Canon EF 300mm f/2.8 L IS USM

The Canon EF 300mm f/2.8 L IS USM is a fixed 300mm telephoto prime lens with a maximum aperture of f/2.8, built-in Image Stabilisation, a Ring-type USM autofocus motor, an 8-blade aperture, a 52mm drop-in filter slot, a minimum focus distance of 2.5m, and a weight of 2550g — built for Canon EF mount cameras.

Key Specifications

• Focal length: 300mm (prime)
• Maximum aperture: f/2.8
• Minimum aperture: f/32
• Lens mount: Canon EF
• Autofocus: Ring-type USM (Ultrasonic Motor)
• Image Stabilisation: Yes
• Aperture blades: 8
• Drop-in filter diameter: 52mm
• Minimum focus distance: 2.5m
• Weight: 2550g

What makes the Canon EF 300mm f/2.8 L IS USM special?

At 300mm and f/2.8, this lens sits in a very specific sweet spot: long enough for wildlife and sports isolation, fast enough to shoot in low light without pushing ISO through the roof. The f/2.8 aperture at 300mm produces a level of background separation that slower telephoto zooms simply can't match — subject pops off frame in a way that's immediately obvious.

The Ring-type USM motor is one of Canon's fastest and quietest AF implementations. It locks focus almost silently, which matters a lot when you're photographing skittish wildlife or don't want shutter noise to be the loudest thing on a sideline. Full-time manual focus override is available without switching any mode — you just grab the ring while AF is active.

The built-in Image Stabilisation makes handheld shooting genuinely practical at 300mm, a focal length where even slight camera shake translates to a blurred frame. The magnesium-alloy barrel construction and weather sealing mean this lens handles outdoor conditions — dust, light rain, cold — without special treatment.

Compared to the Canon EF 300mm f/4L IS USM, this f/2.8 version gives you a full stop of extra light, which translates directly into faster shutter speeds or cleaner images in difficult lighting. Against a zoom like the Sigma 150-600mm f/5-6.3 Contemporary, you trade flexibility for a noticeably brighter, optically purer image. The Sigma 120-300mm f/2.8 Sport offers zoom range at the same aperture but adds significant weight and bulk. If you need a pure prime solution that doesn't compromise on optical quality or AF speed, the Canon EF 300mm f/2.8 L IS USM is the reference point for DSLR telephoto shooting on Canon EF cameras.

The 52mm drop-in filter system lets you use thin gel or circular polariser filters inside the lens barrel — important because no front filter thread of normal size exists at this focal length and aperture. It's a smart design that keeps the filter workflow practical in the field.

Who is the Canon EF 300mm f/2.8 L IS USM for?

This is a specialist tool aimed at photographers who already know they need 300mm at f/2.8 — and that's actually a well-defined group.

Sports photographers shooting in indoor arenas, evening games, or any venue where light is limited will find f/2.8 essential. A stop faster than f/4 means you can shoot at a lower ISO or a faster shutter speed — both of which matter when you're trying to freeze a sprinter or a rugby tackle.

Wildlife photographers working in woodland edges, at dusk, or in overcast conditions will appreciate the same advantage. The 2.5m minimum focus distance is workable for larger animals — birds in flight, mammals at medium distance — and the IS helps when you're tracking unpredictable movement.

Photojournalists covering outdoor events, protests, ceremonies, or anything that requires reach without artificial light will find this lens delivers consistent results without post-processing heroics.

Studio and portrait photographers looking for an ultra-compressed 300mm background blur for creative portraits will find f/2.8 produces a look that's hard to replicate with any other focal length. At 2.5m minimum focus distance it's not a macro tool, but it's usable for tight environmental portraits.

If you're shooting a Canon DSLR system and you need reach, speed, and optical quality without compromises, this lens is the straightforward answer. It pairs especially well with mid-to-high-end Canon EF bodies that have fast burst rates and sophisticated AF systems.

Buying a used Canon EF 300mm f/2.8 L IS USM

Buying this lens second-hand is a well-trodden path — it's been in professional rotation for a long time, which means used copies are available in a range of conditions. Here's what to focus on when evaluating a pre-owned unit.

Image Stabilisation: Test the IS before committing. Listen for the stabiliser activating (a faint hum) and check that images shot handheld at low shutter speeds are sharper with IS on than off. A faulty IS unit is an expensive repair.

Autofocus accuracy and speed: The Ring USM should be near-silent and fast. Slow or hunting AF, or AF that consistently front- or back-focuses without adjustable compensation on the body, can indicate wear or calibration drift.

Front element and internal glass: Given the size and front element diameter, check carefully for dust, fungus, and coating wear. Small dust particles inside are cosmetically imperfect but usually don't affect image quality. Fungus and significant coating damage do.

Barrel and mount: The magnesium-alloy barrel is tough, but check the mount ring for play or wobble — any looseness between lens and body should be a reason to negotiate or walk away.

Drop-in filter slot: Check that the slot opens and closes properly and that no gel residue or filter fragments are trapped inside.

Every used Canon EF 300mm f/2.8 L IS USM sold through Camera-tweedehands.nl is individually photographed and comes with a minimum 12 months warranty. The exact warranty period is shown on the variant listing. For a lens at this price level, that kind of documented, inspected purchase makes a real difference versus a private sale.