QHY 533C Cooled Color CMOS Camera

Brand: QHY


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  • New generation of back-illuminated CMOS cameras with 3.76um pixels
  • Uses the similar series of sensor as the flagship models QHY600 and QHY268
  • Featuring zero amp glow and low readout noise

Product Details

  • With the advantage of low noise and high-speed readouts, CMOS technology has revolutionized astronomical imaging. The QHY533C is a new generation of back-illuminated CMOS cameras with 3.76um pixels in the the same family as the sensors used in the flagship models QHY600 and QHY268, featuring zero amplifier glow, low noise and high sensitivity. The IMX533 is a 9-megapixel, 15.97 mm diagonal (11.29 mm square) CMOS image sensor with 3003 x 3003 pixels at 3.76um, 14-bit A/D and is available in both monochrome and color.


    Back Illumination

    One benefit of the back-illuminated CMOS structure is improved full well capacity. This is particularly helpful for sensors with small pixels. In a typical front-illuminated sensor the embedded wiring structure reflects some of the photons and reduces the efficiency of the sensor. In the back-illuminated sensor the light is allowed to enter the photosensitive surface from the reverse side. In this case the sensor’s embedded wiring structure is below the photosensitive layer.

    As a result, more incoming photons strike the photosensitive layer and more electrons are generated and captured in the pixel well. This ratio of photon to electron production is called quantum efficiency. The higher the quantum efficiency the more efficient the sensor is at converting photons to electrons and hence the more sensitive the sensor is to capturing an image of something dim.

    Zero Amplify Glow

    Like the larger QHY600 and QHY268 cameras, the QHY533 models exhibit zero amplifier glow, no matter how long the exposure.

    Large Image Buffer

    The QHY533 has a large 1 GB image buffer for reliable image transfer at high rates using USB 3.0. The camera produces 27 FPS in 8-bit mode or 18 FPS in 16-bit mode.

    True Raw Data

    Some consumer digital cameras have a RAW image output, but typically it is not completely RAW. Some evidence of noise reduction and hot pixel removal is still visible on close inspection. This can have a negative effect on the image for astronomy such as the “star eater” effect. However, QHY Cameras offer TRUE RAW IMAGE OUTPUT and produces an image comprised of the original signal only, thereby maintaining the maximum flexibility for post-acquisition astronomical image processing programs and other scientific imaging applications.

    Mechanical Design

    Solid Build Quality

    Although the QHY533 has a 1-inch optical format sensor, like the QHY183, it nevertheless uses a similar body size, style and build quality as the larger APS-C sized QHY268 camera.

    Dual-Stage TE Cooling

    In addition to dual stage TE cooling, QHYCCD implements proprietary technology in hardware to reduce dark current to its lowest possible value, less than 1/1000th of an electron at -20C.

    Anti-Dew / Anti-Frost Technology

    Based on almost 20 years of cooled camera design experience, QHY has implemented full frost and dew control solutions. The optical window has built-in dew heaters and the chamber is protected from internal humidity condensation. An electric heating board for the chamber window helps prevent the formation of dew on the external surface of the window and the sensor itself is kept dry with our desiccant tube socket design for control of humidity within the sensor chamber.

    Mechanical Interface

    QHY533C has a different interface design to accommodate its anticipated use. QHY533C comes with an additional adapter for mounting to a tripod. This makes it easier to shoot with a DSLR lens

  • specifications

    Amp ControlZERO AMP GLOW
    Built in Image Buffer1GB DDR3 Memory
    Color or MonoColor
    Computer InterfaceUSB3.0
    Exposure Time Range30us to 3600sec
    Full Resolution 27FPX (8bit) and 18FPS (16bit)
    Full Well58ke
    MP9 to 12 MP
    Pixel Array3080 x 3280
    Pixel Size3.76 microns
    Readout Noise1.3 to 3.4e
    Sensor Size1" Square
    SensorSony IMX533C
    Shutter Type Electronic Shutter
    Unity Gain68
    Weight1.86 lbs
  • included items

    • QHY 533C Cooled Color CMOS Camera

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