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The best professional camera in 2021: which pro camera system is best?

Best professional camera
(Image credit: James Artaius)

The best professional camera for you will depend on the type of photographic work that you do. This is because different professional cameras will have different features, with sports and news cameras sporting impressive burst modes and commercial landscape, fashion and portrait cameras focusing more on high resolution sensors. 

This means that finding the right camera for you will depend entirely on what you need out of your kit. Meanwhile, if you're a videographer (or you regularly shoot video for your work), then you'll be looking for a whole other set of features, with uncropped capture, codecs and frame rates becoming far more important than autofocus modes and sensor size. If you're primarily a videographer, then you may want to check out our dedicated Best 4K cameras for video guide, or check out the best cameras for vlogging. Serious filmmakers may be best off looking at our guide to best cinema cameras.

However, it's worth noting that, with video becoming a major focus among camera manufacturers, there are some fantastic professional cameras that offer a great selection of both photo and video features at the moment. The Sony A1 features 30fps continuous shooting, a 50.1MP sensor and 8K video. Meanwhile, the upcoming Canon EOS R3 is set to have a 30fps burst mode and the ability to control the autofocus with your eyes (yes, really!).

Plus, the medium format camera market is only becoming more competitive. The release of the compact and relatively affordable Fujifilm GFX 100s definitely turned a few heads, making medium format a little more accessible. While you could never call medium format cameras 'cheap', the Hasselblad 907X 50C joins the GFX 100s in featuring a more affordable price tag. Don't worry though, there are still plenty of eye–wateringly expensive models, including the brilliant Phase One XT.

To help you find the best professional camera for your purposes, we've divided this guide into six different brands. After all, when you purchase a camera, you're also buying into the entire lens ecosystem – so, you want to make sure that the camera has the glass you'll need. 

No matter whether you've got a budget of $1,000 or $10,000, we've gathered the best professional cameras right here. 

Best professional camera in 2021

Canon

Canon offers a large range of professional lenses and produces some of the most highly-regarded pro cameras. The best Canon cameras have traditionally been known its DSLRs, especially in professional circles, but it's shifting its attention wholesale to its new mirrorless EOS R system, and the original EOS R and beginner-orientated EOS RP were just the opening salvo – the EOS R5 is the camera that's caught our attention, and that of every other pro photographer out there, we suspect.

(Image credit: Canon)

1. Canon EOS R5

A camera with specs so spectacular we're still rubbing our eyes

Specifications
Type: Mirrorless
Sensor: Full frame
Megapixels: 45
Lens mount: Canon RF
Monitor: 3.15-inch vari-angle touchscreen, 2,100k dots
Viewfinder: OLED EVF, 5,690k dots, 100% coverage, 0.76x magnification
Max continuous shooting speed: 12fps mechanical shutter, 20fps electronic
Max video resolution: 8K
User level: Professional
Reasons to buy
+Best AF on the market+Best full-frame IBIS+8K video is astounding
Reasons to avoid
-Video recording limitations-Standard 4K is just okay

As a stills camera, the Canon EOS R5 is simply Canon's finest product ever. It’s the perfect amalgamation of the EOS R’s form, the EOS 5D’s function, and the professional-grade autofocus of the EOS-1D X. If you're a stills or hybrid shooter who flits between photography and videography, it's one of the best cameras you will ever have the pleasure of using. It has attracted some attention for the wrong reasons, notably overheating (or the threat of it) when recording 8K video, but this shouldn't detract from this camera's extraordinary capabilities. It's not perfect at everything, but given its resolution, its frame rate and its video capabilities combined, this is genuinely a landmark camera. What's more – and this might sound a little strange – it's taken the arrival of the much more expensive Sony A1 to realize just how good the Canon EOS R5 actually is.

