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keisanHigh-precision calculations for everyday life and work

Calculate the Focal Length of a Lens

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Calculate the focal length of a lens.
Image Sensor
Image Sensor (Horizontal)
mm
Image Sensor (Vertical)
mm
Distance to the subject
m
Subject Size
m
Focal Length mmA lens is required
Please note that this calculation is not suitable for wide-angle lenses.

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Calculate the Focal Length of a Lens | Keisan