Archived posting to the Leica Users Group, 2007/04/01

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Subject: [Leica] Focus shift on 50/1.4 Nikkor on M8
From: Frank.Dernie at btinternet.com (Frank Dernie)
Date: Sun Apr 1 23:09:34 2007
References: <001801c774af$6ab53db0$6501a8c0@asus930> <000801c774b0$a61d9090$44300b44@GATEWAY> <001e01c774b4$acb3d370$6501a8c0@asus930>
 
How could this be the case on a rangefinder camera?
cheers
Frank

On 2 Apr, 2007, at 00:22, G Hopkinson wrote:

> OK, well I think that may add another variable. The focus point may  
> not be identical if you change the aperture AFTER focusing. I
> thought that the back focus (or front focus) issue was when the  
> rangefinder was coincident, at the shooting aperture, but the image
> has a different point of sharpest focus? This error would be most  
> visible with large apertures, and closer subjects, due to the
> inherent lack of DoF?
>
> Cheers
> Hoppy
Replies: Reply from hoppyman at bigpond.net.au (G Hopkinson) ([Leica] Focus shift on 50/1.4 Nikkor on M8)
 In reply to: Message from hoppyman at bigpond.net.au (G Hopkinson) ([Leica] Focus shift on 50/1.4 Nikkor on M8)
Message from jsmith342 at cox.net (Jeffery Smith) ([Leica] Focus shift on 50/1.4 Nikkor on M8)
Message from hoppyman at bigpond.net.au (G Hopkinson) ([Leica] Focus shift on 50/1.4 Nikkor on M8)