The Canon 135mm f/2 EF L Ultrasonic is a short telephoto prime built for the Canon EF autofocus mount, an L-series optic with a fast f/2 maximum aperture and an Ultrasonic Motor (USM) autofocus drive. It was designed for portraiture, indoor sports and available-light work where subject isolation and quick, quiet autofocus matter.

The available UK auction-hammer evidence is thin: a single recorded result at £180 in November 2025, which sets the only current data point for what this lens sells for at saleroom level. Because that price reflects a wholesale auction hammer rather than a dealer or retail figure, the realistic value to a private buyer in 2026 will sit above that number, and a wider sample is needed before a reliable median or range can be quoted.