As most of you know, I am moving from a
I am trying to understand exposure time to get things right or close without saturating stars that require lots of post processing to mitigate.
I am an Astrophotography Tool user and connecting a dedicated astronomy camera brings up a whole new set of tools. One tool that I was just reading about is the Pixel aid.
I know that some of you use
The
Looking at the FW graphics for the camera below, I see that Full Well (e-) should be about 16000 shooting at 100 gain.
Looking at the GAIN graphic at 100, I see that the there is 1 e- for each ADU.
So, does that mean that shooting at 100 gain, I should have a full well of 16000 and should expose for a time that measures the ADU of bright stars at no greater than 16000?
I think that something is flawed with my thinking, because I loaded an image from a few nights ago where I mistakenly had the gain at 300. I measured the whole image with the Pixel Aid and it showed that my maximum image (as a whole) is 65000.
If I chose to measure a single pixel, the value hits 65000 when I place the crosshairs on a bright star center.
Is there something wrong about what I think that this means, or did I grossly overexpose the stars in the image?
As you can see in the image above, the Histogram in the lower left side of the screen looks good (to me).
I appreciate any advice/comments! Thanks!