Read more: Canon EOS R5 review

(Image credit: Canon)

2. Canon EOS-1D X Mark III

Canon's latest autofocus system is on an entirely new level

Specifications
Type: DSLR
Sensor: Full frame
Megapixels: 20.1MP
Lens mount: Canon EF
Screen: 3.2in fixed LCD, 2.1 million dots
Viewfinder: Optical
Max burst speed: 16fps viewfinder, 20fps live view
Max video resolution: 4K
User level: Professional
Reasons to buy
+Smart Controller is a revelation+Deep Learning AF+HDR stills and video standards+Uncropped 4K!
Reasons to avoid
-Lower resolution than the Sony A9 II-No animal AF (yet)-No image stabilization-No tilting LCD screen

With the Canon EOS1-D X Mark III, Canon has released a camera packed with leading-edge tech, including deep learning AF, an optical Smart Controller, HEIF and HDR PQ support, CFexpress, 12-bit internal 4K RAW, head tracking and so much more. Canon has combined the advantages of DSLR and mirrorless to produce a hybrid body that can shoot according to what the situation demands. While it lacks some of the luxuries of mirrorless models, this camera does so much that no other system can – it's a genuine glimpse into the future. Offering the best of both worlds, with the sheer speed of an optical DSLR with the advanced accuracy of mirrorless, it’s a true hybrid system that moulds to the needs of individual professionals and individual shooting scenarios. The DSLR is not dead. The tank-like EOS-1D X Mark III has absorbed the technical advances of mirrorless cameras and added a few of its own to product an awesome professional sports and action photography tool.

Read more: Canon EOS-1D X Mark III review

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3. Canon EOS 5D Mark IV

An old-school DSLR that still delivers, even now

Specifications
Type: DSLR
Sensor: Full-frame
Megapixels: 30.4MP
Lens mount: Canon EF
LCD: 3.2in touchscreen, 1.62million dots
Viewfinder: Optical
Maximum continuous shooting speed: 7fps
Max video resolution: 4K
User level: Professional
Reasons to buy
+Responsive touchscreen+Impressive live-view AF
Reasons to avoid
-4K video crop-Middle of the road resolution

On paper, the EOS 5D Mark IV looks a distinct second best to rival cameras with higher resolutions, faster frame rates and better 4K video features – the EOS 5D Mark IV applies a heavy 4K video crop that makes ‘wide’ shots more difficult. Nevertheless, the 5D Mark IV has proved itself a very effective, durable and versatile camera for countless professional photographers, and its Dual Pixel AF technology gives it a peppy autofocus performance in live view and video modes. This camera was launched way back in 2016, though, and with no replacement announced or even rumored, it's getting harder to recommend this solid but ageing workhorse.

Read more: Canon EOS 5D Mark IV review

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4. Canon EOS R6

One of the best all-rounder cameras around, with class-leading AF

Specifications
Type: Mirrorless
Sensor: Full frame CMOS
Megapixels: 20.1MP
Monitor: 3-inch fully articulating touchscreen, 1,620k dots
Continuous shooting speed: 12fps mechanical shutter, 20fps electronic shutter
Viewfinder: 0.5-inch OLED EVF, 3,690k dots, 100% coverage
Max video resolution: 4K UHD
User level: Enthusiast/professional
Reasons to buy
+Mind-blowing autofocus+Superb stabilisation
Reasons to avoid
-Is 20MP enough?-4K recording limits

The EOS R6 is the serious enthusiast's model of the EOS R series, taking the place of the slightly muddled EOS R, and for those who don't need the leading-edge tech and resolution of the EOS R5 (more on which below). Its combination of speed, video and low light capabilities give it professional appeal too. What you get on the EOS R6 is a top shooting speed of 20fps, and autofocus that borrows the deep-learning tech from the EOS-1D X Mark III, meaning it gets better as you use it. The resolution is just 20.1MP, but this means the pixels are larger, for better low-light performance. Indeed, the R6 edges out the R5 in this department, with a standard ISO range of 100-102,400 that's expandable to 50-204,800. When you combine this with the introduction of Canon's 5-axis in-body image stabilisation system that provides up to eight stops of effective compensation, this is a seriously capable low-light camera. You have to decide, though, if you want speed, cost and low light capability more than outright resolution.

