Cory Papenfuss wrote: >> I have a Canon 10D, and a M42 adapter, if you want to shoot with it >> for a day. Get in touch, and we can set something up. >> >> The 10D was the last Canon DSLR with a full size mirror. Starting >> with the 20D & the Digital Rebel cameras, they introduced the Canon >> EF-S lens mount. They made the mirror a little smaller, so they could >> project the rear lens element deeper into the camera body. You should >> care, because you can mount a K-Mount lens on the camera with an >> adapter. (the aperture lever on a K mount lens interferes with a full- >> sized mirror) (search e-Bay for "Pentax K Lens to Canon EOS") >> >> Canon disables focus confirmation on non-EOS lenses. But you can glue >> a "chip" to the adapter to fool the camera into thinking it is a >> Canon lens. The advantage- focus confirmation works. (Search e-Bay >> for "EOS auto-focus module") >> > IMO, a perfect example of Canon just plain being evil. I never > realized how much I subconsciously used the focus confirmation on my MF > lenses with my -DS until I tried using some on my friend's RebelXT. > Between the bad viewfinder and lack of focus confirmation, it's extremely > difficult to focus MF lenses. > > -Cory >
Actually it's merely an example of how the Canon AF system works. A fair bit of the AF processing in the Canon's is in the lens, so without a lens chip, no AF as you don't have the full AF system present, this is why issues will come up with Canon with some lenses having improved AF algorithms. Pentax and Nikon do everything in-camera and rely on the lens only for data (max aperture, focal length and focused distance[the last if available]) -Adam -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
