Here we have yet another 135mm lens from the 80's. This is a consumer grade lens that was sold by Kmart. The manufacturer is unknown. It is built solid and heavy. Focus is well dampened. It is a bear to use on the EOS M3. At f2.8 it is reasonably sharp. It does suffer from fringing and contrast is a bit soft. The light was quite bad today so I will do further testing of this lens. So far it looks like the typical 135mm from the 80's.