When I retired my Canon 5D Mark III for the Canon EOS R5, I of course had high hopes, but also some trepidation. As a professional and long time Canon user, I expected that I’d bought a camera that I’d be hauling round for the next five years and that would - if previous experience was anything to go by - be a reliable replacement. The questions I was asking myself were, would the cameras increasingly complex electronics provide the same reliability as the comparatively simple, and bomb-proof, 5D series and as this new camera had a new RF mount and so required a whole new - and unfailingly expensive - suite of lenses, would it be worth the eye watering outlay?
As a photographer who spends a fair bit of my time in the dimly lit chaos of art galleries and museums—snapping moving people as well as static scenes like room interiors or urban landscapes—I’d become well used to the 5D Mark III’s limits. The R5 promised some improved specs, 45 megapixels, 8K video, blazing autofocus, and In-Body Image Stabilization (IBIS) for $3,899 (body-only)—not forgetting a whole new set of lenses(!)..
Would this be a very expensive replacement or a genuine upgrade for a working freelancer and make the wallet ache less nagging?
A quick note on purchasing, I bought mine - and subsequently two lenses - from grey market vendor Panamoz at a substantial discount over retail. I’ve not had to return anything thus far, so I haven’t experienced their customer service, but the price and delivery times were very good.
First Impressions: Unboxing and Build
At 738 grams with battery and card, it’s lighter than the 5D Mark III (860 grams) yet feels premium—magnesium alloy, weather-sealed, unfazed by drizzle. The grip fits my hand better than the 5D’s, the layout familiar enough to not cause problems even on the first few shoots, though the smaller joystick took a day to master. Initially, I used the 3.2-inch articulated touchscreen folded flat like the 5D’s fixed screen, but later I realised its usefulness, when shooting low angle, long exposure shots on a tripod, I could flip out the screen and not have to sit on the floor to see the preview, when shooting wide angle room shots pinned in a corner I could preview the shot from above instead of crushed against a wall, the same for high-angle crowd shots. In fact on a tripod I almost always use the screen flipped out now, like I’m looking into a TLR. I’m looking forward to shooting this way for portraits too, the camera no longer between me and the subject. The 5.76-million-dot EVF is bright, crisp, lag-free—I loved the optical viewfinder of the previous camera but being able to see if your exposure is off through the viewfinder on a fast moving shoot is a useful and once you have the muscle memory dialled you can even review shots through the viewfinder without chimping.
The Sensor and Image Quality: 45 Megapixels — High ISO, IBIS-Powered
The R5’s 45-megapixel full-frame CMOS sensor, paired with the DIGIC X processor, was a seismic shift from my 5D Mark III’s 22.3-megapixel chip—my companion through years of events and commercial studio and location shoots. It’s not just the resolution that hooked me; it’s how this sensor, with IBIS and high ISO prowess, transformed my work. The unstabilised 5D Mark III feels a bit clunky by comparison.
First Test: Resolution and Dynamic Range
My first R5 shoot was a golden-hour lake—ripples, clouds, a heron—shot RAW at ISO 400 with the RF 24-70mm f/2.8L. The 45 MP nabbed insane detail: feather edges, sky gradients, distant bark. The 5D Mark III’s 22.3 MP handled 20x30 prints, but its files looked coarse next to the R5’s clarity. Dynamic range is improved, sure, but it never seems like enough, I guess starting your career shooting film means we’re hoping for film equivalence at every upgrade, so far I think we’re still a little way off. Maybe the MkII?
Portraits and Events: Detail That Pops
At art openings, snapping portraits amid moving crowds, the R5’s resolution shines. With the RF 85mm f/1.2L at ISO 800, animated people can be shot at high ISO but the images are crisp. The 5D Mark III at ISO 400 softened those details, and cropping was futile. The R5’s 45 MP lets me reframe candids and still print large—freedom the 5D denied.
