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Canon RF 100-400mm f/5.6-8 IS USM : Specifications and Opinions

The Canon RF 100-400mm f/5.6-8 IS USM is a tele lens for FF and APS-C, manufactured from 2021. The focus is done by Ultrasonic AF Motor (Nano-USM), it has image stabilization. The average price, when it has been added to the JuzaPhoto database, is 712 €;

44 users have given it an average vote of 9.2 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	100-400 mm
Angle of view	24.4 - 6.2°
Format	FF, APS-C
Max. aperture	f/5.6-8
Aperture blades	9
Lenses/Groups	12 elements in 9 groups
Min. focus distance	0.88 meters
Reproduction ratio	0.41x
Features
Zoom type	Ring, external
Stabilization	Yes (built in lens)
Focus	Ultrasonic AF Motor (Nano-USM)
Internal Focus	Yes
Built and notes
Tripod ring	No
Extenders	Yes
Filters	67 mm
Lens hood	Yes (not supplied)
Weather sealing	No
Weight	635 g
Dimensions	79 x 164 mm
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Reviews

What do you think about this lens?

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Vegmik

sent on February 26, 2022

Pros: Small, light as a feather, surprisingly sharp, a perfect lens (not only) for hiking

Cons: Reduced brightness, lack of hood and weather sealing

Opinion: Among ef lenses I have always looked for the alternative that is light with a relatively large zoom range, and of course able to capture sharp, clear pictures. For me this solution was the Canon EF 70-300mm f/4-5.6L IS USM (I also had 100-400 L and Tam 150-600, but this was my ideal partner for hiking). I bought rf 100-400 as soon as arrived to the market and I have to say that I didn't regret it. Nowadays this is my nr1 lens on short trips and it does the job perfectly. Of course its a bit darker than expected, but even with my EOS R it is not a problem even in low light conditions. Images are sharp, colours are beautiful "Canon-icals" :) before and after sunset, in cloudy weather as well. And it is works perfect in daylight. Yep, lack of tropicalization, so you wont use it in heavy rain or snowstorm, but some raindrops are absolutely ok. It is a perfect exchange of cheaper Canon EF 70-300mm f/4-5.6 IS II nano USM but in quality its step by step with the 70-300mm f/4-5.6L big brother. EF 100-400 and RF 100-500 are playing in az upper league, but you should decide if the plusplusplus amount of money worth it for you or not. For a normal everyday usage for a non-millionaire Ill definitely stick wit this clever, tiny friend :)

The following opinions have been automatically translated with Google Translate.

Magnum58

sent on April 14, 2025

Pros: Lightness and compactness compared to the long focal length, possibility of use as semi-macro, unexpected sharpness on a lens of this cost and level.

Cons: If you know before buying its low light I would say none.

Opinion: I switched to this lens from the RF 200-800, given that photographic hunting is not among my priorities, especially for the excessive weight and bulk of the L series super zoom, which certainly do not make it a bag lens to always carry with you with the rest of the kit as this 100-400 allows you to do. The comparisons made with the various 100-400 L series make me smile, since it would be like comparing a medium-sized Dacia with a Mercedes or BMW of the same displacement... Is it necessary to specify that one of the latter is far superior to the Dacia?, or is it nice to fill your mouth by necessarily praising an L series snubbing everything that the market offers as an alternative to its absurd costs, weights and dimensions? Surely the choice of these lenses, in my opinion, in most cases is not dictated by the lack of economic availability (or at least it is not in my case) but by their versatility of use and transport combined with an enviable sharpness achieved even on basic lenses, perhaps helped by everything that post production offers today, with which you can very well make up for both low light and a contrast or definition that is not excellent given the containment of production costs of these non-pro lenses, which in any case offer the priceless advantage of being able to carry them with you without the fear of carrying an overweight that could ruin a pleasant photographic excursion. Obviously it is not a lens recommended for those who as a genre of photography practice primarily photographic hunting or sports photography, especially indoors, or night shooting or in any case in low light, but it is assumed that one knows this before making the purchase of such a specific lens ..., so I am surprised to read negative comments on characteristics that one should already know before buying, Especially for the fact that these negative comments, in most cases, are expressed in the evaluation of economic optics, as if the fact of being cheap is always synonymous with poor quality, without ever taking into account the parameter that in my opinion is the first to be taken into consideration, that is the quality/price ratio, even if, I repeat, in my case it is not the price that dictates the choice of a lens.

Manz

sent on April 13, 2025

Pros: Lightness, compactness and sharpness of subjects at short distances. Discreet stabilization. Interesting potential as semi-macro.

Cons: Rather dark, but you know it from the beginning. Only enough sharpness with distant subjects, just beyond a certain distance.

Opinion: Great hiking zoom, perfect for landscaping and more. It combines compactness, lightness and ease of swinging. He does not disdain some shots in birdlife but as soon as you exceed a certain distance from the subject the fine detail is lost. The stabilization is decent but the good old rule of maintaining shutter speeds according to the focal length chosen remains valid. It is particularly comfortable and fun to use, despite the variable aperture. Advised!

Daniele Ruggeri D2

sent on September 15, 2024

Pros: Compact, lightweight, stabilized.

Cons: Slow and inaccurate MAF with low brightness.

