I had to dig out my sample of the copy stand to figure out exactly what is
going on. The 43 -> 49 and 22.5,43.5 -> 49 adapters do indeed have threads
only on the smaller side, the 49mm copy stand side is completely smooth. The
55 -> 49 adapter on the other hand appears to have threads on both sides of the
adapter, but on closer inspection the 49mm side "threads" aren't really
threads. The inside of the adapter has ridges which makes it appear to have
threads but they aren't. I suppose Olympus did this to cut down on any light
reflection since the adapter is going into a larger lens opening. So the
illustration in the SIF is correct, only the assumption that they're threads is
incorrect.
-mark
On 13-May-18, at 7:45 PM, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> I don't know what you refer to as the "SIF" other than source documents
> for the eSIF that I don't have. But the eSIF does reference the user's
> manual for the Handy Copy Stand which does show the 3 adapters available
> for it. One of those is the 49/55 and, as you stated, the drawing shows
> the 49mm side as threaded whereas the other two adapters are not
> threaded on both sides. I agree. It must be an error.
>
> Chuck Norcutt
>
> On 5/18/2013 4:00 PM, piers@xxxxxxxx wrote:
>> The 55-49 adapter appears in the SIF (not eSIF, where it is said to be
>> optional) as part of the Handy Copy Stand set, for just the same
>> application, and the illustration is consistent with your description,
>> except it has a thread on the 49mm end. I think that's an error, as
>> the smaller adaptors don't have a thread.
>>
>> Piers
>>
>> On 18/05/2013, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>>> The next question is whether the 49/55 adapter was originally supplied
>>> with the bellows. Does anyone actually have one of these and does it
>>> look as I described that I think it must look? Searching the eSIF
>>> (briefly) did not reveal such a part to me.
>>>
>>> I've got to think about how to replicate a part like that for reversing
>>> my 90/2.5 Viv S1 macro which a 58mm filter. If there's a 49 to 55mm
>>> filter adapter that would work. You'd need the ring from the 49mm
>>> filter to make a 51mm diameter attachment point for the bellows.
>>>
>>> Chuck Norcutt
>>>
>>>
>>> On 5/18/2013 3:03 AM, piers@xxxxxxxx wrote:
>>>> Splendid stuff, Chuck, it all does now make sense in a way that eSIF
>>>> and SIF (which I also reviewed) don't even approach. It was late, I
>>>> didn't follow my own advice to just try it!
>>>>
>>>> Piers
>>>>
>>>> On 18/05/2013, Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
>>>>> You're inferring stuff rather than actually measuring the bellows. I
>>>>> have done my due diligence and discovered that the eSIF is perfectly
>>>>> correct. The reason that a Series VI is used is that hole is supposed
>>>>> to take a filter... a Series VI size filter... which Wiki tells me thus:
>>>>> Series number Filter size Adapter ring
>>>>> VI 41.3 mm 44 mm
>>>>> My handy dandy millimeter rule tells me that the thread on the back of
>>>>> the lens board is (whaddya know) 44mm. I discovered that very quickly
>>>>> since no 49mm filter would fit there. That threaded hole is
>>>>> specifically for a filter and not for reversing lenses.
>>>>>
>>>>> Once again, the bellows manual tells you nothing about that filter
>>>>> provision. Your confusion about reversing lenses I think comes about
>>>>> from assuming that it's done the way you would on a camera body by
>>>>> attaching two lenses together joined by a male threaded ring with
>>>>> threads on each side to match the lenses to be joined. You've assumed
>>>>> that the 49/55 adapter is one of those rings... but it is not. It has a
>>>>> totally different function and isn't really 49mm on one end.
>>>>>
>>>>> Once you turn the front lens board around you don't need any sort of
>>>>> threaded adapter since the OM lens mount on the lens board is now facing
>>>>> the camera. Just install the lens on the normal lens mount and it, like
>>>>> the lens board, is now reversed. Where the 49/55 adapter comes in has
>>>>> to do with attaching the bellows itself to the lens. The attaching ring
>>>>> normally attaches to a ring on the back of the lens board that is about
>>>>> 51mm diameter... or the outside diameter of a lens having a 49mm filter.
>>>>> When you reverse a lens having a 49mm filter the bellows attaching
>>>>> ring fits over the lens in the same way as it does the ring on the back
>>>>> of the lens board. But when you use a lens with 55mm filter the lens is
>>>>> too large. It needs a step-down ring. Now, since I have never seen one
>>>>> of these step-down rings I can only conclude that it has a 55mm thread
>>>>> on one end and a 51mm unthreaded ring on the other such that it presents
>>>>> the same diameter to the bellows attaching ring as the ring on the back
>>>>> side of the lens board.
>>>>>
>>>>> Or something like that. If you know something else correct me.
>>>>>
>>>>> Chuck Norcutt
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On 5/17/2013 6:23 PM, Piers Hemy wrote:
>>>>>> Without looking at the Bellows manual I would opine that it would be
>>>>>> surprising to find that Olympus did not use the 49/55mm thread there,
>>>>>> as
>>>>>> it
>>>>>> is intended for reversing OM lenses on the (reversed) front standard.
>>>>>> Why
>>>>>> would they use a thread incompatible with all and any of their own
>>>>>> lenses?
>>>>>> And in place of reading a secondary source (useful as the eSIF is), why
>>>>>> not
>>>>>> try it?
