CCD Focal Length Calculator
This calculator finds the maximum lens focal length and the
appropriate minimum field of view, based on data entered for the CCD size, the distance from the lens to the
object, and the maximum size of the target object to be imaged.
Select the CCD size from the options in the drop box or select
CUSTOM. If CUSTOM is selected, enter the numeric value for the
custom CCD size in millimeters. The standard default is 1/4 inch and
the custom default is 10mm. Enter the numeric value for the distance
from the lens to the target object and select the designation for
distance from the drop box. The combined defaults yield 10 meters.
Enter the numeric value for the maximum size of the target object
also select the designation for the size, from the drop box. The
default is again, 10 meters. All calculations take place at each
entry. You may however, click Calculate to update if needed. You may
click Clear Values to begin again. The result is displayed as a very
accurate rendering of the maximum focal length, in millimeters, and
the minimum field of view in degrees.
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