In the old days of film cameras there were dozens of "off brand" lenses for your SLR. Vivitar, Tamron and others come to mind. I don't recall Dejur lenses. My father had an 8mm Dejur movie camera.
The 135mm Dejur pictured above was a "throw in" with a Canon SLR I bought some time ago. I hooked it up to the FTb QL shown.
Dejur @f 2.8 - Above photos done by my wife.
Dejur @ f2.8
Canon 1.4 50mm @1.4
Kodak Gold 200