Read more: Canon EOS R6 review

Sony

Sony launched its full frame mirrorless camera system from scratch, and although you can use older Alpha lenses designed for its SLR cameras on the new A7 and A9 bodies, in practice you’re much better off investing in native FE mount lenses. There are now 31 native FE lenses with more to come, so although swapping to Sony might be expensive initially, these cameras have a lot more native lens support than other mirrorless camera brands. 

See also: Best Sony cameras

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5. Sony A1

Sony’s sports specialist really takes the fight to pro DSLRs

Specifications
Type: Mirrorless
Sensor: Full Frame
Megapixels: 50.1MP
Lens: Sony E mount
LCD: 3in tilting touchscreen, 1.44million dots
Viewfinder: EVF, 9.44million dots
Maximum continuous shooting speed: 50fps electronic shutter, 10fps mechanical
Max video resolution: 8K
User level: Professional
Reasons to buy
+Unprecedented 30fps burst shooting+8K video that doesn't overheat+Hybrid CFexpress A and SD card slots
Reasons to avoid
-Stabilization is still suspect-30fps isn't guaranteed-No articulating screen

This could be the ultimate mirrorless camera. There is literally nothing it can't shoot. Sports? Check, thanks to its unreal 30fps continuous shooting. Fine detail? Check, thanks to its 50.1MP resolution. Video? Check, thanks to its 8K recording capability (even though it's hampered by not having a fully articulating screen). The Sony A1 is far and away the most advanced and most powerful camera on the market… yet this comes at a cost, literally. It's about twice the cost of the Sony A9 II, and it's even more expensive than the 100MP medium format Fujifilm GFX 100S. There are also caveats on the 30fps burst, which isn't always achievable (sometimes topping out at 15-20fps, which is still impressive but less impressive than the spec sheet). Overall, though, if you want a camera that can take on any possible assignment, this is it.

(Image credit: Sony)

6. Sony A9 Mark II

Sony’s sports specialist really takes the fight to pro DSLRs

Specifications
Type: Mirrorless
Sensor: Full Frame
Megapixels: 24.2MP
Lens: Sony E mount
LCD: 3in tilting touchscreen, 1.44million dots
Viewfinder: EVF
Maximum continuous shooting speed: 20fps electronic shutter, 10fps mechanical
Max video resolution: 4K
User level: Professional
Reasons to buy
+Blistering burst shooting+Incredible autofocus+Unrivaled connectivity
Reasons to avoid
-Menus remain obtuse-Isn't it time for CFexpress?

To quote from our own review, the Sony A9 II is the fastest, most ferocious full-frame sports camera we've ever used – but this was before we tested the EOS-1D X Mark III. Nevertheless, the Sony A9 Mark II's blistering speed and autofocus performance are impressive, and matched only by its phenomenal connectivity, which promises to be a game changer for pro shooters. We would love to have seen Sony implement something akin to Olympus' Pro Capture feature, so that you never miss the critical moment. However, if our most damning criticism is that the A9 II is too fast for us to keep up with, surely that's nothing but mission accomplished for Sony! 

Read more: Sony A9 Mark II review

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7. Sony A7R IV

A stunning blend of resolution, speed, 4K video and value

Specifications
Type: Mirrorless
Sensor: Full-frame
Megapixels: 61MP
Lens mount: Sony
LCD: 3in tilting touchscreen, 1.44 million dots
Viewfinder: EVF, 5.76m dots
Maximum continuous shooting speed: 10fps
Max video resolution: 4K
User level: Professional
Reasons to buy
+Compact for full frame+Highest full frame resolution yet+Still capable of 10fps
Reasons to avoid
-Poor balance with larger lenses

The A7R IV is Sony’s new highest-resolution full frame mirrorless camera, with a record-breaking 61 million pixels and yet still capable of shooting continuously at 10fps. It also has Sony's usual very good 4K video capabilities, though still capped at 30p. The latest iteration of Sony's eye AF, however, is stunningly effective at tracking portrait subjects, even in continuous AF. While the Sony A9 is designed for out-and-out speed and responsiveness,  the A7R Mark IV is much more suitable for all-round photography at the highest quality levels. It continues the 'R' line by offering the highest resolution of any full frame camera, but while its 10fps burst shooting looks good on paper for sports photography, it doesn't have the buffer capacity and responsiveness of the A9, so its high frame rate is useful to have, but the A7R Mark IV would not be your first choice for sports. HOWEVER, for outright resolution, the A7R Mark IV reigns supreme, and not just in the Sony camp but amongst full frame cameras in general. You have to switch up to medium format to beat this, with all the costs and limitations that go with it. Not even the new Sony A1, at twice the price, can match this resolution.

