Archived posting to the Leica Users Group, 1996/04/20

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To: leica-users@mejac.palo-alto.ca.us
Subject: Re: RF Viewfinder vs. Reflex Viewfinder
From: Edward Meyers <aghalide@phantom.com>
Date: Sat, 20 Apr 1996 11:53:10 -0400 (EDT)



On Fri, 19 Apr 1996, joe b. wrote:

> In message <Pine.SOL.3.91.960418232733.24792B-100000@godzilla2.acpub.duk
> e.edu>, Michael Volow <mvolo@acpub.duke.edu> writes
> >On one hand, the reflex viewfinder
> >displays objects in the perspective of the focal length of the attached
> >lens (e.g. wide angle lenses show wide angle perspective). What ways to
> >people compensate for the fact that the Leica M viewfinder, though framing
> >accurately, displays only the perspective of a 40-50mm lens.
> 
> The M viewfinder frames correctly display the perspective of the lens in
> question, assuming the frames for that lens appear in the viewfinder.
> There is no way they could not do so without optical distortion.
> Assuming that you remain in one place, perspective is then a function of
> angle of view, which is a function of focal length of the lens used. If
> the viewfinder shows the field of view for the 28mm lens, it
> automatically shows the same perspective. Likewise the other frames in
> the viewfinder. 
> 
> You can experiment with a rectangle cut out of a piece of card to try
> different angles of view. It will all make sense in the end. ;->
> -- 
> joe b.
> 
Yep...perspective has nothing to do with the lens (except for a
fisheye lens). perspective is totally (that exception) controlled
by the viewpoint--high, low, close or far. The lens is only a way
to image it, larger, or smaller, less or more. Period. Ed Meyers

In reply to: Message from "joe b." <joe@azurite.demon.co.uk> (RF Viewfinder vs. Reflex Viewfinder)