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[OM] Re: Tokina/Kiron/Zuiko 28mm test, was: Vivitar/Kiron 28/2 question

Subject: [OM] Re: Tokina/Kiron/Zuiko 28mm test, was: Vivitar/Kiron 28/2 questions
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxx>
Date: Tue, 26 Sep 2006 18:43:09 -0400
An interesting result that is strangely not supported by the 4MP 
in-camera processed JPEG's.  If anything the Kiron has more contrast and 
saturation than the Tokina and that is probably largely due to the light 
and not the lens.  Whatever came about here must be the result of my use 
of Capture 1 to do the raw processing.

Just checking the f/4 and f/5.6 images from both lenses the Kiron shots 
were in full blazing sun and the door was slightly blown so I did reduce 
the exposure a bit.  Maybe 1/3 stop.  The Tokina images were taken under 
a cloud with rather indistinct shadows.  The diddlings and differences 
have apparently had some significant side effects.

This stuff is not easy.  As I said, if I were to do this again I'd do it 
indoors and use the studio flash units for light.

Chuck Norcutt


Paul Braun wrote:

> Chuck Norcutt wrote:
> 
>>Conclusion:  There are certainly some differences bewtween these lenses
>>and the Kiron is notably softer at the edge until f/8.  There also may
>>be a bit of vignetting with the Kiron at f/2 but it's hard to say.
>>Beyond that I don't think the differences amount to a hill of beans
>>unless you're really into 30x40 prints examined at reading distance.
>>
>>This is also too much work.  If I had to do it again I'd probably shoot
>>it in the basement using Alien Bees for light.  :-)
>>
> 
> It seems to me that the Kiron definitely has the edge for center 
> sharpness, but loses it at the edges.  That sharpness, however, needs to 
> be balanced with the "flatness" and lack of contrasty-ness of the 
> images.  color renditions are better on the other two lenses.
> 


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