Dark Noise as a function of Bin Mode?
Posted: Thu Nov 05, 2020 12:53 pm
Hi Robin,
A curious notion crossed my mind this morning: Does it make sense that Dark Noise should increase with Bin Mode?
Reasoning:
Dark Current is expressed as the number of electrons per pixel per second (e-/px/s).
Dark Noise is the square root of Dark Current.
If your camera has a Dark Current rating of 1e-/px/s then Dark Noise is 3e- after a 9s exposure. That is at Bin 1.
Now at Bin 2, each pixel is the sum of a four-pixel matrix, so Dark Current is 4e-/px/s and Dark Noise is 6e- after a 9s exposure. That is at Bin 2.
Does that make sense, or is it too early in the morning to be entertaining such thoughts?
Thanks,
Brian
A curious notion crossed my mind this morning: Does it make sense that Dark Noise should increase with Bin Mode?
Reasoning:
Dark Current is expressed as the number of electrons per pixel per second (e-/px/s).
Dark Noise is the square root of Dark Current.
If your camera has a Dark Current rating of 1e-/px/s then Dark Noise is 3e- after a 9s exposure. That is at Bin 1.
Now at Bin 2, each pixel is the sum of a four-pixel matrix, so Dark Current is 4e-/px/s and Dark Noise is 6e- after a 9s exposure. That is at Bin 2.
Does that make sense, or is it too early in the morning to be entertaining such thoughts?
Thanks,
Brian