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Re: [OM] Off Topic: Viewfinder spec definitions

Subject: Re: [OM] Off Topic: Viewfinder spec definitions
From: Matthias Wilke <Matthias.K.Wilke@xxxxxxxxxxxxxxxxxx>
Date: Mon, 25 Jan 1999 22:25:50 +0200
Paul wrote:

>On a related note, I read somewhere that when camera manufacturers specify the
>coverage of their finders (93%, 97%, etc...) they are comparing linear
>measurements. So a 97 0.000000inder shows 24mm*.97=23.28mm X 36mm*.97=34.92mm. 
>In
>reality this is only 940f the area of the image - 24*36=864 sq. mm vs.
>23.28*34.92=812.9376; 812.9376/864=94.09%
>
>So a 93 0.000000inder (like on the OM2000) only shows 86.50f the image.
>
>Can anyone verify this?

I think this is right, because sometimes (with medium format cameras for
example) the magnification is specified with two values for vertical and
horizontal magnification.

Matthias



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