All about the camera opening for iPhone 4S cases
If you are shopping for a case for your 4S, make sure you do not buy a case for a 4 that has 2 tiny openings for the camera. The 4S case redesigns are going to larger oval openings because the tiny ones can really affect the pictures with the new camera lens system. We have two white 4S phones and the effect is quite noticeable. Check out the pictures of case differences at Otterbox, or how the Candyshell 4S cases are made.
(I was sold an Otterbox Commuter 4 instead of 4S case at a store that did not know any better)