The Canon EF 35-70mm f/3.5-4.5. This one is dated Nov 1987. (UB1103).
It is a decent lens but not quite as good as the EF 28-70mm 3.5-4.5 II. This one is smaller and less expensive though. This is one of Canon's few lenses where the filter thread retracts into the lens at some focal lengths. The above mentioned 28-70 does also as does the 28-80mm f/3.5-5.6 USM (original version). Canon also made a less expensive 'A' version (autofocus only) of the 35-70 that omitted the focus ring, M/AF switch, and distance scale and weighed a bit less.