Opinion: If you want a compact lens with this focal range there is no alternative, it is the smallest and lightest 100-400 ever. and it costs relatively little. I took it to photograph distant landscapes and on a tripod at low iso for reasoned photos is fine. The performance improves if you close the diaphragm a little .. but you will further lengthen the shutter speed and therefore you need an excellent tripod to avoid blur. I can make the comparison with the EF 200LII which at 200 is obviously a blade, but which multiplied by x2 is not this great in landscape, so at this point I prefer the 400mm zoom. If you have to photograph the full moon set in it, things get complicated because to avoid blur you have to stay in times of 1:100s maximum. and at f8 you will be in a bad position with the high iso, so in this case better the 200LII with x2 than from f5.6. High isos take away more detail than a teleconverter. Bad instead to use in the evening handheld, the low brightness makes the iso rise a lot and not even the excellent stabilization can compensate for the lost aperture stops. It is the right lens for landscape or daytime travel. Not bad for photographing some flowers in the mountains either. For portraits I prefer the 200Lii (of course). If you have other needs you have to spend at least twice as much and carry a backpack with you.

Adelmo73

sent on August 01, 2024

Pros: Compactness, lightness

Cons: Lack of af distance switch, very slow AF at 400mm f/8

Opinion: Tested for 15 days alongside the EF L-series model, What about gold and iron. The only possible comparison is the focal length, for the rest this RF loses on all fronts. It is true that we are talking about an L-series lens vs a consumer RF but personally I would have expected much more. There is no selector for the minimum focusing distance, just as there is no selector to decide the type of AF to be used, but it is still a lens with slow and inaccurate focusing on both R5 and R6mk2. I don't feel like recommending the purchase.

There are 12 more reviews. Show all »

Photos taken with Canon RF 100-400mm f/5.6-8 IS USM

Guild

by Peppe Cancellieri
60 comments, 4923 views

HI RES 19.0 MP

Hope

by Peppe Cancellieri
44 comments, 2118 views

HI RES 8.3 MP

The fox and the snake

by Mariogiu
23 comments, 1667 views

HI RES 8.1 MP

... I seemed to see a roe deer ...

by Franca Abello
36 comments, 2816 views

HI RES 4.2 MP

Toast with the secretary

by Gazebo
60 comments, 1609 views

HI RES 17.4 MP

Waves

by Fabrizios53
51 comments, 1774 views

HI RES 7.0 MP

Kingfisher

by Alb83
24 comments, 3010 views

HI RES 7.0 MP

Paneveggio Pale di San Martino Natural Park

by 75Daniele
129 comments, 2184 views

HI RES 3.2 MP

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Uveggio Castle

by 75Daniele
135 comments, 1169 views

HI RES 3.8 MP

A veil of sadness

by Peppe Cancellieri
29 comments, 2182 views

HI RES 13.7 MP

So far so close

by Coradocon
44 comments, 1442 views

HI RES 20.5 MP

Flower fields in South Africa...

by Giuseppe Coppola
26 comments, 759 views

HI RES 27.8 MP

Norway04 among rosebuds

by Gazebo
70 comments, 1504 views

HI RES 28.5 MP

Look...

by Savastano
29 comments, 542 views

HI RES 12.5 MP

The foreigner

by Peppe Cancellieri
38 comments, 1515 views

HI RES 17.7 MP

In flight oasis

by Marinella Bertoglio
18 comments, 2151 views

HI RES 12.1 MP

Untitled Photo

by Vincenzo Sciumè
23 comments, 290 views

HI RES 6.0 MP

St. Gaudentius and the Rose

by Coradocon
50 comments, 1179 views

HI RES 24.0 MP

Kissed by the sun

by Coradocon
38 comments, 946 views

HI RES 9.6 MP

Put Owls in your cannons!

by Diegoz
12 comments, 844 views

HI RES 3.8 MP

Saltimpalo F.

by Joele
29 comments, 1444 views

HI RES 9.8 MP

Untitled Photo

by Vincenzo Sciumè
12 comments, 651 views

HI RES 6.0 MP

Claudio

by Savastano
37 comments, 254 views

HI RES 15.0 MP

Hide and seek

by Biobear
16 comments, 423 views

HI RES 15.6 MP

Here I am again

by Lugace
11 comments, 2671 views

... What did he see?

by Savastano
40 comments, 573 views

Parco Nord Milan, 2022

by Giallo63
24 comments, 3977 views

HI RES 14.2 MP

Sea Dog

by Coradocon
39 comments, 1086 views

HI RES 14.3 MP

Wave upon wave

by Fabrizios53
35 comments, 1002 views

HI RES 7.8 MP

Bee-eater

by Alb83
8 comments, 1551 views

HI RES 11.3 MP

Reflections

by Edoardo Vaccaro
28 comments, 1096 views

HI RES 20.0 MP

The Robin Friend

by Savastano
27 comments, 508 views

HI RES 6.2 MP

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... And at the top I found a friend!!

by Thom
13 comments, 522 views

From up the top of the ancient tower

by Coradocon
46 comments, 753 views

HI RES 6.7 MP

Untitled Photo

by Vincenzo Sciumè
16 comments, 368 views

HI RES 10.7 MP

Hummingbird butterfly

by Vincenzo Sciumè
19 comments, 460 views

HI RES 6.0 MP

Scarce swallowtail

by Vincenzo Sciumè
10 comments, 456 views

HI RES 6.0 MP

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Reviews » Lenses » Lenses Canon » Canon RF 100-400mm f/5.6-8 IS USM

Canon RF 100-400mm f/5.6-8 IS USM : Specifications and Opinions

Buy

Offerte Usato RCE

Reviews

What do you think about this lens?

Photos taken with Canon RF 100-400mm f/5.6-8 IS USM