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QHY 294 C Cooled Color CMOS Telescope Camera


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Product Details

  • 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 condensation.

    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.


    Vendor Number: TBD

  • specifications

    ADC14 bit
    Back Focus11.5 mm
    Camera ConnectionFemale M42x0.75
    Color or MonoColor
    Delta T35C
    Dynamic Range13.2 Stops
    Full Rez Frame Rate16.5fps
    Full Well64.067ke
    Max Frame Rate290fps
    Mega Pixels10.3 mp
    Peak QE75%
    Pixel Array3704 x 2778
    Pixel Size4.63 microns
    Read Noise6.83e
    Sensor Diagonal21.4 mm
    Sensor TypeCMOS
    SensorSony IMX294CJK
    Weight1.4 lbs

Product Reviews

Customer Reviews
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Filter Reviews:
    Kurt A.
    United States United States

    A great camera indeed

    The issues brought up in reviews have been fixed and now you can experience this camera the way it was meant to be enjoyed. Feel free to check my Instagram @gorilla_astro for some shots I took with this lil guy. A killer qe for an osc and a one gain to rule them all. The pixel well depth truly shows as I rarely now worry about star bloat and don't have to worry about making the stars smaller in post processing like I have with other CMOS sensors. Team this guy up with a short refractor and a light mount and you have a killer travel setup. There was once a time I wouldn't recommend an osc to people wanting a cooled astro cam but now the qhy294c has changed my mind. The new osc cameras being released are really making some huge improvements in Astrophotography.


    Good hardware only problem with some SDK

    The SDK software with Matlab does not work for this model.