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Canon EF 300mm f/2.8 L IS USM

The Canon EF 300mm f/2.8 L IS USM is a 300mm f/2.8 lens designed for Canon EF mount cameras. Check GearFocus for current availability, with buyer protection on every purchase.

Canon EF 300mm f/2.8 L IS USM

Canon EF 300mm f/2.8 L IS USM

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Lens Overview — Canon EF 300mm f/2.8 L IS USM

The Canon EF 300mm f/2.8 L IS USM is a professional telephoto prime lens built for Canon EF mount cameras, covering a full-frame image circle. With a fixed focal length of 300mm and a maximum aperture of f/2.8, this lens sits firmly in telephoto territory, offering a wide maximum aperture that allows for substantial light gathering and subject separation at distance. The lens supports both autofocus and manual focus operation, giving photographers the flexibility to switch between modes depending on their shooting situation.

Optical image stabilization is built in, helping to counteract camera shake during handheld telephoto shooting. The filter thread measures 52mm, which is notably compact relative to the lens's overall size and weight. Speaking of weight, the lens comes in at 2,550g, which is substantial and something prospective buyers should factor into their kit planning, particularly for extended handheld use or travel.

Designed specifically for the Canon EF mount system, this prime is compatible with Canon's broad range of DSLR bodies. For photographers who demand a fast, fixed 300mm option on a full-frame Canon DSLR platform, this lens represents a serious long-glass option worth considering.

Key Features — Canon EF 300mm f/2.8 L IS USM

300mm f/2.8 Prime: Fixed 300mm focal length with a wide f/2.8 maximum aperture delivers strong light gathering and shallow depth of field for subject isolation at distance.

Full-Frame Coverage: Designed to cover a full-frame image circle, ensuring no vignetting on Canon's largest-sensor DSLR bodies.

Canon EF Mount: Compatible with the full range of Canon EF-mount DSLR cameras, including full-frame and APS-C bodies.

Optical Image Stabilization: Built-in IS system compensates for camera shake, extending the practical range for handheld shooting at 300mm.

Ring-Type USM Autofocus: Ultrasonic motor delivers fast, near-silent autofocus with full-time manual focus override without switching modes.

L-Series Optical Construction: Canon's professional L-series build includes fluorite and UD elements to control chromatic aberration and maintain sharpness at f/2.8.

Lens Specifications — Canon EF 300mm f/2.8 L IS USM

Canon EF 300mm f/2.8 L IS USM full specifications
SpecDetail
Use CasesSports, Wildlife, Birding, Portrait
Lens TypePrime
FormatFull Frame
Zoom/PrimePrime
Focal Length300mm
Maximum Aperturef/2.8
Camera SystemDSLR
Lens MountCanon EF
AutofocusYes
Focus TypeAuto, Manual
Image StabilizationOptical
Filter Thread52mm

Description — Canon EF 300mm f/2.8 L IS USM

The Canon EF 300mm f/2.8 L IS USM is a 300mm telephoto prime designed for Canon EF mount DSLR cameras, with full-frame coverage ensuring the lens performs across Canon's complete sensor range without cropping concerns. The f/2.8 maximum aperture is a standout characteristic at this focal length, providing meaningful light-gathering capability that opens up shooting possibilities in lower-light environments. Optical image stabilization is integrated into the lens, offering a useful tool against camera shake that becomes increasingly noticeable at longer focal lengths like 300mm. Autofocus and manual focus are both supported, with the focusType listed as Auto and Manual, allowing shooters to match the focus mode to their subject and style.

The lens accepts 52mm drop-in or front filters, a practical size for this class of optic. At 2,550g, this is a heavyweight lens that demands thoughtful handling — a monopod or tripod collar setup is worth considering for any sustained shooting scenario. Built for the Canon EF ecosystem, it integrates naturally with the full range of compatible Canon DSLR bodies.

Pros — Canon EF 300mm f/2.8 L IS USM

  • ✓Wide maximum aperture of f/2.8 at 300mm allows for strong light gathering in telephoto situations
  • ✓Full-frame coverage (lensFormat: Full Frame) means no vignetting on Canon's largest sensor DSLRs
  • ✓Optical image stabilization helps reduce camera shake during handheld shooting

Cons — Canon EF 300mm f/2.8 L IS USM

  • ✗Weight of 2,550g makes this a demanding lens for extended handheld use or travel
  • ✗Fixed 300mm focal length offers no zoom flexibility — subject distance determines framing entirely
  • ✗Canon EF mount is DSLR-specific; native mirrorless use requires an adapter

Reviews — Canon EF 300mm f/2.8 L IS USM

Videos — Canon EF 300mm f/2.8 L IS USM

Canon 300mm f2.8 MK I Vs. MkII — Dan Carr

Resources & Downloads — Canon EF 300mm f/2.8 L IS USM

Manuals & Guides

Frequently Asked Questions — Canon EF 300mm f/2.8 L IS USM

What camera mount does this lens use?+
This lens uses the Canon EF mount, making it compatible with Canon EF-mount DSLR cameras. It is designed specifically for the DSLR camera system and covers a full-frame image circle.
Does this lens have image stabilization?+
Yes, the lens includes optical image stabilization as confirmed in the specifications. This helps compensate for camera shake, which is particularly useful when shooting handheld at 300mm.
What is the maximum aperture of this lens?+
The maximum aperture is f/2.8. This wide aperture at 300mm allows for considerable light intake and is one of the defining characteristics of this prime lens.
How heavy is this lens, and is it practical for handheld use?+
The lens weighs 2,550g according to the specifications. This is a significant amount of weight to support handheld, and photographers planning extended shooting sessions should consider using a monopod or tripod for comfort and stability.
What filter size does this lens accept?+
The lens has a 52mm filter thread size. This is relatively modest for a telephoto prime of this aperture, though buyers should verify compatibility if they plan to use existing filters from other lenses.
Is this lens a zoom or a prime?+
This is a prime lens with a fixed focal length of 300mm. There is no zoom capability — the focal length does not change, so repositioning or cropping in post are the primary ways to adjust framing.

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