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Re: [OM] Changing lens mount

Subject: Re: [OM] Changing lens mount
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Fri, 03 Dec 2010 17:58:43 -0500
To clarify, if the register distance of the adapted lens is shorter than 
that of the body being adapted to you can never reach infinity without 
inserting an optical element (which acts like a low power 
tele-converter).  But you could use such a setup as a macro lens 
provided you don't mind not being able to focus further than a meter or 
two or three.  However, even if the register distance of the lens is 
longer than that of the body it must be enough longer to accommodate the 
thickness of an adapter.  One millimeter or thereabouts is probably 
about the practical minimum.  The has to be enough metal for strength.

Chuck Norcutt

On 12/3/2010 3:43 PM, Andrew Fildes wrote:
> No, but it means that you may not achieve infinity focus.
> And as most lenses move a lot at the close end but not much at the long end, 
> you may miss inf. by quite a lot.
> Andrew Fildes
> afildes@xxxxxxxxxxxxx
>
>
>
> On 04/12/2010, at 7:24 AM, AS wrote:
>
>> The differences in register are very small....sometimes a mm or less, what 
>> difference does that make? Does this affect the ability to focus?
>
-- 
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