Before this December it had been a long time since I had to shoot indoors. To be quite honest, I'm not a huge fan with photographing indoor wedding simply because it's harder to control your light. I feel much more comfortable relying on the environment for light. Recently I read an article from MCP Actions regarding some quick tips for shooting indoors. The basic components they talk about is ISO, shutter speed, and f-stop. They always have great articles and suggestions that bring up ideas for me to share with you.
Though they went covered a wide range of ways to deal with it, I'm only going to touch on a few.
1. Shoot with a high ISO setting. Keep in mind that the higher the ISO setting, the grainer they will be. Below is an example of the grain on a photo straight out of the camera (SOOC - not edited). I've also zoomed in to give you a better idea.
Notice it isn't as crispy?
Though this isn't something that most photographers enjoy dealing with. You can always take advantage of the situation and turn it into more of an artsy photo. You can increase the contrast and turn it into a fine art photo (see some small tweaks below).
2. Use lenses with fast apertures. The photo above was taken at an f4 but you can buy lenses that go as far as f2.
3. Slow down your shutter speed. The photo above was taken at 1/80 which is still pretty fast. Since I wasn't using a tripod at the time it was the slowest I could use without really effecting the image. The rule of thumb is 1/60 and slower should be used with a tripod.
4. One other strategy (which I don't use much) is to shoot in RAW. JPEG will compress and save your photo as is, but if you shoot in RAW you have more flexibility to fix and change exposure during post production. I personally do not use RAW because it takes up so much space. However, in a lower light situation it gives you a lot more wiggle room to adjust exposure.
MCP Actions uses this diagram to help explain the relationship between ISO, f-stop, and shutter speed. They also give some examples of what you can do in order to "fix" an exposure issue with low light or how to "embrace" it.
Whole-heartedly understanding the triangular relationship between ISO, Aperture and Shutter Speed, and the effects on each other and what they will create. Here are some relationship examples of the three:
Any photo tips you would like to share about shooting in low light?