Originally posted by niceshot you sound as if you have some experience with this where were you yesterday? lol any way this lens is unique in that it is not multicoated, so it renders different which I like. there is a certain something about this lens. By the way I HAVE the Sears lens which is different, I ALSO THINK IT IS NEWER that it is a different lens altogether. BUT I guess they are both made by SamYang
Sears 135's in K-mount had at least 2 seperate manufacturers. The linked one which is Samyang, and Tokina. They're easy to tell apart - the Samyangs are stamped "Made in Korea" and "Model 202", have green and yellow text, and sport a greenish multicoating.
The Tokina 135's are black and with silver piping and the only bit of color on the face is the 'MC' which is red, and have a purple multicoating. They're stamped "Made in Japan."
The 202's also come in A and non-A versions. The A versions carry the Ricoh pin (look it up if you aren't familiar), which needs to be dealt with in some manner if you want to use the lens without risk of jamming the lens on the camera.
As far as I know, the Tokina doesn't have a macro version, and is generally sharper at wider apertures..