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 APS-C superzoom kit, released in 2007 before the STM and Nano USM variants. It covers a 29-216mm equivalent range, providing standard and moderate telephoto reach without a lens change. The IS system was rated at approximately 3.5 stops; the DC micro-motor autofocus was adequate for stills but audible and unsuited to video recording. It was succeeded by the IS STM version (2012), which addressed the video AF limitation.
The optical design uses 15 elements in 12 groups, including one UD element and one aspherical element. The 67mm filter thread is consistent across Canon's EF-S 18-135mm family. At approximately 455g the lens is moderate in weight for its zoom range. Minimum focus distance of 0.45m suits general and close-up use at the wide end. IS provides approximately 3.5 stops of shake correction for static subjects handheld. The DC micro-motor AF is functional and reliable for stills but audible during operation and not suited for video recording. Variable aperture runs from f/3.5 at 18mm to f/5.6 at 135mm.
For stills-only APS-C use the original 18-135mm IS covers the standard superzoom range adequately — landscapes, events, and travel subjects across the 29-216mm equivalent. The DC motor AF is reliable for static and moderately moving subjects in good light. For video the motor noise disqualifies it from serious use; the STM version (2012) addresses this directly. Optical quality is acceptable across the zoom range at mid-apertures; corners at 18mm and 135mm wide open soften.
On the used market the original 18-135mm IS is among the lowest-priced Canon APS-C superzoom options. The IS STM provides a meaningfully better experience at a modest premium — it is the recommended choice for video use or buyers who want smoother operation. Condition checks: IS engagement, DC motor AF response at both focal length extremes, and zoom ring smoothness. Compatible with all Canon APS-C EOS DSLRs and via EF-EOS R adapter on RF-mount bodies.