See also Roxsen Converter Review
Nikon G to Canon EOS Adapter. Weird but true, this crazy adapter lets you actuate the diaphragm of G lenses, like Nikon's latest extraordinary 14-24mm, for use on Canon. Used on the Canon 1Ds Mk III , you can get better images than you can from anything from Nikon. Weird but true!
STRANGE BUT TRUE!!
You can get an adaptor to put Nikon lenses on Canon EOS film and digital cameras.
Canon cameras have a shorter distance between the lens flange and film plane than Nikon. Therefore there are a couple of millimeters left over into which a metal mounting adaptor can fit.
Look out: these things are so weird that the photos at some of the sites erroneously show the even more bizarre reverse adaptor for Canon which couples the electronic contacts from the one end of the lens to the other. The one they're selling at those links is the one you want which is just a slim metal ring. You want the $200 one. The reverse adaptor you don't want is $400.
Oddly, Nikon manual focus lenses on most Nikon AF cameras are almost useless and provide no metering. These same manual lenses used with these adaptors on Canon EOS cameras provide metering, more function than on most Nikon AF cameras. Strange but true!
Here's a much bigger page with a lot more details.
I bought one of the Roxsen adapters with AF confirmation in September 2007. See my Roxsen review for explicit details.
SRB-Griturn make weird stuff, too.
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