The Canon EF 75-300mm f/4-5.6 USM is a consumer-grade telephoto zoom for Canon's EF autofocus mount, introduced as a long-reach companion to entry-level EOS film and digital SLR bodies. It uses an ultrasonic motor (USM) for autofocus and was designed to give casual photographers an affordable reach to 300mm for sports, wildlife and travel.

At UK auction this lens trades as a budget telephoto: the only verified hammer result in our records is £50 from December 2023, reflecting wholesale saleroom level rather than retail. As of today in 2026, that single data point suggests clean working examples typically sell for similar low double-digit figures, and even mint copies rarely command a premium given how many were produced. Buyers wanting a sharper or more durable zoom usually move up to the L-series 70-200mm rather than chase pristine versions of this model.