Jim, Considerate well done info. Will forward to misguided 'friend'. Thanks all.
Jack --- Jim Colwell <[EMAIL PROTECTED]> wrote: > Yes, there is a Pentax-K to Canon EF (EOS) mount > adapter, available from > "Mr.Rolfo". I suggest that you contact him directly > at [EMAIL PROTECTED] for > more info. I have two of these adapters (which I > call the Keos mount), one > on a SMC Pentax 18/3.5 and the other on a SMC Pentax > 500/4.5 > > I'll be releasing a major update of my web site in a > month or so, and it > will include pics of the Keos adapter on these > lenses. Rolf will probably > send you his .pdf instruction file with pics and > German text if you contact > him. I am completely satisfied with this product > and may buy more in the > future, but once you get into Canon L-series lenses, > its hard to "go back" - > my SMCP 18/3.5 is now a backup for an EF L zoom > lens. > > In order to use this Keos adapter, or the SRB > conversion process described > by Cotty, your lens needs to undergo an aperture > leverectomy operation to > remove the aperture lever and its protective tab (if > present), as the EOS > body mirror box is too shallow around the edges to > fit the lens with the > aperture lever. As Cotty said, the lens then has a > manual aperture, which > means "stop down" metering (at least, you never need > to use the DOF button). > My 18/3.5 has been de-levered, but the 500/4.5 is > already a manual aperture > in its "as built" condition, so no mods were > required. The Keos adapter is > a very slender, solid metal ring with a Pentax K > body mount on the inside > surface and a Canon EF lens mount on the outside. > The pentax K lens mount > fits into the adapter, rotates about 30 degrees and > is secured from rotating > back by a single, very small set screw. The lens > with-adapter-attached then > mounts on the EOS body as a normal EF lens (but > manual focus and aperture). > The Keos adapter is easy to take off the lens, just > be careful not to drop > the set screw, it's very, very small. The adapter > is strong and secure. > I'm not sure if it would be a good idea to use it > with a really heavy lens > hanging from a camera on a shoulder strap attached > to the camera body, but > nobody would do that even on a real Pentax body, > right ? My 18/3.5 is very > light, and with the 500/4.5, you carry the lens, not > the camera. You should > know that you cannot simply remove the aperture > lever for use with Canon > bodies and later replace it for use with Pentax > bodies (at least for my > 18/3.5), as the "inside" part of the aperture > control mechanism is required > to control the aperture with the aperture ring. If > you remove this > mechanism entirely, then the aperture cannot be > controlled at all. It would > be nice to have two aperture control assemblies, one > with the lever and one > without. > > For more info on the "Keos" adapter (my name for > Mr.Rolfo's product), send > email to Rolfo at [EMAIL PROTECTED] > > For more information on the conversion described by > Cotty, you can contact > SRB directly through Ian R Broomhead > [EMAIL PROTECTED], and see > their web site at www.srbfilm.co.uk > > For more info on using non-EF lenses on Canon EOS > bodies, I highly recommend > that you should read NK Guy's article "Using manual > lenses and telescopes > with EOS cameras." at > http://photonotes.org/articles/eos-manual-lenses/ > > ciao for niao, Jim > www.jcolwell.ca > > > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
