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Canon RF 400mm f/2.8 L IS USM : Specifications and Opinions

The Canon RF 400mm f/2.8 L IS USM is a supertele lens for FF and APS-C, manufactured from 2021. The focus is done by Ultrasonic AF Motor (Ring-USM), it has image stabilization. The average price, when it has been added to the JuzaPhoto database, is 13000 €;

10 users have given it an average vote of 9.9 out of 10.

MOUNT

This lens is available with the following mounts:

Canon RF: this lens is compatible with mirrorless fullframe and APS-C Canon RF.

Specifications
Focal lenght	400 mm
Angle of view	6.2°
Format	FF, APS-C
Max. aperture	f/2.8
Aperture blades	9
Lenses/Groups	17 elements in 13 groups
Min. focus distance	2.50 meters
Reproduction ratio	0.17x
Features
Stabilization	Yes (built in lens)
Focus	Ultrasonic AF Motor (Ring-USM)
Internal Focus	Yes
Built and notes
Tripod ring	Yes
Extenders	Yes
Filters	52 mm
Lens hood	Yes, supplied
Weather sealing	Yes
Weight	2890 g
Dimensions	168 x 367 mm
Buy
Canon RF 400mm f/2.8 L IS USM, buy on Ebay JuzaPhoto contains affiliate links from Amazon and Ebay and JuzaPhoto earn a commission in case of purchase through affiliate links.

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Reviews

What do you think about this lens?

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The following opinions have been automatically translated with Google Translate.

Mattia Campos

sent on June 24, 2025

Pros: Image quality and pleasantness Extraordinarily light and can also be used handheld.

Cons: Witnessing the vision of the terminal part (attachment) of the lens and touching that "welded" adapter, made of gray metal, even in relief with respect to the surface of the barrel, is a terrifying and gruesome experience worthy of the best horror film .... To play it down I could quote Henry Fonda in the film "My name is Nobody": "you glitter like the door of a brothel"; ) Consequently among the cons I obviously put the price, well above that of the GM 400 and now equal if not even higher in some situations than the undisputed Sovereign of all 400 2.8, that is the Nikon Z

Opinion:

Marco50

sent on June 03, 2023

Pros: Weight speed maneuverability

Cons: As always for these lenses the high price

Opinion: I have been using this lens for a few months, I had many doubts to replace my EF 500 f4 ISII that for many years has given me a lot of satisfaction. I spent an interlude of time using a canon EF 400 f4 DO II with which the spark did not go off. My only doubt for this lens were the missing 100 mm that these days always serve, but if I compare the weight and handling I am convinced immediately, I reduced the weight to a minimum using leofoto bracket (recovered from the previous lens) and folding lens coat hood by doing so you can afford to do wandering hunting even at my age. Autofocus speed certainly the fastest I've ever had, with 1.4 you don't notice any difference and with the 2x it's very fast. Quality: remarkable optical yield at 2.8 if I think that I can have an 800 mm f 5.6 using the 2x also considering the fact that the quality suffers, but I do not see all the difference that I have found in other optics. I will continue to use it in various conditions to see more strengths and weaknesses. I continue to trust mom Canon, but considering that parts of the body have already taken my kidneys I need. Surely the positive thing that the used is easily given away and this makes the difference because it sweetens the pill.

Photos taken with Canon RF 400mm f/2.8 L IS USM

Panthera leo

by Stefano Bonfoco
80 comments, 3722 views [editors pick]

HI RES 41.8 MP

The beginning of the adventure

by Bavassano Michele
55 comments, 5555 views

Rusty Hunchback

by Cirillo Giovanni
132 comments, 9560 views [editors pick]

HI RES 14.5 MP

Enchanted gorges

by Bavassano Michele
54 comments, 4458 views

HI RES 32.7 MP

Goshawk

by Marco50
78 comments, 3422 views

HI RES 15.4 MP

Howl on the attack

by Nangi
91 comments, 3607 views

HI RES 6.3 MP

Last rays of light

by Bavassano Michele
23 comments, 4454 views

HI RES 40.7 MP

HOOPOE IN THE MIRROR

by Marco50
79 comments, 1921 views

HI RES 15.4 MP

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Green Season

by Bavassano Michele
28 comments, 9057 views

HI RES 14.8 MP

Small lynxes

by Marco50
72 comments, 2589 views

HI RES 15.4 MP

Wild Cat

by Bavassano Michele
30 comments, 3519 views

HI RES 25.2 MP

Low-level flight

by Nangi
73 comments, 2348 views

HI RES 6.8 MP

PARDINA LYNX

by Marco50
66 comments, 2754 views

HI RES 8.6 MP

Lynx Baby

by Marco50
60 comments, 1952 views

HI RES 8.6 MP

The lion King

by Bavassano Michele
24 comments, 3645 views

Games

by Marco50
51 comments, 1784 views

HI RES 8.6 MP

Clash of black grouses in the storm

by Nangi
68 comments, 3079 views

HI RES 6.8 MP

Sparrowhawk ?

by Marco50
62 comments, 2123 views

HI RES 24.0 MP

Iberian Lynx

by Marco50
60 comments, 1857 views

HI RES 15.4 MP

Goshawk at dawn

by Marco50
72 comments, 1872 views

HI RES 15.4 MP

Sparrowhawk ?

by Marco50
67 comments, 1801 views

HI RES 15.4 MP

Ural Owl

by Marco50
62 comments, 1955 views

HI RES 3.8 MP

King volture

by Bavassano Michele
23 comments, 3431 views

HI RES 12.8 MP

Turtledove in the mirror

by Marco50
62 comments, 1612 views

HI RES 8.6 MP

Kingfisher

by Marco50
64 comments, 2453 views

HI RES 8.6 MP

Goshawk

by Marco50
67 comments, 2094 views

HI RES 15.4 MP

Lince Pardina

by Bavassano Michele
23 comments, 3158 views

Morning Light

by Bavassano Michele
25 comments, 2030 views

Unexpected Griffin

by Marco50
63 comments, 1332 views

HI RES 6.0 MP

Beauty in the bathroom

by Marco50
72 comments, 1928 views

HI RES 6.0 MP

Welcome back Green Woodpecker

by Marco50
60 comments, 1393 views

HI RES 8.6 MP

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Jay

by Marco50
56 comments, 1966 views

HI RES 15.4 MP

Goshawk at dawn

by Marco50
57 comments, 1983 views

HI RES 15.4 MP

The black fork in the storm

by Nangi
37 comments, 1961 views

HI RES 6.8 MP

Golden eagle

by Marco50
60 comments, 2081 views

HI RES 3.8 MP

Sparrowhawk ?

by Marco50
49 comments, 1802 views

HI RES 17.3 MP

Yaffle ?

by Marco50
44 comments, 982 views

HI RES 8.6 MP

The sample photos are selected automatically between all photos posted by JuzaPhoto members, using the camera and the lens selected in the techs. If you find evident errors (e.g. photos taken with cameras and lenses that are not available yet), you can contribute to improve the page by sending a private message to the user that has entered incorrect values in the photo caption.

Reviews » Lenses » Lenses Canon » Canon RF 400mm f/2.8 L IS USM

Canon RF 400mm f/2.8 L IS USM : Specifications and Opinions

Buy

Offerte Usato RCE

Reviews

What do you think about this lens?

Photos taken with Canon RF 400mm f/2.8 L IS USM