>From: Kostas Kavoussanakis <[EMAIL PROTECTED]> >I got my Fish-eye Takumar 17/4.0 and it looks *lovely*. I also bought >an adaptor (Asahi Pentax, so probably an early one) which clicks >reassuringly in the mount. However, I notice that when I screw the >lens in, the orange dot does not align perfectly with the middle of >the camera. Is that OK, or is there a problem?
There is no precise alignment for screw-mount lenses, due to manufacturing tolerances and brand-differences. They all seem to work fine no matter where they actually align. Since the M42-K converter is basically just an insert to make the inside of the K-mount smaller and threaded, it should work the same as an actual M42 mount. The lack of precise alignment is one of the problems of the screw-mount and one of the reasons for a bayonet-mount system. The Spotmatic F and SMC Takumar lenses needed a special lug to index the open-aperture metering system due to this variability. DJE