High ISO Noise: The Low-Light Lifesaver
High ISO is my lifeline in galleries and museums—dark, flash-free zones with restless subjects. The 5D Mark III maxed at ISO 6400; beyond that, noise got chunky, colors dulled, details vanished. At a jazz club, I pushed it to ISO 12,800 with the EF 50mm f/1.4—hoping to freeze a musician—and got a speckled mess. Even at ISO 3200, my gallery norm, the 5D’s grain ate shadows and flattened tones, needing cleanup that blurred faces.
The R5 rewrote that tale. At a fundraiser—candlelight only—I shot ISO 8000, f/1.8, 1/40th with the RF 35mm f/1.8. Noise was fine, almost cinematic, with true colours—deep blacks, warm skin. At ISO 12,800, grain stayed tight, details like glass reflections held. The 5D at ISO 6400 was mottled; the R5 at twice that is printable with light work. It’s two stops better—vital for my handheld low-light shooting.
Static Shots: Low ISO and IBIS Magic
For static shots— interiors, urban landscapes—the R5’s low ISO quality plus IBIS is transformative. At ISO 200, f/8, 1/4 second with the RF 24-70mm, I shot a museum room handheld—marble crisp, colours vivid, no noise. The 5D Mark III at ISO 100 was clean but shaky; without a tripod, I’d hit ISO 800, adding faint grain that dulled purity.
This is handy when you go to shoot an event, without a tripod, and are unexpectedly asked to shoot an interior.
IBIS Explained: What It Is and How It Works
What’s IBIS? In-Body Image Stabilization moves the sensor to counter shake—tiny motors shifting it side to side, up and down, or tilting it. The 5D Mark III had none, relying on steady hands or tripods. The R5’s IBIS, rated up to 8 stops with RF lenses, offsets my wobbles—key for slow shutters in dim light. At 1/4 second, where the 5D blurred, the R5 holds firm.
IBIS and In-Lens Stabilization: A Dynamic Duo
The R5’s IBIS syncs with in-lens optical image stabilization (OIS). OIS shifts lens elements to correct shake—Canon’s old trick (some EF lenses had it, not my 5D kit). IBIS handles pitch, yaw, and roll (rotation OIS can’t touch), while OIS fine-tunes X/Y shifts. With the RF 24-70mm f/2.8L (OIS-equipped), I hit 8 stops—shooting 1 second handheld at ISO 200, f/11 for a dusk cityscape, every line tack-sharp. With the non-OIS RF 50mm f/1.2, IBIS alone gives 5-6 stops—1/2 second at ISO 100 for a gallery sculpture, tripod-free. The 5D Mark III? Tripod or bust at ISO 100; the R5’s IBIS-OIS combo keeps ISO low, shutters slow, quality high—all handheld.
The Trade-Offs and Verdict
Downsides? The R5’s 50-60 MB RAW files dwarf the 5D’s 25 MB, taxing storage on 1,000-shot events. At ISO 25,600+, noise creeps in, though leagues better than the 5D at 12,800. IBIS falters at 2 seconds with shaky hands, but I rarely push it. The 5D Mark III’s quality was decent once, but its noise and lack of stabilization hobbled me. The R5’s 45 MP, dynamic range, high ISO control, and IBIS-OIS synergy redefine my workflow—from event hustle to serene landscapes—with quality I trust.
Autofocus: The Game-Changer That Rescued My Low-Light Event Photography
In the dim, elegant chaos of galleries and museums—capturing moving people under faint lights—the 5D Mark III’s 61-point autofocus was a sparring partner I tolerated. The R5’s Dual Pixel CMOS AF II turned that struggle into a triumph.
The Specs: From Barely Coping to Superhuman
The 5D Mark III’s 61 points, -2 EV centre point, and 6 FPS burst stumbled in gallery gloom, with no stabilization to help. The R5’s 1,053 points cover 100% of the frame, focus to -6 EV—near-darkness the 5D couldn’t touch—and track eyes with AI.
