[Leica] Focus shift on 50/1.4 Nikkor on M8

[len-1 at comcast.net (Leonard Taupier)]

Jeffrey,

This is similar to what I see on the Noctilux. Your Nikkor is  
probably on the edge of a back focus point and then shifts at f4. I  
think most lenses focus shift somewhat.

I just checked my 1.5 Summilux.

1.5 Very soft. just out of focus. front focus. some flare.
2.0 Soft (low contrast). just in focus. still front focus.
2.8 -> 16. In focus. sharpens up nicely. focus in center of DOF.

Len


On Apr 1, 2007, at 3:25 PM, Jeffery Smith wrote:

> Well, I wasn't expecting this. Shooting a copper wire about 5 feet  
> from me
> with the M8 and 50/1.4 Nikkor LTM:
>
> 1.4   In focus but soft
> 2     In focus
> 2.8   In focus
> 4     Slightly out of focus
> 5.6   Even more of of focus(!)
> 8-22  In focus
>
> Optics guys, is this a reasonable result?
>
>
>
> Jeffery Smith
> New Orleans, LA
> http://www.400tx.com
> http://400tx.blogspot.com/
>
>
>
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