Been playing around with a DSLR for the last few years. I end up taking quite a few photo's indoors, and have been roped in by relatives to photographing a wedding (scary!) and a couple of big birthday parties.
I bought a external flash with adjustable head, you can swivel it up/down and side-to-side. I reckon it's the best investment for getting decent indoor photos in low . But only if you bounce it off the roof or similar, it's often too bright when used directly.
I recently had a nephews birthday party, and was able to compare:
- my photos with external flash bounced off the roof
- my photos with built-in pop-up flash
- my photos with fast (e.g. f 1.4 - f2.0) and no flash
- other peoples photos from DSLR's with pop-up flash
- other peoples photos with pocket cameras
I was really pleased with how my photos came out with the external flash.
If you're doing a lot of photos inside, or in low , I can highly recommend an external flash unit.