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Based on the Sony IMX294C, the QHY294C camera has an 11.6 Megapixel, 4/3-inch, back-illuminated, cooled, color CMOS sensor with
14-bit A/D, 1.6e- read noise near unity gain and 1e- read noise at highest gain. At lowest gain the read noise is 6.8e-. The QHY294C full
well capacity is nearly 65,000 electrons with 4.63um x 4.63um pixels, almost the same as an interline CCD camera with 9um pixels.

High Sensitivity
The QHY294C has high QE, with a peak QE in the green estimated at 75% or more and nearly 70% at H-alpha. The high QE, medium
sized pixels and extraordinary low read noise and low dark current all combine to produce a camera with very high sensitivity, perfect
for astronomical imaging. In addition, the back-illuminated structure provides greater full well capacity and therefore greater dynamic
range than front illuminated sensors with similar architecture.

Dual Gain Auto Switch - HGC/LGC MODE Boosts Low Light Performance
The QHY294C's CMOS sensor has a dual gain mode, HGC (high gain) and LGC (Low gain). The QHY294C will switch the two modes
automatically when the gain is set to 1600 you will get the benefits of the ultra-low read noise (1e- to 1.6e-) of the HGC mode and a
full well capacity of about 14.5ke- at the switch point setting.

Super Low Dark Current 0.005e-/p/s @ -20C
The QHY294C uses QHYCCD's proprietary low dark current control technology. This technology significantly reduces the dark current
noise in our CMOS cameras. The QHY294C has super low dark current as a result, lower than many CCD cameras, allowing for very long
exposure times

High Resolution 14-bit Frame Rates
The QHY294C produces 16.5 frames per second at high resolution (11.6 MP) with 14-bit A/D. Higher rates are achieved for regions of
interest, for example, 21 FPS at 4K resolution, 41 FPS at 1080 lines, 87 FPS at VGA, 156 FPS at 240 lines, etc.

256MB DDR3 Image Buffer
The QHY294C has an internal 256MByte high speed DDR3 image buffer. This is more than enough for one frame and it significantly
reduces any issue of lost frames due to a busy computer CPU or slow USB communication packet errors.

Anti-Dew Technology
The QHY294C benefits from more than a decade of cooled camera design experience. QHYCCD has implemented full dew control
solutions. The optical window has a built-in dew heater and the sealed CMOS chamber is protected from internal humidity

Flexible Adapters
The QHY294C has the same body design and mechanical interface and the QHY163. It has a short back focal distance allowing the use
of QHYCCD's 0.5mm-27mm spacers (step size 0.5mm) for flexibility in setting up your optical train.


Model QHY294C
AR Coating On Sensor Yes
Pixel Size 4.63um*4.63um
Effective Pixel Area
Effective Pixels
11.6 mega 
Effective Image Area
AD Sample Depth
14bit (output as 16bit and 8bit)
Sensor Size
Typical 4/3inch
Full Frame Rate and ROI Frame Rate
4164*2796 16.5FPS@14BIT
2160lines(eg.4164*2160,4096*2160) 21FPS
1080lines(eg.4164*2160,1920*2160) 41FPS
960lines(eg.4164*960,1280*960) 46FPS
768lines(eg.4164*768,1024*768) 56FPS
480lines(eg.4164*480,640*480) 87FPS
240lines(eg.4164*240,320*240) 156FPS
100lines(eg.4164*100,240*100) 290FPS

*Note:QHYCCD has optimized the cmos drive freqency and limit the max frame rate. The CMOS sensor may not work under the maxium frequency to ensure the better noise performance. If you need the customized higher frame rate version please contact QHYCCD.
Readout Noise 1.6e-1.0e@HGC moe  6.8-4.2e@LGC mode
Dark Current 0.005e/pixel/s@-20C    0.007e/pixel/s@-15C 
Exposure Time Range 60us-3600sec
Anti-Glow Control Yes
Shutter Type Electric Rolling Shutter
Computer Interface USB3.0
Built-in Image Buffer 256MByte DDR3 memory
Cooling System
Dual Stage TEC cooler(about -30 to -35C below ambient)
Anti-Dew Heater
Telescope Interface
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

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