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Hi

I've written a "Focal length calculator" script, that i'd like to share with
you.

It calculates what focal length you need to fille a frame of a variable size
with an object of a variable size from a certain distance.

For example it can tell you that you need a lense with a 175mm focal length
to fill a 35mm frame with a 10 meter large object from 50 meters.

The adress: http://80.62.24.182/focal.php

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Martin Kaltoft