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Re: [OM] Tamron 28/2.5 vs Zuiko 28/2.8

Subject: Re: [OM] Tamron 28/2.5 vs Zuiko 28/2.8
From: Robert Maichin <rmaichin@xxxxxxxxx>
Date: Sun, 9 Aug 1998 08:27:42 -0700 (PDT)
It's a different design and probably vignettes wide open -dark
corners. If rear element is larger this may not be so, anyway Tamron's
are only comparable when they are SP's and you did not say.




---Shawn Wright <swright@xxxxxxxxxxxxxxx> wrote:
>
> Today in the local used shop I spotted a lens I've never seen 
> before, a Tamron 28/2.5 adaptall mount. Alongside it were Zuikos: 
> 28/3.5 and 28/2.8 and 35/2.8. 
> 
> I didn't handle the Tamron as I was in a hurry, but what I found 
> curious was that the front element was definitely much smaller 
> diameter than the slower Zuiko 2.8, *and* possibly the 3.5 too 
> (they weren't close together). Does this mean Zuiko front elements 
> are just generous in their use of glass, maybe contributing to their 
> strong wide angle performance? Or is it meaningless and 
> dependent on too many other factors in the lens design? 
> And is the Tamron any good? I could find no mention of it in the 
> archives.
> 
> Just curious...
> Shawn & Janis Wright
> swright@xxxxxxxxx
> http://Zuiko.sls.bc.ca/~swright
> (Olympus List Archives)
> 
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> 
> 

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