Nikon Data

Focal Length Minimum.

Focal Length Minimum.

Focal Length is the distance in mm from the optical center of the lens to back plain of the camera (the postion of the film or sensor).

Around 50mm is described as normal (neither magnifies nor reduces the image size). The lower the focal length the more wide angle the view becomes and the greater the apparent reduction of the size of the subject. Conversly, the greater the focal lenght, the narrower the angle and the greater the maginification.

In the case of a 35mm image sensor ( FX high end digital cameras eg D3,D700, and all Film cameras using 35mm film) the effect (Normal, Wide Angle etc) of the focal length is as follows :-

50 mm = Normal.

Less than 50 mm. Wide Angle

Less than 20mm. Super Wide Angle

Greater than 50 mm. Telephoto

Greater than 300 mm Super Telephoto

In the Case of 24mm image sensor ( all Nikon Digital cameras except the D3 and D700) the smaller sensor has a magnifying effect . The focal length of the lense is not changed but on the 24mm cameras, the resulting image on the photo appears as though it was taken with a lense of focal length 1.5 times greater. Therefore the effect (Normal, Wide Angle etc) of the focal length is as follows :-

33 mm = Normal.

Less than 33 mm. Wide Angle

Less than 13 mm. Super Wide Angle

Greater than 33 mm. Telephoto

Greate than 200 mm Super Telephoto


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