As photographer Chase Jarvis once said, "The best camera is the one that's with you." And, thanks to iPhone and Android smartphones, many folks always have a camera with them. These cameras are constantly getting better—the original iPhone shipped with a 2-megapixel camera, while the newest iPhone 5 sports an 8-megapixel shooter.
Still, there's always room for improvement. If you want to take your iPhone photos to the next level, check out this collection of must-have iPhone camera accessories. For Android phone users, there's even a set of universal external lenses and other products for your handset.