Canon 100-300mm f/4.5-5.6 USM Lens

I want to flag this one — there are a couple of distinct Canon 100-300mm lenses (an older FD-mount manual lens and an EF-mount f/4.5-5.6 USM), and the USM autofocus version’s specs differ depending on whether it’s the original USM or the later non-L “USM” variant. Let me search to confirm the exact specs before writing the description.The Canon EF 100-300mm f/4.5-5.6 USM is a telephoto zoom lens for Canon EF-mount cameras, offering a practical and portable focal range suited to general telephoto and outdoor photography. The variable aperture ranges from f/4.5 at the wide end to f/5.6 at full telephoto extension. Autofocus is driven by a Ring USM motor for fast, quiet performance, with full-time manual focus override available by simply turning the focus ring. The lens uses a rear focusing design, meaning it does not change length or rotate during autofocus, which keeps filter effects such as polarization intact. A metal lens mount adds durability to the build. The lens is compatible with full-frame and APS-C Canon EF-mount bodies, and can be used on RF-mount cameras via Canon’s EF-EOS R adapter.

– Canon EF mount telephoto zoom lens
– 100-300mm focal length range
– f/4.5-5.6 variable maximum aperture
– Ring USM autofocus motor with full-time manual override
– Rear focusing design (no rotation or length change during AF)
– Metal lens mount
– Compatible with full-frame and APS-C Canon EF-mount bodies
– Usable on RF-mount bodies via EF-EOS R adapter
– No optical image stabilization
– Filter thread: 58mm
– Minimum focus distance: 1.5m (4.9 ft)