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Canon EF 300mm f/4.0 L IS USM : Specifications and Opinions

Canon EF 300mm f/4.0 L IS USM

The Canon EF 300mm f/4.0 L IS USM is a tele lens for FF and APS-C, manufactured from 1997 to 2022 (discontinued). The focus is done by Ultrasonic AF Motor (Ring-USM), it has image stabilization. The average price was 1490 €;

107 users have given it an average vote of 9.3 out of 10.

MOUNT

This lens is available with the following mounts:

Canon EF: this lens is compatible with reflex fullframe and APS-C Canon EF.

Specifications
Focal lenght	300 mm
Angle of view	8.3°
Format	FF, APS-C
Max. aperture	f/4
Aperture blades	8
Lenses/Groups	15 elements in 11 groups
Min. focus distance	1.50 meters
Reproduction ratio	0.24x
Features
Stabilization	Yes (built in lens)
Focus	Ultrasonic AF Motor (Ring-USM)
Internal Focus	Yes
Built and notes
Tripod ring	Yes
Extenders	Yes
Filters	77 mm
Lens hood	Built-in
Weather sealing	No
Weight	1190 g
Dimensions	90 x 221 mm
Buy
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Reviews

What do you think about this lens?

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Jack Jaeger Jr

sent on November 17, 2014

Pros: Size, Weight, Construction, I.S., ease of use.

Cons: None to date.

Opinion: I have the 24-105, and 500mm and needed something in between. I had the 100-400 in the past and sold it. I liked the 100-400 for versatility but I didn't seem to get a lot of keeper shots with it. I choose this lens for the weight and price. I backpack a lot and need a lens of this length for nature shots without a lot of weight. I have been very satisfied with this lens so far I have taken very good macro shots in my wifes flower bed and great sport shots at my Granddaughters soccer games. I would recommend this lens to Juza followers.

The following opinions have been automatically translated with Google Translate.

Alessandro_Gennari

sent on October 14, 2025

Pros: Price in the second-hand market, stabilization, sharpness, built-in lens hood, weight

Cons: Autofocus sometimes unresponsive

Opinion: I had already owned the smooth version, resold to finance other lenses at that time more necessary for my work needs, but as soon as I had the opportunity I immediately put it back in the kit. It is true that for sports and action photos, especially indoors, the 2.8 would be more suitable, but price, weight and size clearly play in favor of its f/4 brother. Sometimes the autofocus is not very responsive and this may not be good in certain more dynamic situations, but otherwise it largely does its job. For the "portrait round" during the warm-up in volleyball matches - where I don't have access to the court - it's great because it allows me to "paparazzi" even the most distant athletes who with the 70-200 would force me to a robust crop. Among the points most in its favor, portability: the relatively low weight and the built-in hood are an absolute plus. Sharpness and IQ in combination with the R6 are also excellent. On APS-C it also becomes a 480mm f/4. It is not tropicalized, so be careful in case of outdoor use but on the other hand it is robust and excellently built. Once you take the measurements (it is a fixed lens with a wide focal range, and in certain situations it can be a problem), it is a lens that gives great joy. Great job, Canon mom!

Gion65

sent on August 21, 2025

Pros: Sharpness Sharpness Sharpness Color Color Boken Boken Boken

Cons: Not having it.

Opinion: A superlative lens that I also use for Macro photography, impressive sharpness, very bright, the blur is creamy.. and the color is gorgeous.. Autofocus is not lightning. but it is a lens that is many years old and even the stabilization is slightly noisy. but they are trifles .. and the photographs he returns in return are exceptional. Taken used will be the last lens I will give away.. It is always a guarantee to have it with you.

Eliad

sent on March 05, 2024

Pros: Portability - Built-in lens hood - F4 - Minimum focusing distance 1.5 meters

Cons: for current cameras a bit slow for dynamic situations - a bit soft at f4

Opinion: Excellent lens to start with also associated with APSC compatible with 1.4x EsExtend Mark II (not III associate the color!) currently in the used it is between 600/700 euros excellent deal to start photographing animals, of other Leni at that price do not exist. I've had it for years, I enjoyed it! Then I gave it away for the 70-200 2.8 Mark II sharper brighter lens with stabilizer great for video and photos

PaoloMcmlx

sent on April 25, 2021

Pros: Excellent sharpness, excellent flare resistance, excellent yield also with the 1.4 X II extender, non-existent distortion, fast and precise AF, excellent RR, excellent construction, also relatively light, very manageable, archaic stabilizer but that still allows it to be used quite easily even at 1/8 sec. freehand, a gem of other times finally the telescopic and lockable lampshed in the working position.

