Pardon me for jumping in...
Andrew Fildes <afildes@xxxxxxxxxxxxxx> moved upon the face of the 'Net and
spake thusly:
> It's me struggling to find something to call it - adaptor ring might have
> been better! Basically, a ring with an Oly bayonet on one side and a screw
> mount opening in the other. Pentax made one for mounting M42 screwmount
> lenses on a K mount body, so did Canon I think and I have a Minolta version
> too. They're usually called P adaptors and you often need a little flat
> wrench to remove them.
Hmmn, I've got one of them for K mount (too bad I don't have any
K-mount bodies).
I don't know if they exist for OM (and I'd give your eye teeth for one
if they do), but you won't get infinity focus with one of those---the
OM mount distance is greater than the M42 mount distance (admittedly
by only half a millimeter).
The lens in my OM-M42 adapter screws out, so if I'm doing macro I can
remove the lens and do away with its associated quality loss. M42
bellows are dirt cheap these days, so that's my current macro route.
In other news, I have a 39mm (male) to 42mm (female) adaptor, but have
never seen the reverse.
It'd probably be fairly easy to get a T-thread to M42 thread ring
custom machined.
As for the OM-to-M42/L39 route for bellows, there is *always* the
Lens-Converter Of Last Resort: An OM-body cap epoxied to an M42 rear
lens cap, with the light-obstructing plastic cut away.
--cjb
--
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--- Christopher Biggs - Stallion Technologies - chris@xxxxxxxxxxxxxx ---
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