Lens Unit
Posted on Wednesday, February 17, 2010 in Photography
Camera lenses are described in terms of their focal length. A 50 mm lens has a focal length of 50 mm.?
A camera is focused on an object 16 m away using 72 mm lens. Locate the position of the image. Answer in units of mm.
1/f = 1/u + 1/v
1/72 – 1/16000 = 1/v
v = 72.3 mm ( behind the lens. The image is real, inverted and diminished )
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