Elph 310 HS on/off button not recessed
The on/off button works a bit too well! Compare the 310 to any other Elph (or any other compact camera for that matter). The 310 is the only compact camera I've ever seen where a relatively large on/off button is not recessed below the surrounding surface or a protective ring. It's easy to dismiss it as a small flaw, until the one time that the lens extends inadvertently and jams.