Legend has it the phrase "Tak Sharp" comes from this line of vintage takumar Pentax lenses. Whether the legend has any truth to it or not, it is certainly understandable. The Asahi "super-taks" are some of the best optics ever produced and truly a legend in the camera industry. To this day these 40-50 year old lenses are cherished by serious photographers, amateur and pro alike, for their incredibly sharp optics and exceptional bokeh. Quality superior to many far more expensive lenses these little gems have truly stood the test of time while still fitting any photographers budget. If you don't have a super-tak or two in your bag already, you don't know what you're missing! The 50mm F1.4 is perhaps the most sought after of the Super Taks. With a more popular, smooth, creamy bokeh, large aperture for shooing low light, and the tack sharp clarity of all the old Super Taks, this is possibly the most sought after Pentax lens ever. Fantastic lens whether shooting portraits or video. Don't miss out on this gem in excellent condition. Smooth focus ring, snappy aperture, clean blades and glass. Comes with both front and rear lens covers. Made in Japan. As this is a Pentax M42 ("screw") mount lens it it easily adaptable to most film and digital camera bodies. Can be used on Canon, Pentax, Sony DSLRs, and digital mirror less cameras (micro 4/3, sony nex, pentax q, fuji x, samsung nx, etc) with an adapter. This lens does not have the heavy yellow glass discoloration that affects so many of these older Takumar 1.4 lenses. Plus it has been UV-treated just to reassure that. FREE GIFT WITH PURCHASE (for those shooting with Canon DSLR): NEW CANON ADAPTER! Here you can see the sample video shot with this amazing Super Takumar lens on Canon DSLR. https://www.youtube.com/watch?v=GZkPt1Ll2-E You can also read about this lens here: http://www.luminous-landscape.com/columns/sm-02-11-24.shtml