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Old June 30th 04, 11:21 PM
Bart van der Wolf
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Default what does the focal distance actually mean?


"scott" wrote in message
news:NfHEc.276$WO5.171@newsfe3-gui...
SNIP
Is it possible to work out the field of view in degrees from
the focal length?


Yes, if you know the sensor size, at infinity focus it's:
ATAN( sensor_size / 2 / focal_length) * 2 = FOV

Bart