|
Manav,
5 minutes at ISO-400 is a good starting point.
Ignore the light pollution -- you're still capturing data through it. When it comes time to set your black and white points in post, select a region of the image void of objects and assign a black value of something like 25,25,30. This will give you a dark background with a very minute blue cast to make the sky appear natural. You shouldn't have to set your white point then, unless you're into G2V calibration.
This should at least give you a starting point to further enhance your image in post.
For flats, take an exposure and observe the histogram on the LCD preview. You're looking for a histogram which peaks somewhere between 1/2 to 2/3rds along the x-axis of the histogram.
H
|