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Canon R3 vs Canon EOS-1D X Mark III – Head-to-Head Comparability

The EOS R5 was one of many hit cameras of 2020, and now Canon have adopted up on that success by launching a brand new flagship mirrorless digital camera referred to as the EOS R3.

At first look you would be hard-pressed to inform it aside from the identical firm’s range-topping DSLR digital camera, the EOS-1D X Mark III, and certainly the Canon R3 mirrorless and the 1D X III DSLR truly share numerous similarities, so which one must you choose?

We’re bringing you this in-depth Canon R3 vs Canon EOS-1D X Mark III head-to-head comparability that will help you select between these two flagship 35mm full-frame cameras.

Sensor and Processor

The EOS-1D X Mark III has a 20.1 megapixel full-frame CMOS sensor and the very newest DIGIC X picture processor, a mixture that is constructed for velocity.

The R3 ups the ante significantly, although, by being the primary ever EOS digital camera to make use of a Stacked, Again-Aspect Illuminated (BSI) CMOS sensor together with the identical DIGIC X processor.

Canon have not but revealed what number of megapixels the EOS R3 can have, however the brand new stacked sensor doubtlessly guarantees higher low-light efficiency at like-for-like ISO speeds and quicker efficiency than the traditional CMOS sensor utilized by the EOS-1D X.

ISO Velocity

The native sensitivity vary of the Canon EOS-1D X Mark III runs from 100-102,400, which will be expanded to ISO 50-819,200.

The ISO vary of the Canon R3 has not been revealed but.


The 1DX Mark III is able to internally recording DCI 4K video at 60 fps with 10-bit 4:2:2 coloration and Uncooked 5.5K video, plus there’s additionally Full HD recording as much as 120fps.

We might count on the Canon R3 to at the least match the cheaper R5 by providing the identical 8K inner video recording as much as 30p (non-cropped) in 4:2:2 10-bit Canon Log (H.265) or 4:2:2 10-bit HDR PQ (H.265), along with 4K video at as much as 120p, which is markedly higher than on the 1D X.


The Twin Pixel CMOS AF system that is used on the 1D X III when taking pictures video or in Dwell View options 3,869 autofocus factors with 525 computerized positions.

The brand new Canon R3 will use a “subsequent technology” model of Twin Pixel CMOS AF which is able to provide higher monitoring and focusing than another EOS digital camera to this point, which presumably consists of the 1D X, no imply feat provided that digital camera’s superlative focusing system.

Canon have said that “it can add a brand new topic (but to be disclosed) to the digital camera’s AF monitoring.” which can be a devoted Chook-eye AF mode.

It is also resurrecting the progressive eye-control AF operate from the 1990’s period EOS 3, 5 and 50 movie SLRs.This can mean you can choose the AF level just by it by means of the viewfinder!

Burst Taking pictures

The Canon EOS-1D X Mark III can seize photographs at as much as 20fps in reside view or 16fps with the viewfinder and the buffer permits Uncooked and JPEG bursts of as much as 1000 frames.

If you’d like even quicker burst taking pictures, the Canon R3 takes issues to a complete different stage by with the ability to shoot at 30fps with the digital shutter with full AF/AE monitoring and minimal picture distortion.

Climate Resistance

The Canon R3 will function the identical skilled stage of sturdiness and dirt and moisture resistant weather-proofing because the EOS-1D X Mark III DSLR.

Built-in Grip

The Canon R3 shares the identical built-in grip design with duplicated vertical controls that EOS-1D sequence customers have loved for a few years.

While professional shooters will largely be delighted, lovers could discover the additional bulk and the shortage of flexibility extra off-putting.


The Canon EOS-1D X Mark III would not function an in-body stabilisation system, as an alternative counting on the lens to provide it if obtainable.

The precise particulars of the brand new Canon R3’s IBIS system have not been revealed but, however we would count on it to at the least match the EOS R5, which options 5-axis in-body picture stabilisation that gives as much as 8-stops of IS when utilizing the digital camera with sure suitable lenses.

LCD Display screen

The Canon EOS-1D X III has a a 3.2-inch 2.1m-dot LCD touchscreen which can also be utilized by the EOS R5.

We might count on the display on the Canon R3 to be of higher-resolution than each these cameras, however it most likely will not flip out to the facet and even tilt, similar to the fastened display on the EOS-1D X III.

Reminiscence Playing cards

The Canon EOS-1D X Mark III has twin reminiscence card slots, each of which assist ultrafast CFexpress playing cards.

We anticipate that the R3 will observe the lead of the 1D X and have two reminiscence card slots that each assist CFexpress reminiscence playing cards, fairly than the combined media method of the R5.

Battery Life

Which battery sort will the brand new R3 use – the LP-E6NH battery from the EOS R5 or the LP-E19 battery from the EOS-1D X III?

It is onerous to resolve from the product photographs of the R3 that Canon have launched thus far.


The EOS-1D X Mark III retails for £6,4999 / $6,499 within the UK / US, a price-tag that can also be shared by the Sony Alpha 1.

With its principal mirrorless rival and related flagship DSLR sibling each costing £$6.5K, we would count on to see the brand new EOS R3 be part of them on the similar worth level.


The brand new Canon R3 and the each 1D X III each share the same, acquainted visible profile with their built-in vertical grips, so it will be fascinating to learn the way the mirrorless mannequin both matches and even surpasses its DSLR equal. Early indicators are that Canon are taking issues to a different stage with the R3, particularly because of 30fps burst taking pictures with much more refined auto-focusing.

So what do you assume? Would you select the brand new Canon R3 mirrorless or the Canon EOS-1D X Mark III DSLR, and why? Depart a remark beneath!

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