First you have to know that quality of camera doesn’t put a direct effect over the photograph. It gives you control over the image, and thus, it delivers more quality to your photograph. This is how a better camera will make the photographs better, but if you do not know the basics, you can not shoot good photographs even with the best camera.
One type of cameras which are widely used is Disposable Cameras. These cameras are basically designed for one time usage and if they are controlled perfectly, provide optimum results. Fujifilm Quicksnap Outdoor Camera is one good example of disposable cameras.
If you are looking for a pocket size camera for snapshots, Compact Cameras are good choice. They provide a wide angle (as much as 28mm) so that you can capture landscape photographs also. You also get the flash to work in dim light and a cool paranormal mode also.
Now we will take a professional look over cameras. The next category includes SLRs. Single Lens reflex Cameras provide the facility to interchange lenses and hence increasing your control over the photograph. If you are a traveler and want to get involved in professional digital photography, this is the best choice.
One more category which lies between compact cameras and SLRs is APS. Advanced Photo System provides the reduced size of the camera and smaller film size. This camera is the first choice of travelers.
The next range in SLRs includes Medium and Large format which provides high resolution to your photographs. These cameras are basically used for high resolution photographs. Due to their bulky size, they are not easy to carry while traveling.
The best thing you can do is decide the purpose for which you are going to buy a camera. Even if you are going to adopt digital photography as your profession, you should try some cameras which have basic features. Don’t go for expensive cameras at first. Try your hands on other cameras and then go for expensive ones.