DSLR vs mirrorless cameras in 2023: which camera format is best, and why?

DSLR vs mirrorless
The DSLR design (left) has some advantages of its own, even if mirrorless cameras (right) seem the way forward (Image credit: Panasonic/Nikon)

The choice between a DSLR vs mirrorless camera is still an important (and sometimes divisive) buying decision. Here, we'll explain what the differences are, and where each camera type has an advantage.

All the major camera manufacturers are focusing their efforts on mirrorless camera systems, but DSLR cameras are still being made, sold, bought and loved!

The best DSLR (opens in new tab)s and mirrorless camera (opens in new tab)s differ in their construction and design, but not in their sensors, image quality, technologies, and indeed many of their features. The differences are partly physical – the way these two camera designs look, handle and work – and partly technical in terms of the video capture and autofocus systems they offer.

Obviously, personal preference comes into play too. The mirrorless vs DSLR debate should largely come down to which one you like using more! These are the best-value Nikon and Canon DSLR cameras (opens in new tab).

Mirrorless vs DSLR in 2023: which is best?

DSLR and mirrorless cameras offer a different shooting experience, and although mirrorless cameras can boast the latest imaging technology, DSLRs have many more traditional physical qualities, including optical viewfinders and old-fashioned virtues like long battery life.

Let's look at the key differences between mirrorless vs DSLR cameras.

1. The mirror

DSLRs and mirrorless cameras both show the scene through the camera lens itself as you compose the picture, but the way they display it is completely different. DSLRs use a mirror to reflect an optical image up into the viewfinder. 

You are looking at an optical image. When you take a picture, the mirror flips up so that the image can then pass to the back of the camera where the sensor is exposed to the image.

DSLRs use a mirror in the body to reflect the image up into the viewfinder. The instant you take a picture, the mirror flips up and out of the way.
(opens in new tab)

Mirrorless cameras take a different approach. They use the ‘live view’ captured by the camera sensor itself to create an electronic image that can be displayed either on the rear screen or in an electronic viewfinder. There is no mirror mechanism to flip up and out of the way.

But what sounds like a win-win situation is a little more complicated than that. First, many people prefer the optical image of a DSLR viewfinder. Second, digital displays consume a lot more power, and mirrorless cameras still can’t compete with DSLRs for battery life.

2. Autofocus

The key difference here is that mirrorless cameras use a single autofocus system for both rear screen and viewfinder shooting, whereas DSLRs – confusingly – have to use two.

DSLRs use dedicated 'phase detect' autofocus sensors which are in the base of the camera behind the mirror. When you take a picture, the mirror flips up and out of the way and that means the AF sensor is no longer available.

Back when DSLRs didn't have live view, this wasn't a problem. But when the demand grew for live view shooting using the rear screen, DSLRs had to switch to autofocus systems that used the image formed on the sensor itself.

So you have a situation that persists to this day – DSLRs have one autofocus system for the viewfinder and a different one for live view shooting.

In terms of performance, mirrorless cameras have largely caught up with DSLRs for autofocus speed and surpass them for frame coverage and tracking features.

DSLRs use separate dedicated phase detection autofocus sensors mounted behind and below the mirror for viewfinder shooting. In the early days, this easily beat mirrorless cameras for speed. The situation has changed, however.
(opens in new tab)

Mirrorless cameras can now be successfully used for fast-moving sports and action photography that once demanded a DSLR. 

In fact, if you look at the capabilities of the hybrid on-sensor autofocus system in the latest Sony A7 IV (opens in new tab), even DSLR diehards would have to concede that the separate phase-detect AF systems in DSLRs are dinosaurs by comparison.

3. Viewfinders

The design of mirrorless cameras means they need to use electronic viewfinders. These have improved hugely in a very short space of time. 

High-quality electronic viewfinders are now found on many mirrorless cameras – and what you see in the viewfinder is exactly what you would see in live view on the rear screen. (Image credit: Nikon)
(opens in new tab)

The latest and best electronic viewfinders available today have such high resolution that you can hardly see the ‘dots’ and they have a clarity that genuinely approaches optical viewfinders. 

However, they can still suffer from lag, or 'latency' – a tiny delay between what the camera sees and what the screen shows. Viewfinder lag is less of an issue than it used to be thanks to faster refresh rates, and the most recent area of focus for manufacturers has been in the blackout effect you would typically see when shooting continuous bursts of images.

