Canon's first-generation 18-135mm IS zoom for APS-C, before the STM motor upgrade.
The Canon EF-S 18-135mm f/3.5-5.6 IS is the original version of Canon's popular APS-C superzoom, launched around 2012. It covers a versatile 29-216mm equivalent range with image stabilisation. It was commonly bundled with mid-range bodies like the EOS 60D and 7D.
Optical quality is similar to the later STM version with good centre sharpness and typical superzoom corner softness at the extremes. IS provides approximately 4 stops of stabilisation. The key difference from later versions is the standard DC autofocus motor which is audible and not suitable for video work.
Canon EF-S mount only, 67mm filter thread. This was superseded by the IS STM version in 2013 and the IS USM version in 2016. Both successors offer quieter, faster autofocus. The original IS version is the budget option.
Very cheap used. The STM and Nano USM versions are better in every way and worth the small premium. If you find this version very cheaply it is still a capable walk-around lens for stills. Check IS operation and AF motor. Not recommended for video due to the noisy autofocus.