nadelewitz wrote:
With one uncommon exception, all Asahi/Honeywell/Pentax Takumars are screw mount. As quoted from Wikipedia:
"Pentax resurrected the Takumar name in the 1980s and 1990s for a budget line of zoom and prime lenses that lacked the Pentax "Super Multi-Coating" anti-reflective coating that reduces lens flare. These lenses are marked "Takumar (Bayonet)" or "Takumar-F" to distinguish them from the older screw-mount Takumar lenses."
Thanks for the info. Didn't realize there were M42 mounts that were not screw mounts.