Bummer - sorry to lead you astray on that one.
...Wayne
>
> 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-
> 2013/index.html#201
> >> 30515-A
> >> .jpg
> >>
> >> OM focussing rail with slide copier attached E-P1 with om -> m4/3
> >> adapter and 50/3.5 @1:2
> >>
> >> The only problem with this is that the E-P1 tripod thread is not
> >> below the optical axis of the lens. Vertical alignment is ok. What
> >> is the situation with the E-M5 ?
> >>
> >> To get good contrast you'd probably need to cover the gap between the
> >> lens and slide copier with a dark cloth.
> >>
> >> ...Wayne
> >>
> >>
> >>
> >>>
> >>> Thanks, Wayne. That answers my question; the 4/3 mount is not
> >>> physically compatible with the m4/3 mount. But I'm afraid OM tubes
> >>> won't solve my problem. My problem is that the OM->m4/3 adapter is
> >>> already too long for what I'm trying to do with the bellows and
> >>> slide copier. I can't connect
> >> with
> >>> the slide copier using tubes alone and adding tubes to the bellows
> >>> would make the problem worse.
> >>>
> >>> Steve Barbour sent me links to the 4/3->m4/3 adapter (thanks, Steve)
> >>> but that won't help me either. I would still have to connect that
> >>> up to an OM adapter which gets me right back to the length problem
> >>> I'm trying to overcome.
> >>>
> >>> What I need is an OM->m4/3 adapter with a 15-20mm section sawed out
> >>> of the middle. The 80/4 is probably the right solution but I don't
> >>> have one
> >> of
> >>> those. :-) I'll have to think about this some more. What I need is
> >> something
> >>> like an m4/3 lens flange glued directly to the back of an OM body
flange.
> >>> Basically an m4/3->OM adapter without the tube between the two
> mounts.
> >>>
> >>> Chuck Norcutt
> >>>
> >>>
> >>> On 5/14/2013 11:28 PM, Wayne Harridge wrote:
> >>>> I tried to mount one of my OM->4/3 adapters on my E-P1 - too big.
> >>>> I'm not surprised actually as I reckon Oly would have copped it
> >>>> from a whole lot of customers who mounted a 4/3 lens on an m4/3
> >>>> body and
> >>> found it didn't focus.
> >>>>
> >>>> Perhaps pick up some cheap OM tubes, they seem to be plentiful on
> >>>> that auction site.
> >>>>
> >>>> ...Wayne
> >>>>
> >>>>
> >>>>>
> >>>>> Can someone who has both systems verify whether or not a 4/3 lens
> >>>>> fits on
> >>>> a
> >>>>> m4/3 camera? I know it won't focus properly and maybe not even
> >>>>> operate electrically. My only real concern is whether a 4/3 lens
> >>>>> (or OM to 4/3
> >>>>> adapter) physically fits into an m4/3 body.
> >>>>>
> >>>>> The reason I ask is that I was trying to use my OM bellows and
> >>>>> slide
> >>>> copier
> >>>>> today to see if I could copy slides onto my E-M5. To do that I
> >>>>> need a magnification of approx 0.5X. If I had a Zuiko 80/4 short
> >>>>> mount macro
> >>>> lens for
> >>>>> the bellows I'd be OK. But my only two macro lenses are my 90/2.5
> >>>>> Viv S1 and my 50/3.5 Zuiko.
> >>>>>
> >>>>> I don't think I can get the 90/2.5 to work at all since at 0.5X I
> >>>>> think
> >>>> the image
> >>>>> of a slide is somewhere beyond the length of the bellows rail.
> >>>>> The 50/3.5 macro is only designed to do about 0.68X on the
bellows.
> >>>>> The bellows itself prevents it from getting to 0.5X. The
> >>>>> limitation is
> >>>> imposed
> >>>>> by the minimum separation of the lens board and camera mounting
> >>> board.
> >>>>> According to my possibly dodgy calculations the image plane needs
> >>>>> to be brought forward about 14mm. If you were using an OM or 4/3
> >>>>> body that wouldn't be possible. However, I note that the 4/3 to
> >>>>> OM adapter is about 20mm shorter than the m4/3 adapter. If I had
> >>>>> a 4/3 adapter on the m4/3 body I think that would give me the
> >>>>> extra range I need to bring the image plane in and get the 50/3.5
> >>>>> to do 0.5X or
> >> slightly
> >>> smaller.
> >>>>>
> >>>>> So, can someone answer the physical compatibility question between
> >>>>> the two mounts, ie, will a 4/3 lens fit onto a m4/3 mount even
> >>>>> though it might not actually work electrically and certainly can't
> >>>>> focus even if it
> >>>> physically fits?
> >>>>>
> >>>>> Assuming it does, anyone got a spare OM to 4/3 mount you'd like to
> >>>>> move on? Maybe an old one with no AF confirmation chip? I won't
> >>>>> be needing anything like that.
> >>>>>
> >>>>> Chuck Norcutt
> >>>>> --
> >>>>>
> >>>
> __________________________________________________________
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> >>>>
> >>> --
> >>>
> __________________________________________________________
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> >>
> --
> __________________________________________________________
> _______
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