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re: [OM] Tamron SP 90/f2.8 Macro 1:1 - any good?

Subject: re: [OM] Tamron SP 90/f2.8 Macro 1:1 - any good?
From: "Neil Bell" <neil.bell@xxxxxxxxxxx>
Date: Tue, 20 Apr 1999 12:03:22 +0000
>Does anybody have any experience with this lens (Adapt-All 2 mount)?
>My local Tamron-vendor offers a new lens for $414. I'm unfortunately
>not able to get any Zuiko Macro in Poland (if I only could spend
>$1000, I would
order
>one ;-), so I'm thinking about Tamron.
>Regards,
>Artur

Artur -

I've had this lens for just over a year now and have been extremely 
pleased with it. I've only been seriously into photography for 2 or 3 
years and thus haven't owned or used enough lenses to be able to give 
an expert opinion, but the Tamron is certainly as sharp or sharper 
than any other lens I have. I'm interested in mosses and other small 
plants and have used the lens a lot at near 1:1 with excellent 
results. It's also a great general purpose medium focal length lens 
and the results I've had shooting at longer distances have been 
excellent too.

The lens is quite bulky (about 9.75cm long with adaptall attached, 
and fairly wide) and looks a bit incongruous hanging off an OM1n - 
I've got the MF version which is bigger than the AF one I think. The 
construction is an interesting compromise between traditional and 
modern, with the inner barrel (in which the glass is mounted) made 
out of hard plastic and the outer barrel/chasis of some metal alloy.

The only problem I've had with my lens is that the focusing fairly 
quickly developed a tendency to drift slightly when the lens was 
held vertically downwards. As it was still under warranty when this 
happened I had it sent back to Tamron for tightening and it's now 
fine, although I'm worried that with use it's going to loosen up 
again and eventually require expensive servicing. One thing about the 
adaptall mount - the depth of field preview is a flat sliding 
lever rather than the traditional OM push-button, which I personally 
find a little bit fiddly. It does make it easy to gradually stop 
the lens down, however.

Neil.



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