Read more: Sony A7R IV review

Nikon

Like Canon, Nikon also offers a huge range of professional lenses, and a choice of pro camera bodies. Nikon has also taken its first steps in the full frame mirrorless market with the Nikon Z 6 and Z 7 and, as with the Canon EOS R, these cameras can use existing current Nikon DSLR lenses, without restriction, via an adaptor, so Nikon users can try a ‘sidegrade’ to mirrorless a step at a time rather than having to swap out a whole system. 

See also: Best Nikon cameras

(Image credit: Nikon)

8. Nikon D6

Nikon’s answer to the EOS-1D X Mark III is more conventional

Specifications
Type: DSLR
Sensor: Full-frame
Megapixels: 20.8MP
Autofocus: 105-point AF, all cross-type
Screen type: 3.2-inch, 2,360,000 dots
Maximum continuous shooting speed: 14fps
Movies: 4K
User level: Professional
Reasons to buy
+Sturdy build+Pro connectivity and workflow+14fps shooting and 4K video
Reasons to avoid
-Its speed doesn’t come cheap-AF system yet to be tested fully

Canon made some big technological leaps with the EOS-1D X Mark III, but the Nikon D6 is more conventional. Nikon will no doubt have wanted to make sure that owners of the D5 will be able to make a seamless switch to the new camera, which has a band new 105-point AF system, 14fps continuous shooting and a 10.5fps silent mode. Nikon has also concentrated on professional workflow and connectivity options, not just headline-grabbing technologies. If you're buying your firs pro sports DSLR, the Canon has the edge, but if you're a long-time Nikon user with a bag full of lenses, the D6 is the obvious candidate for your next upgrade.

Read more: Nikon D6 hands on review

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9. Nikon D850

The ultimate DSLR? The D850 has power, resolution and speed

Specifications
Type: DSLR
Sensor: Full-frame
Megapixels: 45.7MP
Lens mount: Nikon F
LCD: 3.2in tilting touchscreen, 2.3million dots
Viewfinder: Optical
Maximum continuous shooting speed: 7fps
Max video resolution: 4K
User level: Professional
Reasons to buy
+Large, bright viewfinder+Sophisticated, proven AF system+Superb resolution
Reasons to avoid
-Slow live view focusing

Where the Nikon D6 is built for sheer speed, durability and responsiveness, the D850 is built for resolution – though it can still capture images at 7fps, or 9fps with the optional battery grip. Some may say the D850 is the high-point of DSLR resolution and perhaps that last great DSLR release, but it does not feel like a dinosaur. Its big, chunky body feels good in the hand and great with bigger lenses, and while its live view AF may be sluggish, it’s a very powerful, modern-feeling camera – a superb all-rounder that actually feels as tough, rugged, fresh and exciting now as when it was launched back in 2017. 

Read more: Nikon D850 review

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10. Nikon Z7 II

Resolution, 10fps shooting and 4K video but facing big competition

Specifications
Type: Mirrorless
Sensor: Full frame CMOS
Megapixels: 45.7MP
Monitor: 3.2-inch tilting touchscreen, 2,100K dots
Continuous shooting speed: 10fps
Viewfinder: EVF, 3,690k dots, 100% coverage
Max video resolution: Uncropped 4K UHD up to 30p, cropped 4K UHD up to 60p
User level: Enthusiast/Professional
Reasons to buy
+Excellent image quality+Lovely handling+5-axis IS system+Best-in-class build quality
Reasons to avoid
-EVF resolution lower than rivals-Tilt-angle display, not vari-angle

The Z7 II is Nikon's flagship full frame mirrorless camera and an updated version of the original Z7. All the changes that we’ve seen on the Z7 II compared to the original Z7 are certainly welcome, but we can’t help feeling that Nikon’s played it a bit safe. We’d like to have seen even more of a jump to really make it a serious threat to the likes of the Canon EOS R5 and Alpha A7R IV. But still, the Nikon Z7 II has a lot going for it. It might not have a standout feature that sets it apart from its competitors, but the Nikon Z7 II delivers solidly across the board and is a great mirrorless camera. Nikon's changes – dual processors and dual memory card slots, for example – have made a great camera even better.

