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Benefiting from the back-illuminated structure, the area around the photo-diode is reduced so that for a given pixel size the BSI sensor provides a greater full well capacity compared to a front illuminated sensor. The QHY294M Pro has a full well capacity of nearly 65,000 eletrons with 4.63um x 4.63um pixels, almost the same as an interline CCD camera with 9um pixels.
The IMX492 chip has 46.8 million 2.315um pixels, which Sony 2x2 bins on-chip to create the sensor's advertised 11.7 million 4.63um pixel array. The QHY294 Pro series camera is capable of locking and unlocking the on-chip binning to provide two readout modes. The first mode reads the sensor "locked" mode to produce 11.6mp images with 4.63um pixel size and 14 bits per pixel. The second read mode unlocks the binning to produce 46.8mp images with 2.315um pixel size at 12 bits per pixel.
Preliminary tests indicate that this sensor has an outstanding performer with extraordinarily high QE, low read noise, and low dark current. The QHY294M Pro has 6.8 to 6.9e- read noise at the lowest gain, 1.6e- read noise near unity gain, and 1.0e- read noise at highest gain, with great dynamic range!
The QHY294M Pro 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 CMOS chamber is protected from internal humidity condensation. QHY294M has a short back focal distance allowing for flexibility in setting up your optical train.
- QHYCCD QHY294M Pro mono camera
- T2-50,8mm adapter
- USB 3.0 cable
- 220V power unit
In this table we have summarized main features of QHYCCD's cooled CMOS cameras to allow you to easily compare and choose the best one based on your telescope.
|Type:||Camera CMOS raffreddata|
|Resolution||4164 x 2796|
|Sensor dimensions (mm)||19,3 x 13|
|Sensor diagonal (mm)||23.2|
|Pixels dimensions (µm)||4.6|
|A/D converter||14 bit|
|Cooling||-35°C rispetto a T ambientale|
|Readout Noise (e-)||1e- at high gain|
|ST4 integrated autoguide port||No|
|Telescope interface||Filetto T femmina (42x0,75)|
|Connection to PC||USB 3.0|
|Power||External 12V 5A|