I've been taking digitial photos of my automotive body and paint work and would like higher quality photos for my website. I use a Pentax point-and-shoot 8 megapixel camera. It's good, but the pictures lack detail, and I have a hard time focusing on particular areas on the viewfinder. What advantages does an SLR camera offer? Here's an example of a before/after I took. Both photos lack detail in the repair area.