Thank you, Paul, this is absolutely fascinating! When I'm settled, I'd love to
learn a little about comparison testing. You made a very convincing case in
favor of this Vivitar. It sounds like an all-time great design and an absolute
bargain... - Phil
On 11:15, Paul Martinez wrote:
>
>I've spent endless hours testing all of them on a FF 14MP digital
>camera (Kodak SLR/c). At close/macro distances there is no doubt.
>The Vivitar 90/2.5 S1 delivers greater detail and is the best
>overall performer consistently. The 90/2, 50/2, and 50/3.5 are all
>great lenses (had them all, and the 100/2). They are excellent at
>normal and close focus, but as they approach their closest focus
>distance at 1:2 macro, the performance drops off. From wide open to
>stopped down, I tested all apertures. The Vivitar is sharper and has
>a flatter field of focus, and less CA at all apertures. It even has
>great bokeh. The Zuiko 90/2 has nice bokeh, but it's not the best.
>If you want great bokeh from a Zuiko I think the 100/2 is better.
>I've also tested the Kiron 100/2.8 and similar Vivitar 105/2.8 macro
>- the Vivitar S1 still came out ahead. If you want top quality macro
>from a Zuiko you need to go with the "real" Zuiko macros that
>Olympus made for the job. Unfortunately, the require bellows/tubes
>and don't work at normal distances.
>
>The "contrast issue" with this lens only happens under certain
>lighting hitting the front of the lens at infinity distances. even
>at infinity, this lens outperformed the Zuiko 90/2 and 100/2 in most
>tests. Using a lens hood helps considerably at those times at
>infinity when there is a strong front light. That's why I am
>including the one I was using. It never happens at close focus
>distances. In fact, that 's one place where this lens shines above
>all others. Besides the extreme detail, this lens clobbers most
>other for it high contrast, even in difficult backlight, at macro
>distances. This lens will take extension tubes, TC's, and close up
>filters much better than any other macro I've tested - which show
>more obvious loss of details and contrast. It also has a much needed
>tripod mount for 1:1 and beyond macro work. I took this same
>picture, directly into the sun with the Kiron macro and it was
>washed out (sorry, tossed the Kiron version):
>
>http://www.imaginenature.com/FL2H4976.jpg
>
>The there is this one I already posted. Just look how well the lens
>held the detail at the harsh contrast gradient between the whites
>and blacks, and the complete lack of any ghosting. Impressive!:
>
>http://www.imaginenature.com/FL2F0180.jpg
>
>I'm not writing all this to sell it, as it appears to already be
>sold. I've spent endless hours looking for the best macro and this
>one repeatedly came out on top for sharpness, color, flat field,
>lack of CA, bokeh...
>
>The only Zuiko "macro" I have kept is the 50/3.5. Unfortunately,
>using it with the OM 25mm extension tube for 1:1 shows loss of
>detail. I've also tried it with the excellent Vivitar 2x macro TC,
>but the corners sharpness, CA, and Bokeh don't come close. Overall,
>the Zuiko 50/3.5 is a nice little lens though:
>
>http://www.imaginenature.com/zuiko50macro_1.jpg
>
>http://www.imaginenature.com/zuiko50macro_2.jpg
>
>Regards, Paul
>
>
>
>-----Original Message----- From: olympus-owner@xxxxxxxxxx
>[mailto:olympus-owner@xxxxxxxxxx]On Behalf Of Philippe Le Zuikomane
>Sent: Thursday, February 01, 2007 9:47 AM To: olympus@xxxxxxxxxx
>Subject: [OM] Re: FS: Vivitar S1 90/2.5 Macro
>
>
>
>Higher resolution than the very latest Zuiko 90/2, 50/2 and 50/3.5?
>Just wondering. - Phil
>
>On 02:01, Paul Martinez wrote:
>
>>The OM 50's and 90mm macro's are nice, but don't go to 1:1, and
>>don't capture the extreme detail this lens does.
>
>
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