Originally posted by Trysaeder Ken Rockwell has tons of information on this area that is also irrelevant to photography.
-100 for quoting ol' Ken.
At best, he needs to be taken with a giant grain of salt. At worst, he can be dead wrong.
Originally posted by Trysaeder I'm surprised at the 'more lens choices' argument coming from a pentax user, especially when Canon has about 9 more lenses than Nikon, and the lead goes heavily to Nikon if you include backwards compatibility. If there ever was any concern about AF on entry bodies and older lenses, then the person is probably looking at lenses that no entry level buyer would use. Nikon allows the OPTION to put on older lenses with quirks and issues, but canon has none.
The "option" Nikon gives you as far as mounting old lenses is without AF and even without metering. Also, due to the registration distance, only Nikon lenses. Oh, wow.
Whereas the option that Canon allows, due to shorter registration distance and the fact that all Canon bodies will attempt to meter (in stop-down metering mode) pretty much no matter what you put on there, via a mount adapter. (Except old Canon FD glass, which is odd.) You can put Nikon F, Pentax K, M42, OM mount on and it'll work. Including outrageous stuff like metering. Nikon will not meter, for some bizarre reason.
Originally posted by Trysaeder I wonder how many people use 'old AI lenses on entry-level bodies' and if there is a single person in my state that does this.
Well, with Nikon, probably zero, because it doesn't work well.
On my Canon Rebel XTi, a low-end body if there ever was one, I had no problem mounting all sorts of non-EF mount lenses on it. Cheap body, full functionality. Pretty cool... and as I said, one of the things that drew me to the Canon system.
Originally posted by Trysaeder IIn contrast, how many people have APS-C specific lenses and a fullframe body at the same time? While canon has no option of mounting them onto the fullframe body, nikon allows it and it works acceptably with the full imaging circle with certain lenses, such as the 35/1.8 and 11-16.
It's true, K-Mount lenses will mount on a Full Frame EOS digital/film camera, but the mirror will probably hit the K aperture stop-down lever. That's a bummer. Some Canon folks trim off the lever and it works. I would never do that, but it's at least possible.
But speaking of odd things to complain about on a Pentax forum, when there is no FF Pentax DSLR available...
Anyway, enjoying my K-5 with my assortment of K-mount glass. The Pentax Green Button makes it easiest of all to enjoy the older Pre-A glass. Love it!