Events: From Guesswork to Precision
Events are my bread and butter—guests weaving through dim rooms under spotlights. With the 5D Mark III, I’d use the EF 50mm f/1.4 at ISO 3200, leaning on the centre point to catch a face before it turned. Its 6 FPS and sluggish servo mode missed the pace—sharp shoulders, blurry grins, 30% keepers. The R5’s Eye AF nailed it. At an event, with the RF 35mm f/1.8 at ISO 6400, f/1.8, 1/40th, a curator darted through; 12 FPS mechanical locked her eyes. At 20 FPS electronic, I caught a patron mid-toast—flawless in near-dark corners.
Moving Crowds: Tracking Chaos with Ease
People pivot, drift. The 5D’s zone AF could hunt, unable to grab a detail to focus on, servo faltering in gloom. The R5’s Face + Tracking is a lifesaver— eyes tack sharp at 12 FPS, silent at 20 FPS all without the 5D’s clatter. Switch to electronic shutter and the shooting is completely silent. When working alongside videographers that are recording sound - a boon. Gone is the need to shoot video and stills separately.
Low Light: Seeing What the 5D Couldn’t
Low light—spotlights, LEDs, exit signs—is my norm. The 5D’s -2 EV limit forced noisy ISO 6400 shots or banned flash. The R5 at ISO 8000, f/1.2, 1/30th with the RF 85mm—IBIS steady, AF tracking a speaker’s eyes under a lone light—delivered clean intimacy the 5D couldn’t.
The Adjustment and Rare Stumbles
The 5D’s simple AF was clunky but predictable. The R5’s options—tracking, eye detection—took tweaking; the joystick’s small. The first modification I made tyo the camera’s layout, as always, was to set up back button focussing. Now I have AF-ON button for eye detection AF and the * for simple one-point AF - for when I’m shooting subjects other than people.
The R5’s autofocus is the one feature that justifies the upgrade alone. Instead of fixing focus on a face and recomposing, continuously, for the 8 hours of a shoot, the R5 grabs focus on the eye of the subject you want and tracks as they move around the room. The subject moves, you keep your finger on the back button - it feels like the camera is doing half of the work for you. It was so easy it actually made me guilty on my first shoot with the camera! This feature is obviously incredibly useful for events, photographing a speaker or athlete but also really useful for portraiture where you’re shooting with a small depth of field. Instead of getting 1 in 5 pin-sharp portraits, the R5 makes it 4 in 5, game-changing.
One of the plus points of the system is that once focussed the camera will track your subject relentlessly, rareely dropping tight focus. That’s great but can be frustrating in crowded rooms if the camera fixates on a person other than your intended subject.
Many years ago I had a Canon EOS 30, in fact it’s the only 35mm film body that I still own. It had Eye tracking autofocus that worked in a fairly acceptable way once you’d calibrated it. It seemed to work by choosing the one of its focussing points closest to the one you were looking past as you looked at the subject, now the R5 has arrived with eye tracking, I immediately saw how these two technologies would be a perfect match. I subsequently found that eye control is back and was in the pricier R3 body, later on Canon announced it would be in the updated R5 mkII.
Shooting Modes and Speed
The R5’s 12 FPS mechanical or 20 FPS electronic burst catches event action—a toast, a kid darting—where the 5D’s 6 FPS lagged. With a CFexpress card, I get 180 RAW shots before slowing; the 5D managed 18. The silent electronic shutter is stealthy—no clack to break a hush.
Lenses: The RF Advantage
RF lenses like the 24-70mm f/2.8L and 85mm f/1.2L shine on the R5, sharper and faster than my EF glass on the 5D. Adapting my EF 50mm f/1.4 worked, but AF lagged. RF prices bite, but the quality is step up over the EF glass and probably just if not more importantly for an ageing professional, the lenses are lighter. The 70-200 2.8 significantly so, after 6 months I realised that I no longer suffered from elbow and forearm issues I had when shooting heavy schedules with the 5D.
RF Lenses: Spotlight on the RF 28-70mm f/2.8 and My Beloved RF 70-200mm f/2.8
The R5’s RF mount unleashed lenses that eclipse my EF kit, and two have redefined my shooting: the RF 28-70mm f/2.8 IS STM and my favorite, the RF 70-200mm f/2.8L IS USM, which replaced my cherished but back-breaking EF 70-200mm f/2.8L IS II USM.
