The original Tamron 90/2.5 is very much larger than either the Zuiko 80/4 or
135/4.5 macro lenses, and I would not choose it for bellows use because of
that - but it is designed for use at 1:1, so the performance should be just
fine, surely? And if you want one, just email me off-list! Same goes for a
Zuiko 20/3.5 with bayonet adaptor if you want a real macro experience!
Piers
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of Moose
Sent: 19 July 2004 05:25
To: olympus@xxxxxxxxxx
Subject: [OM] Re: [OM]I've done it again. auto bellows
The minimum extension of the bellows is 36 mm. Neither lens will be able to
focus anywhere near infinity, but will be able to focus closer than mounted
directly on the camera. Unless you are going beyond 1:1, the Kiron doesn't
make any sense on the bellows. It's also all metal construction with a
double helicoid and so a rather large, heavy lens, possibly awkward hanging
out on the end of the bellows. Which Tamron 90?
The f2.8 version is about the same deal as the Kiron. The two f2.5 versions
only focus to 1:2 and Tamron sells an extention tube specifically for use
with them from 1:2 to 1:1. With the bellows, you would get a greater range
than that in both directions. With a shorter fl and only a single helicoid,
they are smaller and lighter than the Kiron.
An easy way to get excellent results on the cheap with the bellows is with
an enlarging lens. I keep thinking I'll get the 105/5.6 Componon on my
bellows one day, but haven't reeally checked out what adapter combo I'll
need. Come to think of it, one can just mount it in a body cap.
Some third party OM caps have a nice flat midsection. You lose auto
diaphram, but for much macro work that isn't a big deal.
Moose
Bob Docherty wrote:
>............Do any of you denizens know how well a Tamron 90mm or Kiron
>105mm work on an auto bellows setup?
>
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