Used Canon 6D vs 6D Mark II: which entry-level full frame to choose

At the counter, the question comes up almost every week, always in the same form: I have 600 euros, should I get a 6D with a lens or put it all into a 6D Mark II? These are two cameras that share the name, the format, and the philosophy, but in practice they solve different problems. And the wrong choice is paid for over years, because the Canon full frame DSLR is a track on which EF lenses then accumulate.

In this article, we compare the two camera bodies as we see them in our workshop: sensor, autofocus, ergonomics, recurring defects, and what to check before paying. No absolute rankings. By the end, you should know which of the two makes sense for your type of photography, and in which cases it is better to look elsewhere.

The two cameras in two lines: what they really are

Five years separate the Canon 6D and the 6D Mark II, but on the used market, the price difference is only about 200 euros. This is a fact worth keeping in mind throughout the article, as it challenges the most common assumption: that the Mark II is simply a better version of the 6D. It is the 6D done differently, featuring a list of genuine improvements and at least one documented drawback.

Canon 6D (2012): the full frame that opened the market

In 2012, the 6D was the most affordable full-frame Canon ever listed: it costed significantly less than both the newly released 5D Mark III and the still-available 5D Mark II. 20.2-megapixel sensor, native ISO 100-25600, 11 AF points, 4.5 fps, 770 grams with battery and card: on paper, nothing exceptional even at the time.

The reason it remains relevant in 2026 lies elsewhere. The files are clean, and the dynamic range at low ISOs holds up against much newer camera bodies. The central AF point is sensitive down to -3 EV, a record at launch: this means locking focus in a church at the end of a ceremony or on a bright star without a torch. Those shooting landscapes, astrophotography, or ceremonies in difficult conditions bought it for this, not for the megapixels. If you are interested in the full picture of the model, we discussed it in detail in our in-depth guide on the used 6D as an entry-level full frame.

Canon 6D Mark II (2017): the contested upgrade

The Mark II features a 26.2-megapixel sensor, DIGIC 7 processor, 45 all-cross-type AF points, 6.5 fps, a fully articulating touchscreen, and Dual Pixel AF in live view. In terms of usability, it is a different camera body: the AF module is inherited from the 80D series, and in live view, focusing becomes fluid rather than jerky.

The issue is that specialized press reviews at launch measured a dynamic range at low ISO lower than that of the 2012 6D. Add the absence of 4K in 2017, when even compact cameras had it, and the cropped Full HD. This is not marketing: it is a camera that improves in every aspect except the quality of the base file.

The generational leap lies entirely in ergonomics and autofocus, not in pure image quality. Those working on a tripod with static subjects have little to gain; those chasing moving subjects or working extensively in live view have a concrete reason to spend an extra 200 euros.

Sensor and image quality: where the Mark II falls short

Five years separate the two sensors, and the older one leads in a key parameter: approximately 1 stop more dynamic range at ISO 100. Above ISO 3200, the situation reverses and the DIGIC 7 regains ground, but most buyers of entry-level full-frame cameras shoot at low ISOs on a tripod.

What really changes when recovering shadows in post

Dynamic range translates to one thing in the field: how much you can lift the shadows before the image gets noisy. Concrete scenario: backlit landscape, you expose for the highlights to avoid blowing out the sky, leaving the foreground underexposed. In Lightroom, open the file and lift the shadows.

• 6D, ISO 100: +3 stops in the shadows remain clean; at +4, fine but manageable grain appears.
• 6D Mark II, ISO 100: horizontal banding and chromatic noise in dark areas emerge around +2.5/3 stops.
• Both, ISO 3200-12800: the Mark II stays cleaner with more stable color in the shadows.

Landscape, architecture, interior photography with windows in frame, and astrophotography reveal this difference in every file. Portrait work with controlled lighting, flash ceremonies, or studio still life never encounter it, as exposure is set correctly from the start, requiring no recovery.

Megapixels: when 26 are enough and when they aren't

The 6D produces 5472x3648 pixel files, the Mark II 6240x4160. That's 768 more pixels on the long side, roughly 14%. You won't see the difference in print: both handle a 50x70 without interpolation and without debate.