Read more: Nikon Z7 II review

Fujifilm

Fujifilm has moved into the professional arena very successfully with two separate camera ranges. The APS-C X-series flagship is the X-T4, which is pretty cheap in this company but offers exceptional performance for the money and video features that challenge or beat those in much more expensive pro cameras. And then two sensor sizes larger, there's Fujifilm's GFX range, which has redefined what medium format cameras can do – and who afford them. The red-hot news here is that Fujifilm has just shoehorned the tech from the GFX 100 into the GFX 100s, a camera no larger than a pro DSLR and – amazingly – cheaper than the new Sony A1. The GFX 100s looks stunning and we will publish a full review just as soon as we can get a sample.

Fujifilm GFX 100s vs GFX 100

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11. Fujifilm X-T4

The most powerful APS-C mirrorless camera you can get

Specifications
Type: Mirrorless
Sensor: APS-C
Megapixels: 26.1MP
Lens mount: Fujifilm X
Screen: 3in articulating touchscreen, 1,620k dots
Viewfinder: EVF, 3.69 million dots
Max continuous shooting speed: 30/15fps
Max video resolution: 4K
User level: Expert/professional
Reasons to buy
+6.5-stop in-body stabilisation+4K video at up to 60/50p+High-speed shooting
Reasons to avoid
-New and expensive

Is the Fujifilm X-T4 a pro camera? We think so, for its combination of speed, AF system and video capabilities. The X-T3, first announced in 2018, was already a seriously impressive camera, lacking only a few key features – in-body image stabilisation and a vari-angle touchscreen. The X-T4 simply adds those in, building on what came before to become one of the best mirrorless cameras around. It still has the sophisticated 26.1MP X-Trans sensor, the super-fast autofocus and the capacity to shoot 4K video. Fujifilm have even improved the shutter over the X-T3, producing a model that lasts longer and can achieve higher sustained burst speeds, and also swapped out the battery for a newer model that lasts much longer. 

Read more: Fujifilm X-T4 review

12. Fujifilm GFX 100S

It's expensive, but not for medium format. It's also quite exceptional

Specifications
Sensor: Medium format
Megapixels: 102MP
Lens mount: Fujifilm G
LCD: 3.2-inch touchscreen, 2.36 million dots
Viewfinder: EVF, 5.76 million dots
Max continuous shooting speed: 5fps
Max video resolution: 4K at 30fps
User level: Professional
Reasons to buy
+Incredible resolving power+Full frame 4K video
Reasons to avoid
-Controls may divide opinion-In-body stabilisation isn't foolproof

Want the ultimate resolution in a body so small and steady that you can use it for street photography? Meet the Fujifilm GFX 100S, a marvel of photographic achievement that packs a 100MP medium format sensor into a body about the size of a bulky DSLR that even possesses in-body image stabilization – which, despite having to stabilize a gigantic medium format sensor, is actually on par with the IBIS systems on Sony's smaller full-frame sensors. While it lacks the vertical grip of the $10,000 Fujifilm GFX 100, it's otherwise the same tech and same capabilities squeezed into a much smaller and much cheaper body – though Fujifilm's medium format lenses mean that this is till far from a compact system. The image quality is simply spectacular; for ultimate stills shooting, this is almost unbeatable. It even shoots incredibly respectable 4K 30p video, too!

