Re: [OM] Zooms at Dawn - the 50mm shootout - Teaser

Subject: Re: [OM] Zooms at Dawn - the 50mm shootout - Teaser
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Mon, 19 Apr 2010 21:54:37 -0400
Ah, yes.  I forgot about that.  But is it only zooms or any lens that 
works via internal focusing?

Chuck Norcutt

C.H.Ling wrote:
> Focus length is defined at infinity, most zooms are much shorter than the 
> marked focal length at close distance.
> C.H.Ling
> ----- Original Message ----- 
> From: "Ken Norton" <ken@xxxxxxxxxxx>
>>> If all of the tests were set up the same, why are some images and
>>> highlights
>>> different sizes?
>> Those are 100% crops in Studio 2.  The positioning is a little different
>> because of something else we discovered about these lenses--they aren't 
>> all
>> exactly lined up the same.  Hmmm.  (although some of this difference may
>> possibly be caused by changing position of the sensor even though IS was
>> turned off, but after the camera resets with lens changes, who knows...)
>> Same with the apparent focal-length of #1 not quite looking like 50mm even
>> though the exif says 50mm.
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