Cons: Basically none, in limit conditions just a minimum of lateral color when used with the 1.4 X II extender.

Opinion: A simple goal, really very solid, on which you can always rely, infatible as a mule... in the truest sense of the word, also extremely manageable by virtue of its very low weight and size. In short, an objective that perhaps does not make us cry out for the miracle, but from which it is almost impossible to separate.

There are 31 more reviews. Show all »

Photos taken with Canon EF 300mm f/4.0 L IS USM

Wildlife - Norway, Svalbard 2010

by Gian Mario Zaino
167 comments, 48168 views [editors pick]

Eye to Eye

by Kornienko
74 comments, 20644 views [editors pick]

HI RES 10.5 MP

Red Squirrel

by Alessandro Moneta
152 comments, 36675 views [editors pick]

At the crossroads

by Kornienko
66 comments, 14431 views [editors pick]

HI RES 16.9 MP

Untitled Photo

by Roberto Nencini
120 comments, 11842 views

Paras

by Leonardo Battista
72 comments, 6496 views [editors pick]

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Eagle owl Bubo bubo (Linnaeus, 1758)

by Joeb
104 comments, 12788 views

HI RES 4.2 MP

FOR ODINOOO BEARD !!

by Gion65
148 comments, 4889 views

HI RES 6.0 MP

A hole for two

by Andy 66
76 comments, 9985 views

If you don't behave well this year.....

by Gion65
145 comments, 4467 views

HI RES 6.7 MP

Sunset silhouette

by Jooferr
74 comments, 7788 views

Kingfisher

by Daniele Porro
100 comments, 5217 views

Hey, beautiful, what are you doing 'tonight?

by Joeb
181 comments, 10958 views

HI RES 4.2 MP

Roars echo in the forests

by Dario Bonzi
61 comments, 7383 views

HI RES 3.8 MP

In the blue, painted blue ...

by Gian Mario Zaino
48 comments, 12888 views

Nuthatch (Sitta europaea)

by Joeb
163 comments, 9693 views

HI RES 4.2 MP

Ligurian Sea in the trough

by Carlo Lovisolo
44 comments, 5941 views

And I look at a world from a porthole ....

by Gion65
115 comments, 3674 views

HI RES 24.0 MP

I do not see I do not feel I do not speak

by Kruzzolo
58 comments, 7606 views

HI RES 15.5 MP

In mist ...

by Joeb
173 comments, 7355 views

HI RES 4.2 MP

Snowy egret

by Gian Mario Zaino
84 comments, 11463 views

Sitta europaea - Nuthatch

by Joeb
153 comments, 7036 views

HI RES 4.2 MP

Yesterday and today

by Jooferr
57 comments, 6246 views

Spotted Nutcracker (Nucifraga caryocatactes, Linnaeus 1758)

by Joeb
134 comments, 4889 views

HI RES 4.2 MP

Molise Hills

by Francesco Iafelice
127 comments, 5264 views

HI RES 11.8 MP

Squirrel (Sciurus carolinensis Gmelin, 1788)

by Joeb
134 comments, 6476 views

HI RES 6.0 MP

A nice surprise

by Latino Rosario
134 comments, 6202 views

HI RES 10.9 MP

White-tailed eagle

by Cesare Carloni
117 comments, 4361 views

Portrait of the Robin

by Latino Rosario
104 comments, 4342 views

Ape Chef... And if this time I used rosemary... ?

by Gion65
102 comments, 1807 views

HI RES 24.0 MP

White-tailed Sea Eagle

by Cesare Carloni
104 comments, 3171 views

HI RES 4.3 MP

Green and cardellino

by Daniele Porro
67 comments, 3745 views

White-tailed sea eagle

by Cesare Carloni
96 comments, 3429 views

HI RES 3.9 MP

Crested Tit

by Joeb
136 comments, 7593 views

HI RES 4.2 MP

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Tennis player

by Sergik
58 comments, 2821 views

HI RES 6.3 MP

Chinese woman

by Jooferr
77 comments, 5873 views

HI RES 20.0 MP

Dressed in red

by Mida Photo
51 comments, 3405 views

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Reviews » Lenses » Lenses Canon » Canon EF 300mm f/4.0 L IS USM

Canon EF 300mm f/4.0 L IS USM : Specifications and Opinions

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Reviews

What do you think about this lens?

Photos taken with Canon EF 300mm f/4.0 L IS USM