Chuck:
4/3 lenses only fit on m4/3 with an adapter (MMF2 or 3, I think). So,
your OM to 4/3 will not fit either.
I thought that the crop factor on the 4/3 (or m 4/3) sensor gave greater
magnification than on 35mm (or full frame). I'll let others correct me here.
Martin
On 14/05/2013 7:40 PM, Chuck Norcutt wrote:
> 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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