----- Original Message -----
From: "Jon Mitchell" <jon@xxxxxxxxxxxxxx>
Sent: Monday, July 15, 2002 9:22 PM
Subject: [OM] Extension Tubes
> Quick query for you all. I've been offered a set of Jessops Auto
> Extension Tubes for OM, from a good friend of my father. They are boxed
> & unused, with instructions. It is a set of 3 - probably "around" 7, 14,
> & 21
In the current Jessops catalogue, their own-brand extension tubes (for
autofocus Canon, Nikon, Minolta, and Pentax) are 70 UK pounds for the set of
three. They no longer list Olympus.
I have a set of Vivitar extension tubes -- 12mm, 20mm, and 36mm. Oftentimes
the identical accessory is sold under different brand names, so the Jessops
might have originated from the same source as my Vivitar ones (I have seen
my Vivitars sold under a different name).
The only caution is to look for the number of screws fixing the lens
mounting plates. If there are 4 screws on each mounting plate, avoid the
tubes. With repeated mounting and dismounting, lenses and tubes with 4
fixing screws slice off the exposure-reset nipple on the lens mounting
flange on the OM4. My Vivitar tubes (and all Zuiko lenses!) have only 3
fixing screws, and don't have this problem.
-- from Cy in the UK
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