Matthew Granger wrote:
> Hi guys, does anyone know of an adapter that lets you use OM lenses on a
> nikon digital body?
Nope. Such a thing probably exists somewhere, smiply because people will
make anything. However, it's not a good idea.
The problem is what's called register distance, the distance from the
lens mount on the body to the image plane. Lenses made for each mount
take this into consideration.
Nikon register distance in 46.5 mm and OM is 46 mm. so even with an
adapter of zero thickness, an OM lens on a Nikon body would not focus to
infinity. The only solution is an adapter with a negative lens built
into it. This makes the effective combined focal length of lens plus
adapter long enough for infinity focus.
I really acts like a weak teleconverter. Not a terrible idea, but is
does introduce an additional lens into the system. So in the old days of
manual focus (MF) there were some such adapters. I don't know about OM
to Nikon, but I once tried an M42 to OM. The cheap ones use a single
element lens that was clearly not multi-coated. The whole business is
bound to introduce some image degradation.
So the answer is:
1. If you want to use your OM lenses on a DSLR, go Oly(4/3) or Canon.
Both have shorter register distances than the OM mount, so there is room
for an adapter with no optical elements. That is one significant reason
for several of the Canon DSLRs owned by list members. Although I now
mostly use AF lenses, I started out with a Canon 300D, mount converter
and OM lenses.
2. If you decide that Nikon DSLRs are what meet your needs, just get
Nikon mount lenses for them, current AF or old MF. Forget the OM lenses
for that mount.
Moose
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