Electronic viewfinders can show a more clearly visible view of a scene in low light and have zoom functions for precise manual focusing – two highly underrated benefits of electronic viewfinders. Because of their auto-gain light amplification effect, electronic viewfinders let you compose and shoot images in near darkness.

It's also worth pointing out that if you are a fan of vintage manual lenses which need to be used in stopped-down mode, a DSLR viewfinder will be way too dark but a mirrorless EVF will be fine.

However, many photographers still prefer the ‘naked eye' view of an optical viewfinder over a digital one. You'll soon see the image the camera has recorded in playback mode anyway.

DSLR optical viewfinders are still popular because they offer a 'naked eye' view of world with no screen lag or digital artefacts.
(opens in new tab)

Optical viewfinders have another key advantage that’s particularly relevant for sports and action photographers. There is unavoidable screen blackout in the camera’s burst shooting mode as the mirror flips up and down between exposures, but this is rarely an issue – the key point is that there is no lag, and it’s much easier to follow a fast-moving subject with a high-speed DSLR like the Nikon D500 (opens in new tab), for example, than it is with the average mirrorless camera.

4. Size

The most often claimed advantage of mirrorless systems is that they are much smaller than DSLRs. This is the main sell of mirrorless systems: the same size of sensor and image quality as offered by a DSLR without the bulk.

But there are often trade-offs in making a mirrorless camera body so compact, such as battery life, the way a camera handles larger lenses, and how much space there is for external dials and buttons.

Many mirrorless cameras have a very small grip on their front plates, or none at all, rather than the more substantial ones found on most DSLRs. (Image credit: Rod Lawton/Digital Camera World)
(opens in new tab)

Small bodies also mean small controls, and users with larger hands may not find smaller mirrorless bodies easy to use. This extends to touchscreens too, with virtual buttons and controls often too small for them to be keyed comfortably, so although the Nikon D850 (opens in new tab) DSLR seems huge in comparison to today's full-frame mirrorless camera, many of its pro users will prefer its size because it makes it much easier to see and change camera settings – and because it balances better with big lenses, which is what we cover in the next section.

5. Lenses

DSLRs still have an advantage for lens choice, simply because they've been around and supported for decades. Anyone that opts for a Canon EOS DSLR today has 30 years’ worth of native optics to choose from, and many more when you factor in compatible third-party options. Nikon and Pentax are in a similar position with their DSLR ranges.

However, the development of new DSLR lenses has slowed dramatically. Canon and Nikon now put almost all of their lens development effort into mirrorless lenses. Not only that, wider mirrorless lens mounts and shorter back-focus 'flange' distances have given lens designers a blank slate, and many new mirrorless lenses outperform older DSLR equivalents.

Nikon and Canon DSLRs still have the largest lens systems, but mirrorless makers like Fujifilm, Sony, Olympus, and Panasonic are hot on their heels and almost match the range available – and often with more modern lens designs. (Image credit: Sony)
(opens in new tab)

It hasn’t taken Sony long to assemble an impressive range of lenses for its full-frame FE-mount mirrorless cameras (see our list of the best Sony lenses (opens in new tab)), and Panasonic has been smart enough to enter into an L-Mount Alliance with Sigma and Leica to ensure that it's already supported with a large and growing lens range. See our guide to the best L-mount lenses (opens in new tab) for more.

Nikon and Canon have been especially clever with their new full frame mirrorless cameras. Nikon makes an FTZ mount adaptor for using any of Nikon’s current DSLR lenses without restriction. Canon has also launched lens adapters for its EOS R full-frame mirrorless cameras, opening up its entire range of EF DSLR lenses to these cameras.

It still takes time, though. Nikon's new 'baby' DX mirrorless cameras, the Nikon Z50 (opens in new tab), and Nikon Z fc (opens in new tab), still have only three native APS-C lenses.

Fujifilm and Olympus have also had time to develop their own native lens systems, to the degree that none of the mirrorless camera brands is now at any real disadvantage regarding lens choice (see our list of the best Fujifilm lenses (opens in new tab), for example).

The Canon RF 28-70mm F/2L USM is a remarkable mirrorless lens, but just look at the size of it! (Image credit: Future / Matthew Richards)
(opens in new tab)

Some mirrorless makers have produced small or retracting lenses that do offer a size saving, but when lens makers produce mirrorless lenses to match the specifications and performance of DSLR lenses, they end up pretty much the same size.

