Candid Photography is the kind where the subject does not poses for the photograph. It is the natural expression that is caught by the photographer. Candid photographs are taken as a scene happens. These are taken on the go! When taking candid photographs the most important aspect that needs to be taken into consideration is that the subject should not know that he or she is being photographed. That is what the beauty of this style of photography is. Everything should be realistic.
A major difference between candid photography and street photography is that in candid photographs the subject is mainly your known people, they are not strangers. In street photography the subject is always a stranger. In candid, it is important to capture the the right expression at the right moment. Some also confuse candid with portrait photography. You could see a lot of candid photographs being taken during celebrations, weddings, parties, etc. as there are high chances of getting some really weird and funny expressions of people at these times. Also, for great candid photography, always try to keep at least two or more subjects in your photograph.
Some tips for candid photography are to lose the flash, take a lot of pictures, carry the camera everywhere, be patient and quick! If you use flash there are high chances that the subject might realize you are going to photograph him or her and you might not get the original, realistic photograph. You could visit digital-photography-school for some more great tips and tricks for candid photography.
In the meanwhile you may want to read some of our photography related articles