SMC/S-M-C/Super Takumar 50mm F1.4 Reviews - M42 Screwmount Normal Primes - Pentax Lens Reviews & Lens Database,Amazon.com : PENTAX Pentax Asahi Super Takumar 50mm f1.4 M42 Screw Munt Prime Lens for SLR DLSR Cameras (Renewed) : Electronics,SMC Takumar 1.4/50 w/hood,Amazon.com : PENTAX Pentax Asahi Super Takumar 50mm f1.4 M42 Screw Munt Prime Lens for SLR DLSR Cameras (Renewed) : Electronics,Takumar 50mm f1.4 is one of the very best vintage lenses. Here's a review of the four M42 versions.