6. Video

Mirrorless cameras have a considerable advantage when it comes to video, and that's why the best hybrid cameras (opens in new tab) aren't generally DSLRs. First, their design makes them much better suited to the constant ‘live view’ required for video capture. Second, this is where camera makers are concentrating their video capture technologies and where you’re going to get the best video features and performance.

But let's not forget that DSLRs can shoot video too. The Nikon D90 brought HD video to the consumer market, and the Canon EOS 5D II brought DSLRs into the professional videography and film-making arena.

For today’s DSLRs, video capture is a standard feature, and the Nikon D5 (opens in new tab), D850 (opens in new tab), and Canon EOS 5D IV (opens in new tab) offer 4K video capture, while the Nikon D780 (opens in new tab) is as effective for video as any mirrorless camera. Check out our best 4K camera (opens in new tab) guide for more.

Even so, when it comes to 6K and 8K capture, raw or 10-bit video, high frame rates, and more, all the effort and development work is going into mirrorless cameras.

Mainstream mirrorless cameras are now getting very good indeed at video, and the Fujifilm X-T4 brings in-body stabilization and digital image stabilization for video. (Image credit: Fujifilm)
(opens in new tab)

Sony has led the way with high-quality ‘oversampled’ 4K videos in its full-frame mirrorless A7-series cameras like the A7 III (opens in new tab), and Fujifilm and Panasonic now have cameras capable of capturing 4K video at 60/50fps for smooth 2x slow motion effects in the Fujifilm X-T4 (opens in new tab) and Panasonic Lumix GH5 Mark II (opens in new tab) and GH5S (opens in new tab)

The Panasonic Lumix S1H (opens in new tab) has already received accreditation from Netflix for original content creation, along with the best Netflix-approved cameras. The Canon EOS R5 (opens in new tab) also got much attention for its 8K 30p video capabilities, and Sony has joined in with the 8K Sony A1 (opens in new tab), as has Nikon, with the Nikon Z9.

If you only need video occasionally a DSLR will be fine, but if you need to shoot it as an important (or THE most important) part of your work, then mirrorless is the way to go.

7. Battery life

Even very basic DSLRs will happily offer 600 shots per battery charge, but the entry-level Nikon D3500 (opens in new tab) DSLR, for example, can capture up to 1,550 images on a single charge. The very best pro DSLRs can rattle off almost 4000 frames per charge, although this is admittedly with considerably larger batteries. With the Nikon D6 (opens in new tab), Nikon claims a stunning battery life of 3,580 shots – and twice that if the camera is used for high-speed continuous shooting.

You might not give your DSLR's battery much thought, but when you own a mirrorless camera, the state of the battery can become a constant preoccupation! (Image credit: Fujifilm)
(opens in new tab)

Mirrorless cameras, however, fare far less impressively here, with around 350-400 frames per charge being the norm while some are a whole lot less. The Sony A7R III (opens in new tab) ushered in an extended 650-shot battery life almost double that of its predecessors, and the Sony A7R IV (opens in new tab) even improves on that slightly, so that’s a significant step forward, but the Canon EOS RP (opens in new tab) can only manage 250 shots. 

As impressive as the flagship Sony A9 II pro DSLR is, its battery life of around 500 shots with the viewfinder and approximately 690 with the LCD is way lower than rival pro DSLRs like the Nikon D6 and Canon EOS-1D X Mark III. You might need a battery grip (shown here) just to keep up with a day's shooting. (Image credit: Sony)
(opens in new tab)

Mirrorless cameras are inherently more dependent on battery power than DSLRs. Either the LCD display or the electronic viewfinder is on all the time. Furthermore, the fact that most manufacturers try to make mirrorless models as small as possible means that their batteries are also small, which also presents a limit on their capacity. 

Of course, you can buy spare batteries for cameras in both camps, so whether this is as great an issue or not is debatable. One advantage of mirrorless cameras, however, is that many now offer to charge through their USB ports, like the Sony A6400 (opens in new tab), which is very convenient when traveling, though this is starting to appear on DSLRs like the Nikon D780 (opens in new tab), too.

8. Dust

This is a difference between DSLRs and mirrorless cameras that never gets mentioned in the specs sheets but will have come to the attention of anyone who uses both camera types.

With mirrorless cameras, the sensor is much more exposed and much closer to the lens throat of the camera. With DSLRs, the sensor is right at the back of the camera and covered by the shutter and the mirror in front of it – the sensor is only exposed to dust when you take a picture (unless you shoot in live view).

