Olympus-OM
[Top] [All Lists]

Re: [OM] Need Tripod and Head advice

Subject: Re: [OM] Need Tripod and Head advice
From: "John A. Lind" <jlind@xxxxxxxxxxxx>
Date: Fri, 11 Apr 2003 01:13:09 -0400
They are discussing the *rear* lens node. A lens has two nodes . . . front and rear. The effective location of the rear node is one focal length in front of the film plane when the lens is focused at infinity.

A lens node is sometimes also referred to as a principle point . . . although the strict definition for the two is different. However, if the media in front and behind the lens is the same (i.e., same refractive index), they are in the same location.

-- John

At 23:37 4/10/03, Lama asked:
Is the "lens node" always one-half of the focal length away from the film plane?

Just wondering,
Lama

> This is not a true panorama head, or at least a very limited one, as it
> does not allow for placing the lens node over the rotation axis.


< This message was delivered via the Olympus Mailing List >
< For questions, mailto:owner-olympus@xxxxxxxxxxxxxxx >
< Web Page: http://Zuiko.sls.bc.ca/swright/olympuslist.html >


<Prev in Thread] Current Thread [Next in Thread>
Sponsored by Tako
Impressum | Datenschutz