Best Vintage Lens which I ever used. Build in 1965: Super-Takumar 1:1.4/50 - late version, some have a white dot on the aperture ring. Full Metal construction. The 7 element Takumars have the infrared focusing mark to the left of the numeral '4' on the DOF scale. The 8 element version has the mark to the right. I am using this lens on Canon 550d Camera. I mostly use this lens for video. I used this lens in two commercials which we made.