Some mirrorless cameras seem much more susceptible to dust and other sensor debris than others. We have found some Sony cameras particularly prone to sensor dust, while Olympus, Panasonic, and Fujifilm cameras are not affected as badly. Almost all cameras have automatic dust-removal systems that 'shake' the sensor to dislodge any foreign matter, but some are clearly more effective than others.

DSLR sensors may not be as prone to dust spots, but they are a lot harder to reach if you do need to clean them. (Image credit: Future)
(opens in new tab)

However, while mirrorless camera sensors may be more exposed to dust, they are also much easier to clean. DSLR sensors are the very devil to reach with dust-removing gadgets and need a special cleaning mode that locks up the mirror and opens the shutter.

The D850's silent shutter option makes it handy for wedding, social and event photography, but really it's mirrorless cameras that take the lead for silent shooting.
(opens in new tab)

When to choose a DSLR

DSLRs are bigger, fatter, chunkier, and easier to grip. They handle better with telephoto lenses (opens in new tab) and they have more space for external controls, so you spend less time navigating digital interfaces and tapping at touchscreens – and their batteries last all day.

They also have optical viewfinders. Mirrorless users might not care, but DSLR fans would never swap the ‘naked eye’ viewfinder image of a DSLR for a digital simulation, no matter how good.

There’s another thing. If you’re on a tight budget you’ll have to work hard to find a mirrorless camera with a viewfinder for the same price as a DSLR – you will struggle to get a mirrorless APS-C camera with a viewfinder for the same price as a Nikon D3500 or a Canon EOS 2000D. DSLRs are still amongst the best cameras for beginners (opens in new tab).

The Pentax K-1 II is not compact or light by any standards, but it's a solid, old-school DSLR that's built just how many DSLR fans like them.
(opens in new tab)

When to choose mirrorless

Mirrorless camera bodies are smaller and, if you choose carefully, you can get smaller lenses to go with them – though this only really holds true with the Micro Four Thirds format, as APS-C and full frame mirrorless cameras (opens in new tab) come with lenses as large as their DSLR counterparts.

If you’re an Instagrammer, influencer, blogger, or blogger, a mirrorless camera like the Olympus PEN-EPL9 (opens in new tab) or Canon EOS M50 (opens in new tab) is perfect. They’re small, light, and adaptable and have tilting/vari-angle screens that let you shoot from all sorts of angles. They’re great for both video and stills and can easily fit in an everyday bag.

If you’re a pro or semi-pro videographer, mirrorless is the way to go here, too. This is where all the video development in cameras, lenses, hardware, and accessories is happening with cameras like the Nikon Z6 II (opens in new tab) and Sony A7 III (opens in new tab). The Panasonic Lumix S1H (opens in new tab) is a video-centric mirrorless model that's making inroads into the pro cinema market, and the Fujifilm X-T4 (opens in new tab) is a mirrorless camera with video specs that are currently out on its own in this price range.

There is one final paradox. You might say that the DSLR design is retro, but in fact, if you want a camera that looks and feels the way cameras used to, then a mirrorless camera is the way to go! See our guide to the best retro cameras (opens in new tab) to see why, as well as the best rangefinder cameras (opens in new tab).

How we test cameras

We test cameras (opens in new tab) both in real-world shooting scenarios and in carefully controlled lab conditions. Our lab tests measure resolution, dynamic range, and signal-to-noise ratio. Resolution is measured using ISO resolution charts, dynamic range is measured using DxO Analyzer test equipment and DxO Analyzer is also used for noise analysis across the camera's ISO range. We use both real-world testing and lab results to inform our comments in buying guides.

Thank you for reading 5 articles this month* Join now for unlimited access

Enjoy your first month for just £1 / $1 / €1

*Read 5 free articles per month without a subscription

Join now for unlimited access

Try first month for just £1 / $1 / €1

Rod Lawton

Rod is an independent photography journalist and editor, and a long-standing Digital Camera World contributor, having previously worked as DCW's Group Reviews editor. Before that he has been technique editor on N-Photo, Head of Testing for the photography division and Camera Channel editor on TechRadar, as well as contributing to many other publications. 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. Rod has his own camera gear blog at fotovolo.com (opens in new tab) but also writes about photo-editing applications and techniques at lifeafterphotoshop.com (opens in new tab)

With contributions from