Originally Posted By: altman
Hmmm, I personally think the 4->4S camera improvement is bigger than the 3GS->4. The 4S camera is pretty amazing in my experience - low light performance is exceptional and the sharpness is great.

From an Arstechnica article "Can the iPhone 4S replace a "real" digital camera?"


They use some images from a How does the iPhone 4S camera stack-up against other cameras? article elsewhere which also includes comparison shots with a Canon S95 and a 5D MkII.
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Hussein