I know, it's not about the HVX200. But everybody who's working with some kind of digital camera should understand how these things work and how they produce pictures. It may help you to get the best results and control over your images.

Since many had never heard about diffraction and airy disks (me neither) when Bob Diaz came up with this after the 4-cam-shootout, you should read these articles now. They are well written and have a lot of examples and pictures.

http://www.cambridgeincolour.com/tutorials.htm