Qe Graph & Read Noise - ZWO ASI462 Series Manual

ASI462 Manual
4. QE Graph & Read Noise
QE and Read noise are the most important parts to measure the performance of a camera.
Higher QE and Lower read noise are needed to improve the SNR of an image.
ASI462 has very high QE value at 800-1000nm wavelength (almost 2 times higher than that of
ASI290MC). It's sensitivity in near infrared light regions ranks first among all ASI planetary
cameras.
Read noise includes pixel diode noise, circuit noise and ADC quantization error noise. The lower
the better.
As you can see, the Read Noise of the ASI462 camera is extremely low. The built-in HCG mode
can even more reduce the read noise at high gain and keep the same wide dynamic range for this
camera as at low gain. When the gain is 80, the HCG mode will be automatically turned on.
Additionally, the read noise is as low as 0.47e while the dynamic range can still be close to 12bit.
Depending on your target, you can set the gain lower for higher dynamic range or set the gain
higher for lower noise.
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