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Canon EF 300mm f/4L IS USM Lens Review

The Canon EF 300mm f/4L IS USM is a relatively inexpensive professional grade telephoto prime lens designed for Canon full frame digital SLR cameras. It can also be used on Canon APS-C bodies and will provide an equivalent field of view to a 450mm lens on a full frame body.

The lens features a relatively fast f/4 maximum aperture for work in lower light than the consumer 70-300mm zoom lenses that are a full stop slower at 300mm than the Canon EF 300mm f/4L IS USM.

I have not formally tested this lens yet, but plan to in the future. Generally the lens is favorably reviewed by photographers who own and use it.


  • Canon EF 300mm f/4L IS USM - $1349.99

*Pricing from Manufacturer's website - Current selling price may be different.

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Overall User Rating

4.76 out of 5

based on 394 user reviews online.

: 77% (302.1)
: 19% (76.05)
: 3% (9.95)
: 3% (13.4)
: 1% (2.95)



Focal Length 300 mm
Max Aperture f/4
Minimum Aperture f/22
Minimum Focus distance 59.04 inches
Maximum Magnification 0.24x
Number of Elements 15
Number of Groups 11
Aperture Blade Design Hexagonal
Number of Aperture Blades 8
Filter Size 77 mm
Diameter 3.5 in.
Length 8.7 in.
Weight 2.62 lbs.
Lens Mount Construction Metal
Tripod Collar Included
Weather Sealed Yes
Distance Scale Yes - With Hyper Focal Markings
Image Stabilization Yes
Lens Shade Included

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