These are all great! Thank you. I do like the centered one better.
As for the concept of flipping it vertically so that it looked like a camera, the pespective is off a bit. See the images in the links for examples of the perspective. And I don't mean make the shape exactly like the camera, I like keeping it simple and stylized like you have it, but maybe just shift things around so that it reminds the viewer of a camera...
http://www.godwincompany.com/CameraClipArt.jpghttp://openclipart.org/media/files/flomar/4746