by Bill Labus
In this tutorial, we’ll create a detailed camera lens similar to the one used as the logo for Apple’s Aperture photo-editing software. A camera lens is good for a software icon, logo, or just as a graphic for use in any design. Although, the image appears detailed, the process of creating it involves little more than simply layering objects with different fills and gradients to give a three-dimensional illusion.

Tutorial
Source: Vectotuts