Smart Histogram where to point question
Posted: Thu Sep 13, 2018 7:15 pm
Hi,
I raised this question in another topic I started in Deep Sky Imaging, but felt it needed a seperate topic for clarification.
In the updated manual, in the Smart Histogram tab, under Measuring Sky Brightness, it states "you should point the telescope at an area of sky without nebulosity or many stars to get a good measurement."
What it doesn't state in the manual and what my question is - after you've done this and obtained and entered a value in e-/pixel/s (for example say 5) in the sky brightness dropdown selection, would it be better to:
1) Apply the Exposure/Gain setting recommended from the patch of sky used above that also gave you 5e-/pixel/s for your sky brightness? Use these values for your target, which is in a different part of the sky (either close to before or farther out)?
or
2) Slew to the target that you will be imaging for the night and get new Exposure/Gain recommendations using the manually entered 5e-/pixel/s for your sky brightness you got earlier?
Apologies if this is blatantly obvious to some, but in my mind it would be better to go for option 2, as it would generate exposure/gain recomendations based on your target and not a relatively empty patch of sky.
I will however, leave the verdict to those who know better than me.
Many thanks
Minos
I raised this question in another topic I started in Deep Sky Imaging, but felt it needed a seperate topic for clarification.
In the updated manual, in the Smart Histogram tab, under Measuring Sky Brightness, it states "you should point the telescope at an area of sky without nebulosity or many stars to get a good measurement."
What it doesn't state in the manual and what my question is - after you've done this and obtained and entered a value in e-/pixel/s (for example say 5) in the sky brightness dropdown selection, would it be better to:
1) Apply the Exposure/Gain setting recommended from the patch of sky used above that also gave you 5e-/pixel/s for your sky brightness? Use these values for your target, which is in a different part of the sky (either close to before or farther out)?
or
2) Slew to the target that you will be imaging for the night and get new Exposure/Gain recommendations using the manually entered 5e-/pixel/s for your sky brightness you got earlier?
Apologies if this is blatantly obvious to some, but in my mind it would be better to go for option 2, as it would generate exposure/gain recomendations based on your target and not a relatively empty patch of sky.
I will however, leave the verdict to those who know better than me.
Many thanks
Minos