Read more: Fujifilm GFX 100S review
Read more:
Fujifilm GFX 100 review

Panasonic

Panasonic’s range is now split between its existing Micro Four Thirds cameras with smaller sensors but legendary 4K video capabilities, and its new full frame mirrorless Lumix S models – and with no upgrade path at all between these systems. There are an increasing number of native Lumix S lenses right now, thanks to the L-Mount Alliance and the work of other lens makers like Sigma and Leica. The Lumix S system is developing fast but will require heavy investment in an all-new system.

See also: Best Panasonic cameras

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13. Panasonic Lumix S1R

The Lumix S1R is a big, hefty, impressive camera but not a game-changer

Specifications
Type: Mirrorless
Sensor: Full frame
Megapixels: 47.3MP
Lens mount: L-Mount
LCD: 3.2in tri-axial touchscreen, 2.1million dots
Viewfinder: EVF
Maximum continuous shooting speed: 9fps
Max video resolution: 4K
User level: Professional
Reasons to buy
+47.3MP resolution+Superb EVF
Reasons to avoid
-Waiting for new lenses-Only 6fps with continuous AF

The new Lumix S range is a very interesting proposition for professional photographers, especially now that the range of L-mount lenses available is now quite good, and growing fast. The Lumix S1R is the most enticing proposition for pros, combining 4K video capture with a high-speed 6K photo mode and huge 47.3MP resolution. The 5.76-million dot electronic viewfinder is amazing, and the S1R handles very well too. The 24MP Lumix S1 is cheaper and a little better at video, but that's a cost decision – if you're really serious about video, the pricier Lumix S1H is the one to go for. 

Read more: Panasonic Lumix S1R review

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14. Panasonic Lumix GH5

A great choice for video-first shooters, and certainly the cheapest

Specifications
Type: Mirrorless
Sensor: Micro Four Thirds
Megapixels: 20.3MP
Lens mount: Micro Four Thirds mount
LCD: 3.2in touchscreen, 1.62million dots
Viewfinder: EVF
Maximum continuous shooting speed: 12fps
Max video resolution: 4K
User level: Enthusiast/Professional
Reasons to buy
+Excellent video specs+Superb viewfinder+Works wells as a stills camera too
Reasons to avoid
-Smaller MFT sensor

If 4K video is at the top of your wish-list ahead of high-resolution stills, the weather-sealed, dust-proof and even freeze-proof GH5 is a very strong contender (there’s also the even more video-centric GH5S, but that’s limited to 10MP stills). You get fast continuous shooting and also Panasonic’s 6K Photo mode for extracting 18MP stills from 30fps capture. The GH5 can’t compete with the rest for still images, but for video-first users, it’s a much cheaper alternative to full frame. It's also benefiting from some heavy discounting these days, so it's an opportunity to get into professional level video, without paying the usual prices. It feels like it's been around forever, but if you compare the GH5's video specs with the best of its rivals, it's clearly still right up there with the best.

Olympus

Compared to the spectacular developments from other camera makers, Olympus has had a pretty quiet time of it. It's soldiered on with its relatively modest Micro Four Thirds format in a maelstrom of medium format bombshells and armies of full frame mirrorless cameras. In this environment, a 20MP Micro Four Thirds sensor seems hopelessly outgunned. And yet it isn't. The MFT format's size brings substantial cost and weight advantages that its fans will be only too pleased to tell you about.

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15. Olympus OM-D E‑M1 Mark III

Olympus has used much of the tech from its flagship E-M1X here

Specifications
Type: Mirrorless
Sensor: Micro Four Thirds
Megapixels: 20.4MP
Screen: 3.0-inch 1,037k vari-angle touchscreen
Viewfinder: Electronic 2,360k
Lens: Micro Four Thirds
Continuous shooting speed: 15fps
Max video resolution: 4K/C4K
User level: Professional/Enthusiast
Reasons to buy
+15fps burst, with 60fps option+Impressive image stabilisation
Reasons to avoid
-Complex menu system-Is 20MP enough?

