Yes
Telescope Interface M42/0.75
Optic Window Type AR+AR High Quality Multi-Layer Anti-Reflection Coating (For color camera user need to add a UV/IR filter in the light path)
Back Focal Length see the setup combination table in the bottom of this page
Weight 650g

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