View cameras can basically be separated into two general types - flatbed and monorail. They are designed for different purposes and have varying degrees of movement and portability. Choosing the right type will depend on what types of subjects you'll be photographing and under what conditions.
All models are cameras with movements that have three common parts: a front standard to hold the lens, a rear standard to hold the film and a flexible bellow that adjusts the distance between the lens and film. The way the standards are joined defines what type of camera it is. View cameras are sized to use a variety of film sizes such as 120 and 220 roll film and assorted sizes of sheet film. The most popular sizes are 4x5 and 8x10 inches.
If you slightly modify the dark slide, you can expose half a sheet of film at a time, but you need to change the format so a 4x5 camera can take two 2x5 panoramic shots and an 8x10 model can take two 4x10s etc. This is a good feature for landscape photography.