I've got a Canon 20D on order (which will come in "when it comes in", according to my supplier) with the single intent of being a digital imaging back for my M42 lenses. I decided that for me the 20D was a better option than the Pentax models currently on the market.
For most of what I'd like to do, I've got the glass I need (that's why I bought the camera...) but that nasty 1.6x crop factor means that my 20/4.5 is going to frame like a 32mm lens, leaving me a little weak at the wide end. I'm quite used to having a 28mm lens field of view availible. I've got a Tamron adaptall 17/3.5, but it doesn't have an A/M lever and the Canon obviously doesn't have a Spotmatic push-plate, so it's a 17/3.5 ONLY unless I tape over the pin or something equally drastic. I've got a 17/4 Takumar fisheye, so if I can figure out exactly the right correction I can rectilinearize it on the computer, but this lens has its issues in use. What other options have I got? Are the 15/3.5 SMC-Takumars actually availible now and then? From what I've seen I'd probably pay less than $1000 if I could find one. Nobody seems to make a 14mm in adaptall or M42 mount. I've seen a Sigma 18/3.2 listed in M42 mount, but I'm reluctant to commit money to a lens that may not have an A/M lever and probably has old Sigma "quality" as well. DJE
