john_van_v
Well-known
This probably affects many of use: dented lens filter threads.
The obvious, and only, solution is a slip-on filters and hoods.
My immediate quesion is this:
My other question is this:
Has any one found and newly updated pages with this kind of angle information for lenses, or how-to's for making hoods.
There was some around, but got deleted or was too obfuscated to understand.
Cheers, John
The obvious, and only, solution is a slip-on filters and hoods.
My immediate quesion is this:
23mm D x 65mm W
What lenses would this work with, in other words, not block?
My other question is this:
Has any one found and newly updated pages with this kind of angle information for lenses, or how-to's for making hoods.
There was some around, but got deleted or was too obfuscated to understand.
Cheers, John
ferider
Veteran
What's the filter size, John ?
john_van_v
Well-known
It is 51mm OD, 49mm ID
ferider
Veteran
Let's see if I get this right, and forgive the math:
FOV = 2 * atan((65 - 51) / 2 / 23) = 34 degrees. Roughly corresponds to the diagonal field of view of a 75mm lens on full frame.
Hope this helps,
Roland.
FOV = 2 * atan((65 - 51) / 2 / 23) = 34 degrees. Roughly corresponds to the diagonal field of view of a 75mm lens on full frame.
Hope this helps,
Roland.
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john_van_v
Well-known
Actually it is what I need then, the oly f1.4 hood -- I was around some hostile people, got nervous, and dropped her!
You are a wunderkind (is that a word?) I suppose we should make a wiki page with your formula.
Gold 200 / Zuiko f1.4, thats my formula for still life
You are a wunderkind (is that a word?) I suppose we should make a wiki page with your formula.
Gold 200 / Zuiko f1.4, thats my formula for still life