The RF 24-70mm f/2.8L’s constant f/2.8 aperture thrives at events where you need versatility in low-light conditions. At a museum opening, I shot ISO 1600, f/2.8, 1/60th—28mm for wide room shots, 70mm for tight candids. The 5-stop IS, paired with IBIS for up to 8 stops, kept everything sharp handheld—impossible with my unstabilised 5D Mark III and EF 24-70mm f/2.8L. Sharpness is stellar centre-frame and weather-sealing has held up in some forays to the Lake District, and its collapsed length fits my bag like a glove.
The RF 70-200mm f/2.8L IS USM is my soulmate, dethroning my EF 70-200mm f/2.8L IS II USM—a 1,490-gram beast I loved for its reliability but loathed for its heft. The RF version, at 1,070 grams and 146mm retracted (vs. the EF’s 199mm), is a revelation—I swapped after one gallery shoot. At an art auction, I shot ISO 6400, f/2.8, 1/50th—70mm for groups, 200mm for bidder faces—and the 5-stop OIS plus IBIS kept frames crisp, no tripod needed. The 5D with the EF lens demanded ISO 12,800 or flash there, ruining the mood. Dual Nano USM motors deliver silent, lightning-fast AF—tracking a speaker’s eyes mid-pace better than the EF’s older system. Optically, it’s a hair sharper at 200mm, with less chromatic aberration (purple fringing plagued the EF in backlit shots). The floating element design cuts breathing—zooming keeps subjects steady, unlike the EF’s slight shift—perfect for framing tight portraits. Bokeh is buttery, with 9 rounded blades vs. the EF’s 8, rendering gallery backgrounds lush. Weather-sealing shrugged off dust in a cavernous museum, though the extending barrel (unlike the EF’s fixed length) made me paranoid—unfounded so far. It lacks teleconverter support (the EF took a 1.4x and a 2x), but the newer RF 70-200mm f/2.8L IS USM Z ($3,000) adds that—I’m tempted. At 200mm, its 0.7m minimum focus (vs. the EF’s 1.2m) let me nab close-ups of art details, a bonus for room shoots. The EF was a pro legend—rugged, trusty—but the RF version trims fat, boosts finesse, and pairs with the R5 like they were born together.
Battery Life: A Mixed Bag
The LP-E6NH lasts 400-500 shots casually, but events with AF and bursts drain it—300 shots max. The 5D Mark III’s 950-shot stamina spoiled me; I now pack spares.
Overheating and Video (A Sidebar)
I’ve dipped into 4K HQ—stunning—but 8K overheating (20-30 minutes) doesn’t bug me as a stills shooter. The 5D Mark III’s 1080p was basic; the R5’s video is a bonus I rarely use.
Real-World Adventures
At a museum, the R5’s sealing laughed off dust, and IBIS nailed handheld dusk shots. Events? Silent shutter and AF tracked flawlessly. The 5D couldn’t keep up.
The Little Things
Dual slots (CFexpress/SD) are handy, in fact the R5 is the first body I’ve owned with dual card slots and this coincided with - for first time in 22 years of shooting - a card fail (Sandisk CFExpress), I was more than grateful that the SD backup (JPEG only) saved the shoot. The twin slot does mean that though my camera is set up to not shoot without a card inserted as a precaution, the presence of the two slots means it will shoot without a CF card, meaning you get back to the edit realising you have JPEGs only. CF card checks have to be part of the pre-shoot routine.
The Verdict
AF masters low-light events, IBIS frees static shots, and image quality crushes the 5D Mark III. The RF 70-200mm f/2.8L—lighter, sharper than my old EF fave—and the RF 28-70mm f/2.8 seal the deal. Pricey? Yes, but it’s improved the quality of my work which is all you can really ask for. Oh, I guess eye control autofocus, which is of course available on the mk2. Canon do know how to dangle a carrot.