Canon’s 18-135mm STM zoom tested: compelling, or compromised?

Last month, Canon coupled the announcement of its new Rebel T4i digital SLR with the launch of two new lenses: the EF 40mm f/2.8 STM pancake prime, and the EF-S 18-135mm f/3.5-5.6 IS STM zoom. The folks at LensRentals recently tested the pancake prime, and now they've followed up with a look at the 18-135mm travel zoom.

As LensRentals' Roger Cicala notes, they didn't stock the earlier non-STM version of the lens, and so while the optical formula has been reworked, he can't provide a direct comparison with the predecessor. What he does do, though, is offer an interesting parallel with the EF-S 15-85mm f3.5-5.6 IS USM lens, which has a shorter focal length range, but a similar maximum aperture.

We won't spoil the results; for the full story, hop on over to the LensRentals blog!