Thanks, Alan. I could certainly be wrong about Series filters but the
information I consulted before responding describes series filters as
without threads. <http://silverbased.org/series-filters/>
Originally they were designed to have a cell that would accept the
filter and mounting threads on the back of the cell to match a
particular camera's own threads. For example, for a 50mm Zuiko with
49mm threads you would have a Series VII cell with 49mm threads on the
back. It would be called a step-up ring since a Series VII filter is 2"
in diameter and (at 50.8mm) larger than 49mm. The filter would then be
held into the cell by installing a Series VII retaining ring which has a
2-1/8" thread. The retaining ring in some cases might even have it's
own front thread for attaching yet another filter.
But that, I suppose, is how Kodak envisioned it. I'm sure there might
have been many, many variants produced over the years. Including (as my
link describes) the introduction of lenses that were directly threaded
to Series sizes to avoid the need for an adapter.
Chuck Norcutt
Alan Wood wrote:
> Answering Chuck's questions:
>
> The information about a bellows rail marked in green for an 80mm auto
> macro came from a list member, but I can't remember who.
>
> Not all front standards are exactly the same - both of mine have
> circular rings perhaps to cut reflections, but they are not a
> continuous thread.
>
> Thank you very much for posting Phillip's message. I must have
> missed that while off list on holiday. I will update the information
> on my page about the Auto Bellows.
>
> I am not sure that you are correct about Series filters not being
> threaded. I have a zoom closeup lens with a Series VII thread, and a
> step-up adapter marked SER-VII 49mm. The Series VII seems to be
> about 54mm thread. -- Alan Wood http://www.alanwood.net (Unicode,
> special characters, pesticide names)
>
>
>
> ----- Original Message ----
>> From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> To: Olympus
>> Camera Discussion <olympus@xxxxxxxxxxxxxxxxx> Sent: Thursday, 8
>> January, 2009 13:20:09 Subject: Re: [OM] OM Bellows Questions
>
>> 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 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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>
>
>
>
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