Editing Light pollution (section)

==== Effects of light pollution ====
----To get an idea of what the sky looks like in different zones, here is a nifty graphic:

The biggest problem light pollution poses to astrophotos is color. If you are unlucky enough to be in a red or white zone, you will quickly realize that your images are coming out with either a orange or green tint. If you see this '''do not fret'''. Astrophotographers are a smart bunch, and have figured out a number of ways to remove light pollution “gradients” in post processing.

The other problem light pollution creates is that it brightens an image considerably. this can create problems for people with fast scopes, or with people doing long exposures. After taking your first raw frame, check its histogram (most cameras will let you do that on camera.) If your main spike is in the left left 2/3 of the graph, then you are fine. Example: ----- /\ ---- is fine. If your main spike is close to the right wall of the graph, you need to back your exposure time down, lower your iso, or go to a darker site (go down a Bortle scale).
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