There are important differences between film and digital SLRs. There are more and more choices when it comes to digital SLRs. Prices have declined sharply in recent years, driving growth in this market.

SLR (single lens reflex) cameras differ from point-and-shoots in many ways. First, they provide advanced controls. They allow you to adjust shutter speed and aperture size. And that's just the beginning. SLRs provide many options for getting the best photos possible.

SLR basics

 There are a few types of digital SLRs, so let's start with the basics. First, there are SLR-style cameras. They're not true SLRs, but they provide many of the same options.

So what makes a true SLR? When you look through the viewfinder, you see exactly what the camera will capture. That's thanks to a mirror inside the camera. When you press the shutter release, the mirror flips up. The sensor then captures the image.

A few digital SLRs have fixed lenses. The inability to change the lens is very limiting. Presumably, you're buying an SLR because you're serious. Why limit yourself with a fixed lens?