That spreadsheet was contributed by our own "JCO".

Thanks JC.

Len
---

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, April 24, 2002 2:38 PM
To: [EMAIL PROTECTED]
Subject: RE: Hood depth


Len wrote:

Is there a formula for calculating the maximum depth of the hood, given the 
focal length of a lens in millimeters, it's maximum aperture diameter also 
in millimeters, and the diameter of the hood in millimeters? 

Len,
At http://people.smu.edu/rmonagha/mf/flare.html#homebrew you'll find a link
to a Hood Length Calculator in Excel.

[EMAIL PROTECTED]

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