Lens Calculator
How to find the focal length
| f |
focal |
| h |
object vertical dimension |
| l |
object horizontal dimension |
| D |
object distance from lens |
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How to find the focal length
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Sensor format
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1"
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2/3"
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1/2"
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1/3"
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1/4"
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Knowing the height of the viewed object
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f= 9.6 D/h |
f= 6.6 D/h |
f= 4.8 D/h |
f= 3.6 D/h |
f= 2.4 D/h |
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Knowing the width of the viewed object
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f= 12.7 D/l |
f= 8.8 D/l |
f= 6.4 D/l |
f= 4.8 D/l |
f= 3.4 D/h |
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How to find the object dimensions
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| |
|
Sensor format
|
1"
|
2/3"
|
1/2"
|
1/3"
|
1/4"
|
|
To calculate the height of the viewed object.
|
h= 9.6 D/f |
h= 6.6 D/f |
h= 4.8 D/f |
h= 3.6 D/f |
h= 2.4 D/f |
|
To calculate the width of the viewed object.
|
l= 12.7 D/f |
l= 8.8 D/f |
l= 6.4 D/f |
l= 4.8 D/f |
l= 3.4 D/f |
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