>>>>>>
>>>>>> So I did look at the 12/81 edition of the Auto Bellows manual, and
>>>>>> guess
>>>>>> what?
>>>>>>
>>>>>> I was wrong.
>>>>>>
>>>>>> And so is the eSIF, only more wronger (!)
>>>>>>
>>>>>> It's a 49mm thread, as "The adapter ring 55-49mm is needed to reverse
>>>>>> the
>>>>>> Macro 55mm F1.2 on the bellows" (p 14). Granted, they described the
>>>>>> 55/1.2
>>>>>> as a Macro lens, which it isn't, but it does have a 55mm filter thread,
>>>>>> from
>>>>>> which I conclude the bellows has only a 49mm thread.
>>>>>>
>>>>>> Piers
>>>>>>
>>>>>> -----Original Message-----
>>>>>> From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx]
>>>>>> Sent: 17 May 2013 22:26
>>>>>> To: Olympus Camera Discussion
>>>>>> Subject: Re: [OM] Oly 4/3 vs m4/3 lens mounts and adapters
>>>>>>
>>>>>> I tried the focusing stage since Wayne said he'd gotten such an
>>>>>> arrangement
>>>>>> to work with his Pen and, if it worked, would require nothing more than
>>>>>> what
>>>>>> I already have.
>>>>>>
>>>>>> I didn't come up with your solution since I've never completely read
>>>>>> the
>>>>>> bellows description in the eSIF which is, I think, the only place that
>>>>>> tells
>>>>>> you that the back of the lens board is threaded. But it looks like you
>>>>>> need
>>>>>> to re-read it yourself :-) since the thread is for a Series VI filter
>>>>>> and
>>>>>> is
>>>>>> not a 49/55 filter thread. Nevertheless, your solution should work
>>>>>> given
>>>>>> the right bits and pieces.
>>>>>>
>>>>>> But re-reading the eSIF to understand what you had written caused me to
>>>>>> think about reversing the lens which might provide a bit more room to
>>>>>> maneuver since it moves the thick base of the lens board to the back
>>>>>> side.
>>>>>> Maybe. Thanks for the memory jog.
>>>>>>
>>>>>> Chuck Norcutt
>>>>>>
>>>>>>
>>>>>> On 5/17/2013 5:35 AM, Piers Hemy wrote:
>>>>>>> I may have missed something obvious, but why are you using the
>>>>>>> focusing stage? Remove the rear standard (camera mounting board) and
>>>>>>> bellows from the bellows rail, and use the 49/55mm filter threads on
>>>>>>> the back of the front standard (lens board) to mount the OM-D. You'll
>>>>>>> need a 55mm m4/3 reverse adaptor such as 271191801433 on the auction
>>>>>>> site, and a female-female filter adaptor such as this:
>>>>>>> http://www.camera-filters.com/index.php?main_page=product_info&cPath=4
>>>>>>> 31&pro
>>>>>>> ducts_id=7214
>>>>>>>
>>>>>>> You may also need a blank filter ring to get extra separation, but I'm
>>>>>>> sure you'll work that out!
>>>>>>>
>>>>>>> Piers
>>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: Chuck Norcutt [mailto:chucknorcutt@xxxxxxxxxxxxxxxx]
>>>>>>> Sent: 16 May 2013 18:04
>>>>>>> To: Olympus Camera Discussion
>>>>>>> Subject: Re: [OM] Oly 4/3 vs m4/3 lens mounts and adapters
>>>>>>>
>>>>>>> I'm removing the grain of salt. I mounted the E-M5 on the focusing
>>>>>>> stage, installed the OM adapter and some OM extension tubes and then
>>>>>>> put the OM body mount from the bellows onto the end of the tubes.
>>>>>>> Running the body mount into the bellows connector resulted in the E-M5
>>>>>>> setting in a non-level position on the focusing stage. I think my
>>>>>>> guess of 3mm (maybe 2mm) vertical misalignment may be about right but
>>>>>>> it's not the height of the body or lens center lines.
>>>>>>>
>>>>>>> I had assumed that the OM body was lower and would align properly.
>>>>>>> Nope, the two camera's lens centers appear to be at the same height so
>>>>>>> an
>>>>>>> OM-1 on the focusing stage doesn't align either. The problem of
>>>>>>> vertical misalignment is caused by the height of the focusing stage.
>>>>>>>
>>>>>>> Chuck Norcutt
>>>>>>>
>>>>>>>
>>>>>>> On 5/15/2013 11:15 AM, Chuck Norcutt wrote:
>>>>>>>> A quick and very rough measurement looks like the vertical centerline
>>>>>>>> of the E-M5 is about 3mm higher than an OM body. But take that with
>>>>>>>> a grain of salt. Also, like the E-P1 the tripod thread is off center
>>>>>>>> from the lens center by about 9mm. That, however, could likely be
>>>>>>>> solved by drilling and tapping a new hole in the focusing stage.
>>>>>>>> I'll take a better measurement later since this has some promise.
>>>>>>>>
>>>>>>>> Chuck Norcutt
>>>>>>>>
>>>>>>>>
>>>>>>>> On 5/15/2013 8:17 AM, Wayne Harridge wrote:
>>>>>>>>> G'day Chuck,
>>>>>>>>>
>>>>>>>>> Something like this should work:
>>>>>>>>>
>>>>>>>>> http://www.structuregraphs.com/RandomStuff/15-May-20
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