Astronomy Specialist



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The QHY600L comes with all adapters necessary to reach 55mm backfocus, required by most correctors/reducers. 

The QHY 600L - Lite version is a full-frame CMOS cooled astronomy camera containing the monochrome version of the Sony IMX455, a revolutionary full-frame back illuminated sensor which has a QE above 90% and true 16-bit A/D.

This translates to a dynamic range of 14 stops. The pixels have a size of 3.76 µm which is excellent for telescopes with different focal lengths.

The large sensor has a resolution of more than 61 Megapixels allowing to crop, scale and print the frames in large formats.

The full well capacity at full resolution is above 51,000 e-, it rises above 204,000 e- at binning 2x2 without excessively reducing the resolution and remaining above 15 Megapixels.

QHYCCD 600L Mono CMOS camera extended NIR quantum efficiency


Differently from the other cameras, QHY developed three different capturing modes for the 600L:

  • #0 Photographic Mode: this is the standard mode that can be used for general astrophotography. The readout noise rapidly drops between 25 and 26 (2.5e- at gain 26), ideal for long focal length telescopes where a longer exposure time is required. The trade-off at gain 26 is a lower full well capacity at 25,000 e-. In fast telescopes (f/2.2 - f/4) the gain can be set to zero to use the maximum full well capacity (51,000 e-).
  • #1 High Gain Mode: the readout noise is much lower at 3.5e- between gain 0 and 55. This mode is ideal for narrowband imaging where long exposures are generally required. Above gain 55, the readout noise drops even further at 1.5e-.
  • #2 Super Full Well: ideal for objects with bright stars or strong contrasts. The full well capacity is at the highest level along the entire gain range.
  • #3 Extended Full WellThe advantage of this mode is that it has the same full well value and system gain as the #2 mode, but the read noise is reduced by about 1.3 times.

Unlike DSLR cameras, the QHY 600L offers true RAW image output that only records the signal without artefacts, noise reduction or hot pixel removal, which can undermine post processing and final quality of the image.

The two-stage TEC cooling brings the sensor temperature 35C° below ambient for low noise imaging even in warm climates. The dark current at -20°C is only 0.002 electron/pixels. In addition, QHYCCD employs unique thermal noise control to reduce noise to a very low value without affecting the integrity of the raw image. The QHY 600L employs a full anti-dew technology for both CMOS sensor glass and the optical window to avoid condensation or ice forming.

The 1GB DDR3 memory buffer is especially useful for when USB traffic is high or your computer is occupied with other processes.

In order to avoid halos around bright stars, the QHY 600L has an AR coated optical window on both sides rather than the common IR/UV cut coating. Also, the sensor protection glass is AR coated to maximize light transmission and minimize internal reflections.

Every QHY 600L camera is carefully calibrated with a high-precision axis measurement device. Orthogonal placement of the sensor in the camera body is guaranteed to be flat to the image plane with a precision better than +/-20µm from edge to edge. This is a huge advantage especially in fast telescopes such as F/2.8-F/4 astrographs which are very sensitive to tilted sensors.

The QHY 600L has zero amplifier glow no matter how long the exposure is.




The Horsehead nebula - Wu Zhen, Celestron RASA11, QHYCCD QHY600, Antlia Ha 3.5nm


Sensor Sony IMX455 back illuminated - MONOCHROME
Resolution 61.17 Megapixels, 9576 x 6388
Pixel size 3.76 µm
Sensor size Full frame - 24mm x 36mm (43.27mm diagonal)
Quantum efficiency >87%
Exposure range 40µs-3600s
Read noise 3.7e- at high gain ; 1.0e- at lowest gain (standard mode)
Dark current 0.0022e-/pixel/sec @ -20C
Full well capacity 51,000 e-
Bit rate Native 16 bit ADC
Frame rate 2.5 fps at full resolution (16 bits)
Shutter type Rolling shutter
Cooling ΔT of 35°C Dual Stage TEC cooler
Memory buffer 1 GB DDR3
ROI Supported
Compatibility Mac, Windows, Linux
Optical window AR coated (both sides)
Ports USB 3.0, CFW
Compatibility Mac, Windows, Linux
Back focus 17.5 mm ±0.2mm
Power consumption 40W (at 100% cooling power)
Connections M54 x 0.75 female thread (embedded in camera dovetail adapter)
Dimensions Ø 90 mm; ↨ 112.80 mm
Weight 790 gr (without tilt adapter)
Power supply 12V 3.5A  (2.1×5.5 mm connector)



  • QHY 600L
  • USB 3.0 cable (1.5m)
  • Power cable extender (5.5-2.1mm male jack with locking nut to 5.5-2.1mm female jack)
  • Desiccant Drying Tube (desiccant not included)
  • Camera dovetail to M54 x 0.75 adapter with 3 thumb screws at 120°
  • M54 x 0.75 to 2"adapter (2.5mm optical thickness, M48 x 0.75 internal thread for standard 2" filters)
  • M48 adapter (optical thickness 5mm)
  • M54 spacer ring (optical thickness 7mm)
  • Bags of screws
  • Australian plug power supply 240 to 12V 5A with 5.5-2.1 power jack



    Video presentation of the QHY600.


    Guide to installing QHY and ASCOM drivers for QHYCCD cameras.


    ZWO camera software QHY camera drivers

    ZWO camera software QHY 600L manual

    Welcome Newcomer