Three DSLR cameras: The Sony Alpha 77, Nikon D7000 and Canon EOS 5D Mark III © 2012 DSLRbuyer

Things use to be simple. In the good old days of 35mm either a camera was a Single Lens Reflex camera or it was not. Now with digital things have got a bit blurred if you pardon the double meaning! Here we explain the variations in DSLR Cameras.

To start with the area that captures the image is not always the same size. You might expect it to be the same as the old 35mm film i.e. 24mmx36mm. In fact there are two basic sizes that are used. The usual image area is smaller with some of there top of the range camera being ‘full frame’.

As the image is picked up by a chip rather than film the complexes of making a chip the full 35mm size come into play. The manufactures decided on a chip 2/3’s the size. Full size chips where eventually made but even today they cost a lot more to make.

The Sony Cameras use these 2/3’s size pick-up but have an electronic viewfinder so strictly are not DSLR Cameras but do work in a similar way.

There are others cameras which do away with the traditional mirror but still use similar size chips. This maintains the quality and makes for a smaller camera.

With all of these DSLR cameras the lens are interchangeable and this is where you should be think before you jump.

Nikon and Canon DSLR Cameras follow on from he 35mm film days. This means if you change camera and keep to the same brand you be able to use your old lens. This is particularly useful given the costs of some of the good quality lens.

So you can gather it is a good idea to do a little research and this is where we hope we can help you out.