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Detemining Focal length of lens by an image

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Category: Photography
Forum Name: Cameras, Equipment and Settings
Forum Description: What it Takes to Make the Shot
Printed Date: February/26/2021 at 13:04
Software Version: Web Wiz Forums 12.01 -

Topic: Detemining Focal length of lens by an image
Posted By: Huns023
Subject: Detemining Focal length of lens by an image
Date Posted: October/25/2019 at 03:41
How should design a setup for determining the focal length of a CCD in CMOS TDI camera sensor with an integrated lens to determine the focal length of that lens? I want to verify the focal length information that is provided by the manufacturer which is 580mm with FOV 2.4 degrees.Loco

Posted By: 3_tens
Date Posted: October/25/2019 at 10:15
Not likely to happen from a published image. You have no known measurements for data.

Folks ain't got a sense of humor no more. They don't laugh they just get sore.

Need to follow the rules. Just hard to determine which set of rules to follow
Now the rules have changed again.

Posted By: Huns023
Date Posted: October/25/2019 at 11:21
I am planning to take the photo myself. I want to know if there is a way by keeping the object at specific distance and capturing can help me calculate the focal length accurately. I want to check if the focal length is correct.

Posted By: koshkin
Date Posted: December/16/2019 at 11:02
Do you know the pixel pitch of the sensor?

If you do, it is easy to calculate.


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