Canon RF 10-20mm f/4 'L' IS STM (full-frame!) lens review

My pleasure to finally get a chance to handle this crazy / beautiful lens.

All sample pictures taken by me on a Canon EOS R5 and R7 camera.

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Licensed under Creative Commons: By Attribution 3.0

[christopherfrost]

By the way everyone, there's another oft-requested new Canon lens sitting in my office right now, awaiting testing :-)

[Ckama]

It breaks my heart to know that there are people out there who would dislike a Christopher Frost video

[elverde]

Gotta love those extreme wide angles. Such an amazing lens but definitely deep pockets to be able to enjoy that lens 🥲🥲

[gilleswalther]

RF 10-20m F4 + RF 24-105mm F4 👀 winning combo

[RFGfotografie]

Whenever I will get a R6 Mark II, I will totally buy this lens. No questions asked. Together with the 24-105 2.8 and the 100-500. And I am set for life :) But that will take some time...

[RFGfotografie]

Love all your video's :) You're my to go guy for reviews.

[janas]

Great review 👍
Just imagine shooting the milkeyway with this lens😮

[micahaka]

Would love a review(s) of the Voigtlander 10/12/15mm !!

[_schwarzbunt]

First lens in almost a decade that gets me somewhat exited - and it does so: for its versatility and capability.

Would appreciate to see an equivalent lens in zoom range and image quality for Sony FF & and would favour an even smaler size to electronic features, such as autofocus.

Thanks for the information dense and rich review, Mr. Frost.

[swistedfilms]

Thanks for testing it on the R7 as well! It seems like all the RF glass is up to the challenge of that sensor. I've adapted the EF 70-200 f/2.8 L Mark III to it and it doesn't always rise to the challenge!

[berlayar-ffpu]

Can't wait till he reviews rf24-105 2.8

[remotAge]

Cool, but far too pricey I'll keep my 16mm 2.8

[Anymouse]

It would be interesting if you added a section to your tests that would show how well the in-camera geometry corrections fix the image. Some (especially third party) lenses tend to display strong distortions when corrected. I would be especially interested in how well the corrections handle center warping at different focus distances.

[OneWeekGetAway]

Yes, as a Sony user this may be the only Canon RF lens I am really jealous of (perhaps also the 35 w/half macro and the 28 pancake)

[EricRoseBahamas]

Do you think it is sharper than the Sigma 8-16mm? A number of us are still interested in that Sigma, and its 8mm, after your wonderful review a few years back 😊

[Vaquero_interestelar]

Good video, but it would be better if the diagram didn't go from f4 to f11 immediately. Many of us would like to know how sharp this lens is at f5.6 and f8

[panmaew]

Calling the uncorrected image at 10mm as heavily vignetting is an understatement here. No surprise there is noticeable noise correction as well as digital edge sharpening in the final image. The first I have seen in a camera lens, at least to such an obvious degree.

[derekv]

Will still keep adapting my EF 11-24 F/4

[budthecyborg]

Recently I bought the Laowa 9mm Zero D for my R7 (14.4mm FF), even though it's only 103 degrees FoV, I can't imagine wanting anything wider.

[mcmoose]

Serious question . Isn't barrel distortion an unavoidable characteristic of an ultra wide lens ? I always considered the creative use of this distortion one of the main reasons for choosing an extremely wide angle.