Quote:
Originally Posted by Slawomir
On the contrary, I think when assessing sensitivity of any camera, we must consider not only sensor's QE but also noise injected by the camera. Sensitivity determines the achievable SNR which is of key importance in astrophotography, and SNR depends on the camera's capacity to have the signal stand out from the surrounding noise. All else being equal, a camera with higher read noise will have a lesser capacity to detect wanted signal (lower sensitivity), as opposed to a camera with a low read noise that will readily capture faint signal (higher sensitivity). That's how I see it anyway  |
This is only true if you don't overcome read noise. Take the 16803 which has a very similar QE to the ASI1600 but a RN of 8e- compared to the variable RN of the 1600. As long as they both overcome the read noise, their sensitivity is more or less identical. The 16803 will have to do longer subs to reach that point but it has MASSIVE wells to be able to accomodate for that.