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Rent NowNOTE: Damaged filter threading. May affect ability to mount filter.
The Canon EF 75-300mm f/4-5.6 III USM is a compact, lightweight telephoto zoom lens designed for Canon EF-mount cameras, offering an easy way to extend reach for wildlife, sports, and general telephoto shooting. Compatible with both full-frame and APS-C Canon DSLRs, it succeeds the earlier EF 75-300mm f/4-5.6 II USM, retaining the same overall telephoto versatility in a proven, budget-friendly package.
Optically, the lens features a 13-element, 9-group construction covering a 75-300mm focal range, giving a variable maximum aperture of f/4 at the wide end and f/5.6 at full telephoto. On APS-C bodies, the effective focal range extends further due to the crop factor, providing a 120-480mm equivalent field of view useful for reaching distant subjects. Canon’s Super Spectra coating is applied to individual elements to minimize ghosting and flare, improving contrast and color neutrality in strong lighting, while a 7-blade diaphragm contributes to smooth, pleasing background blur.
Unlike the basic “III” version of this lens, which relies on the camera body’s focus motor, this USM variant includes its own Micro Ultrasonic Motor, delivering noticeably quick, near-silent, and precise autofocus performance suited to both stills and video, along with a switch to disengage AF for manual focusing. This built-in autofocus motor also means the lens will autofocus on any Canon EF-mount body, regardless of whether the camera has its own focus motor.
Handling is simple and lightweight, with a compact barrel design measuring approximately 4.8 inches long and 2.8 inches in diameter, along with a distinctive silver ring at the front of the zoom ring for a more upscale appearance. The lens has a minimum focusing distance of about 1.5m (4.9 ft), yielding a maximum magnification of 0.25x at 300mm, allowing photographers to fill the frame with small objects for modest close-up work in addition to standard telephoto shooting. It accepts 58mm filters, and is compatible with Canon’s 58mm Close-up Lens 500D for extended close-focus capability.
As an entry-level telephoto zoom, the EF 75-300mm f/4-5.6 III USM does not include image stabilization or weather sealing, so photographers should account for faster shutter speeds when shooting handheld at longer focal lengths, especially in lower light.
Key Features
– 75-300mm telephoto zoom for Canon EF mount
– Maximum aperture f/4-5.6 (variable)
– Micro Ultrasonic Motor (USM) autofocus with AF/MF switch
– 13 elements in 9 groups optical construction
– Super Spectra coating
– 7-blade diaphragm
– Minimum focusing distance of approximately 1.5m (4.9 ft)
– Maximum magnification of 0.25x (at 300mm)
– 58mm filter thread
– Silver accent ring on zoom ring
– Compatible with full-frame and APS-C Canon EF-mount cameras
