[rollei_list] Re: Leica and Contax
- From: Jerry Lehrer <jerryleh@xxxxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Sun, 03 Apr 2005 18:11:04 -0700
Bob,
In THEORY, a given error would be more significant for WA
lenses than long ones, as it is a greater proportion of the focusing
distance. (infinity to closeup movement of the lens) Right?
Jerry
Bob Shell wrote:
> On Sunday, April 3, 2005, at 05:14 PM, Richard Knoppow wrote:
>
> > Early Nikons were _styled_ like the Contax but did not
> > copy the internal mechanism. Nikon used the Contax type
> > bayonet lens mount but the back focus is different so Contax
> > and Nikon lenses are not interchangible, they don't focus
> > right.
>
> The back focus is the same. It is the pitch of the focusing helical
> that is different. The lenses are completely interchangeable, but long
> lenses will not focus correctly. For wide angles it is less of an
> issue because depth of field generally covers up focusing errors.
>
> Bob
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