It's unlikely Olympus will ever fully overcome resistance to its smaller Micro Four Thirds sensor format, which is one quarter the size of those in its full frame rivals, but that's a pity because this system has a lot to offer. The Olympus OM-D E-M1 Mark III is actually a very effective all-round professional camera for general photography. When shooting sport, its autofocus and frame rate are a good match for more expensive full frame rivals and its Pro Capture mode (up to 60fps) is just jaw-dropping. When high resolution is essential, its 50MP and 80MP options can square up against many medium format cameras, admittedly with static subjects not moving ones. And when shooting absolutely anything, its 7.5 stops of image stabilization outperform every camera on the market. 

Read more: 

Olympus OM-D E-M1 Mark III review

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16. Olympus OM-D E-M1X

Olympus aims for the pro sports market with its flagship camera

Specifications
Type: Mirrorless
Sensor: Micro Four Thirds
Megapixels: 20.4MP
Screen: 3.0-inch 1,037k vari-angle touchscreen
Viewfinder: Electronic 2,360k
Lens: Micro Four Thirds
Continuous shooting speed: 15fps
Max video resolution: 4K
User level: Professional
Reasons to buy
+Pro build quality+Next-generation AF
Reasons to avoid
-Smaller MFT sensor-Pricey next to E-M1 II

Olympus raised a few eyebrows when it launched the OM-D E-M1X, a big new professional camera aimed squarely at the sports market, but with what looked like very similar specs to the existing E-M1. But dig deeper and you find the E-M1X is a very different beast, with an integrated grip for bigger battery capacity and duplicated horizontal/vertical shooting controls and a dual processing system that dramatically ups the game for autofocus tracking, with a new AI system for recognising and tracking subjects. What many won't realise, too, is that Olympus has an extremely compelling pro lens line-up, especially for telephoto lenses, and while the Olympus MFT sensor is smaller than the full frame sensors used by Canon, Nikon and Sony pro cameras, it will cost a lot less to build a full professional system – and it will be a lot lighter to carry around. If 20MP is enough (it is for EOS-1D X Mark III and Nikon D6 devotees!), then the E-M1X is a very powerful professional proposition indeed. It's undermined slightly by the E-M1 Mark III, which borrows some of its tech, but the E-MX's big, chunky body gives it a serious handling advantage, especially with bigger lenses.

Read more: Olympus OM-D E-M1X review

How to choose a pro system

Picking the best professional camera is not just about picking the one with the best or most enticing specifications. You have to look at the system as a whole, its lenses, its other models, and what is set to be released in its future. Before making a choice, it's worth asking yourself a series of questions: 

1) Are you switching from a different systems? If this is the case, it's well worth looking into whether there's any potential for compatibility between your existing and new system (i.e. using lens mount adapters). ‘Migrating’ an existing system is much simpler and cheaper than starting again with a whole new setup.

2) What lenses will you need? Think about the kind of work you need and the lenses you need for it, and check whether the system you're considering can meet those needs. Lens guides can be useful here, such as our guides to the best Canon lenses or best Nikon lenses.

3) DSLR or mirrorless? While it does sometimes feel like mirrorless is taking over the world, the best DSLR cameras do still have their advantages and some, like the Canon EOS-1D X Mark III, are breaking new ground. Read our guide to DSLR vs mirrorless cameras if you're still not sure.

4) Video vs stills? Are you shooting video as well as stills? While both DSLRs and mirrorless cameras can and do produce excellent video, mirrorless currently has the edge here, so if video is part of your portfolio then it's worth factoring this into consideration.

More buying guides:

Best Fujifilm cameras
Best mirrorless camera
Best medium format camera
Cheapest full frame cameras
Best cameras for vlogging
The best 4K camera for filmmaking

Rod Lawton

Rod is the Group Reviews editor for Digital Camera World and across Future's entire photography portfolio, with decades of experience with cameras of all kinds. Previously he has been technique editor on N-Photo, Head of Testing for the photography division and Camera Channel editor on TechRadar. He has been writing about photography technique, photo editing and digital cameras since they first appeared, and before that began his career writing about film photography. He has used and reviewed practically every interchangeable lens camera launched in the past 20 years, from entry-level DSLRs to medium format cameras, together with lenses, tripods, gimbals, light meters, camera bags and more.