QHY4040/QHY4040PRO uses the GSENSE4040 sensor, it has a 36.9mm x 36.9mm square sensor with 9.0um pixels in a 4k x 4k array. It has 36.9*36.9mm big image area. 1.57 times larger than full-frame format. With higher image quality and fast readout speed, it is an idea alternative for the KAF09000 and KAF16803 based camera.
Unlike the high readout noise of CCD sensor under high readout speed, even on ten frame per second, the FSI has only 4e- read noise(at gain32) and the BSI has 2.3e-.
The QHY4040 has a USB3.0 high-speed interface with up to 5GB of bandwidth. QHY4040PRO has both USB3.0 and 2*10Gbps Filber. 2*10Gbps fiber port support max 20FPS@16bit output. USB3.0 support max 20FPS@8bit and 10FPS@16bit ouptut. Camera supports different readout clocks and 8FPS, 12FPS, 13.3FPS, 16FPS, 18FPS,20FPS frame rates.
The QHY4040/PRO has 2-stage TE Cooling that reduces the sensor temperature to -30 °C to -35 below ambient. TE cooling significantly reduces dark current and produces cleaner, lower noise images over long exposures. QHY4040PRO has the water cooling version to get -40C below ambient.
