I just checked my own bellows and find that it doesn't completely agree
with the description on the MIR site and on the eSIF. Like you, I see
ridges on the back of the lens mount board but they seem too fine for
filter threads. And the camera mount board not only doesn't have any
threads but the bellows is not readily detachable there as it is on the
lens end. If there were threads there they would not be accessible.
Furthermore, neither the eSIF copy of the user's manual or text of the
manual quoted by Alan Wood's site makes any mention of filter threads.
But there are supposedly two versions of the bellows according to Woods.
The later version has green markings (in addition to the white and
orange of the earlier one) for the auto diaphragm version of the 80mm
bellows lens. I'm not sure where this info comes from either since
there is no such mention of using green markings on the bellows in the
80mm auto user's manual.
If all of this is true there must exist a later version of the bellows
user's manual describing modifications made to the later model which
must include: a separate green scale for the 80mm auto, filter threads
on the inside of both mounting boards and provision for removing the
bellows from the body mounting board as well as the lens board. Anybody
got one of these?
Before sending I decided to check my notes on the bellows and discovered
this from Phillip Franklin dating from March of 2000. This may be the
source of the data in the eSIF. Note that only the front is mentioned.
-------------------------------------------------------
Date: Tue, 07 Mar 2000 12:41:49 -0800
From: Phillip Franklin <pfranklin@xxxxxxxx>
Subject: [OM] [OM} Bellow Reversed Front Standard is Series 6 thread
Hans & everyone else interested,
I just tested it out. That front standard reversed uses a Series 6
thread. So with a Series 6 to 49mm or 52mm step up ring it should make
it easy to attach the Ring Flash or any other filter type attachment to
the bellows with the lens reversed. Also by doing this it will protect
the back element from a possible scratch when getting close with macro.
I even found a Series 6 polaring filter in my stash of stuff from using
a Mamyia Universal 6x9 camera. I do have some Series 6 filters but none
with the step up to 49mm or 52mm, however they should not be hard to find.
Wow, I've finally made a concrete contribution as opposed to general
opinions.
Phillip Franklin
---------------------------------------------------------
But I find this a bit confusing. Series filters are not threaded. The
only threads are on adapter rings (series 6 to specific lens thread) and
retaining rings to hold the drop-in filter into the adapter. But these
may optionally have additional threads in the front so perhaps what
Phillip is talking about is a Series VI retaining ring with a 49mm
step-up on the front. B&H still sells some series accessories but not
what Philip mentions.
Chuck Norcutt
Jay Drew wrote:
>
>
> But I did learn that (according to the MIR site) that the boards are threaded
> for Series VI filters. I don't have that filter (and why wouldn't they use
> 49mm
> filter thread?) - so I can't verify that tidbit of information. I see ridges
> but I couldn't say for certain that they are threads or just ridges to knock
> down reflected light.
--
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