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#1 2014-05-15 02:44:56

Registered: 2011-12-01
Posts: 12

Inverse Function

Hi All

I have come across this problem and it's giving me some jip.

I have a function

I would like to be able to put in the field of view and then solve for the focal length. Is this possible, what with
there being 2 internal variables?

Many thanks in advance.


I see it, but I don't believe it.


#2 2014-05-15 04:17:27

Real Member
From: The Foundation
Registered: 2011-05-23
Posts: 15,918

Re: Inverse Function

Not without knowing 'width' too.

“Here lies the reader who will never open this book. He is forever dead.
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.


#3 2014-05-15 05:25:53

From: Bumpkinland
Registered: 2009-04-12
Posts: 93,955

Re: Inverse Function


You can solve for it but there will still be one more variable.

In mathematics, you don't understand things. You just get used to them.

I agree with you regarding the satisfaction and importance of actually computing some numbers. I can't tell you how often I see time and money wasted because someone didn't bother to run the numbers.


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