The picture below shows the system of major camera type groups.

Large format

This type of camera is expensive, often reading a price tag of easily over five thousand pounds. It  is often used by the professionals, and produces stunning images.

Medium format

Between Large format, and DSLR, slightly cheaper than a large format, but still capable of stunning images

DSLR/ SLT

Produce very good pictures, but is not competition for Medium or Large format cameras

EVIL /MILC/ CSC

Compact body, interchangeable lenses, DSLR sensor

Compact

Point and shoot. For those who want to take a picture, but don’t give a… tinkle (!!) about exposure, WB, etc,( although some cameras do allow semi auto modes (Av) and (Tv))

Toy

Well, it is good for practice for children if it actually functions, but does not really deserve a mention in this section!