Film types and sensitivity Film type and film sensitivity obviously played a big part in photography. Films are either black and white or colour. Film formats are either print or slide. Slide film might give slightly better results; although print film can be more forgiving since you can make changes during the printing process even if the exposed negative isnít quite right. With slide film, once you've exposed the frame, thatís it. Any exposure errors with slide film, be it over or underexposure, there is nothing much you can do to salvage them. Film sensitivity is another key consideration. Also, print (or negative) film, the photographer has the options of a darker or lighter density in his finished prints. He can even opted for a richer or paler colours in the same prints if he wanted since the commercial labs can do just that with any colour negative film. The following three prints below were printed from the same negative but with different density being applied giving one a lighter appearance, one normal and one darker. In colour prints, less density will result in a lighter (under) print and increased density will result in a darker (over) print as opposed to over or underexposures in films. Film speeds ranging from ISO 100 to ISO 400 are available just about everywhere and the specialty photo shops handle slower and faster films, especially the professional-type color reversal film, which needs to be stored inside a refrigerator even in the shops. << Back to Main . 1 . 2 . 3 . 4 . 5 . 6 . 7 . 8 . 9 . 10 . 11 . 12 .