Buy on Amazon.com : http://www.amazon.com/gp/product/B007SRXKTG?tag=lottalatte-20 <br /> <br />Soligor 135mm 1:2.8 f2.8 lens for Pentax Thread/Screw Mount (M42 mount) <br /> <br />Pentax ThreadScrew Mount M42 mount <br />Focal length 135mm <br />Can be adapted to use on Sony Canon Nikon pentax Nex M43 <br />Max aperture 28
