mine does and my first one did too(it died from being dropped)
This is normal... they all do. It's the lens warming up I believe. Basically someone, with much more camera knowledge than I, said that it's basically the lens 'extending' itself, similar to how a traditional camera lens extends out from the camera.
Yup, Totally normal sounds....
A gun in the hand is better than a cop on the phone.
Only the Skilled Survive
A computer lets you make more mistakes faster than any invention in human history - with the possible exceptions of handguns and tequila.
Drill Sergeant Frick's Rules For Un-armed Combat.
1. Never be unarmed.
2. See Rule #1
USMC rule # 23 of gunfighting: Be polite, be professional, but have a plan to kill everyone you meet.
You should breathe a sigh of relief when you hear this noise. The camera has physical auto-focus, the first of its kind in a phone. This is why you can get incredibly sharp pictures with your Droid.