Vivitar V-800MR Manual Do Utilizador

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NOTE: Generally, if a 1/2 shutter speed adjustment is indicated to negative film, a full stop should be taken. 

When a reversal film is being used, disregard the half-stop setting and use a normal shutter speed.

The area in acceptable sharpness in front of, and behind the subject in focus is called the depth of field. The 

aperture selected and the distance of the subject as well as the focal length of a lens determines the depth of 

field. Because of the long focal length of your lens, the depth of field is narrow. For example, with a 800mm     

f8.0 lens, at a distance of 6 feet, the depth of field is only 1/2 inch wide. It is recommended that you practice 

focusing with your lens before taking any serious pictures, especially in close up photography. Also, we 

recommend using a focus magnifier to help determine the depth of field sharpness under extreme 

conditions.