Another common cause for unsharp pictures is camera shake. To reduce camera shake arms must be kept firmly against .
the body, feet must be planted on the ground, the camera must be held tightly against the face of the photographer, and one must take a deep breathe and hold it in. However, before one can even start taking pictures with a thirty-five millimeter camera one needs to know how to load and unload the film. Make sure when loading the film, that it is loaded in the dark or shade, never in direct sun light. Furthermore when finished taking the pictures be sure to never turn the rewind knob the wrong way. If the rewind knob is turned the wrong way it will kink or jam the film. An additional skill that must be mastered before taking the picture, is focusing. There are different types of focusing mechanisms. One of the most simplistic compacted focuser is the fixed focus. Mainly found in disposable cameras. These cameras are preset to provide sharp focus over a given distance range. SLR cameras, or thirty-five millimeter cameras, are manual. To begin with, one must look through the lens and then focus (McConnell 7-18). Then there are cameras with automatic focus. To start off, one directs the lens to their desired subject then the camera will focus. This makes taking pictures easy, however, there are drawbacks. Sometimes the camera will focus on the wrong subject if the subject is not centered in the picture (Brown 18). In addition to focusing, depth of field must be considered before you are reading to take the photograph. Depth of field deals with the length of the picture, if the picture is going to capture a long distance or a short distance. Depth of field becomes greater as the size of the lens opening decreases, the subject distance increases, or the focal length of the lens and subject distance remains unchanged (McConnell 26). Also, a specific form of distance is called Hyper focal.