Obviously the manufacturer of mine thought the opposite! The elements move
as a group in relation to the tube, which holds the prime lens at a fixed
extension from the film plane.
It's a Panagor, which I had thought was another brand applied to the same
items that were branded Vivitar.
--
Piers
-----Original Message-----
From: olympus-owner@xxxxxxxxxx [mailto:olympus-owner@xxxxxxxxxx] On Behalf
Of Andrew Fildes
Sent: 17 December 2004 09:41
To: olympus@xxxxxxxxxx
Subject: [OM] Re: WTB- 25mm auto extension tube
The well regarded Vivitar/Teleplus 2X Macro type which I think was made by
Glanz (sp?) has considerable extension - just measured it at 18mm approx.
for 1:1 reproduction with a 50mm. As you turn it, the nose extends forward.
The extension increases tube length between the magnifying lens elements and
the mounted lens - for those who were asking about the best place to fit an
extension tube a few weeks back. This manufacturer seems to think that the
tube should go between the the teleconverter and the lens.
AndrewF
On 17/12/2004, at 7:49 PM, Piers Hemy wrote:
>
> I think not - if all the macro focussing converters are like the one I
> have, they have internal elements which move, but the tube part
> remains fixed length. It does not work as a variable extension tube.
>
> Has anyone tried this with one of the macro focussing teleconverters ?
> Seems this might give a bit more versatility with a variable length
> tube.
>
> Wayne Harridge
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