The difference only emerges when you crop. A 30% crop on the long side leaves about 12 MP usable on the Mark II versus 9.8 MP on the 6D. This matters for those shooting nature or birds with a short telephoto lens — a 300mm when 500mm would be needed — who crop systematically in post. Outside of that case, the extra 6 MP are just a number on the spec sheet that takes up space on the SD card.

Autofocus: the real reason to pay 200 euros more

Eleven points versus forty-five. But the number to watch isn't that one: on the 6D, only a single point is cross-type, the central one. The other ten read contrast on a single axis, and on a subject with marked horizontal lines — the sea horizon, a railing, the line of a shirt — they stall. On the 6D Mark II, all 45 points are cross-type, covering a rectangle much wider than the viewfinder.

This is the difference that justifies the 200 euro gap. Not the megapixels, not the DIGIC 7.

Focus and recompose: why you'll do it often with the 6D

With the 6D, as soon as the subject moves out of the central third of the frame, you no longer have a crosshair point above it. So, focus with the center point, lock, and recompose. It’s a technique that has worked for thirty years, but it has a precise geometric limit: when you rotate the camera, the focal plane remains perpendicular to the optical axis, and the subject ends up outside it.

How much it matters depends on aperture and distance:

• 85mm f/1.4 at 1.5 meters, portrait: depth of field of just a few centimeters. A 15-degree rotation to place the eye on the upper third shifts the focal plane enough to focus on the ear instead of the iris. Error visible at 100%, often even in 30x40 prints.
• 50mm f/1.8 at 3 meters: more generous margin, the error exists but is usually absorbed.
• 24mm f/8, landscape: irrelevant. The depth of field covers everything, and anyway focus for hyperfocal.

If you shoot at f/5.6 or narrower, the 11 points of the 6D will almost never limit you. If your main lens is an 85mm f/1.8 or a 50mm f/1.4 and you photograph people, the Mark II saves you from rejects at every shoot. The same applies to children and dogs: 45 cross-type points track a moving subject, 11 grouped in the center do not.

Dual Pixel AF in live view and video

The leap here is even more distinct, as it is not gradual: it is a different technology. The 6D in live view focuses using contrast detection — the lens moves back and forth to find the sharpness peak, taking a good two seconds, often with a final focus hunt. In video, it is unusable: you focus manually and that is it.

The 6D Mark II uses Dual Pixel CMOS AF: each photosite is split in two, allowing the sensor to perform phase detection directly in live view. Focus is immediate and continuous, and in video it tracks the subject without hunting. It makes a concrete difference in three situations: tripod shooting with the screen open, macro, and any video recording, even occasional.

If you film even just family birthdays, this single feature settles the comparison.

Ergonomics, screen and field use

Hold both cameras with your eyes closed and you won't be able to tell them apart. Same compact body, same deep grip, 770 grams for the 6D and 765 for the Mark II with battery and card. The difference becomes apparent the moment you take your eye off the viewfinder: the 6D forces you to crouch, the Mark II doesn't.

The screen is the same 3-inch, 1.04-million-dot panel, but on the 6D it is fixed to the body and is not touch-enabled. On the Mark II, it is articulated on a side hinge and responds to touch. This is not an aesthetic detail: it changes how you work in three concrete situations.

• Macro and still life on a tripod: with the 6D, you focus in live view by zooming in to 10x using the buttons; with the Mark II, you tap the point on the screen and the Dual Pixel autofocus handles the rest. On a flower at 15 centimeters, seconds turn into successful shutter counts.
• Shooting from below or above the crowd: the Mark II lets you compose using the rotated screen. With the 6D, you shoot blind and correct afterwards.
• Solo video and vlogging: the screen that rotates towards the front is the only way to check the framing while you speak. On the 6D, it is impossible without an external monitor.

Battery and weather sealing are a tie. Both use interchangeable LP-E6 and LP-E6N batteries, with a declared CIPA rating of approximately 1,100 shutter counts on the 6D and 1,200 on the Mark II: two batteries in your pocket cover an entire wedding. Weather sealing is present on both, but it is light: they protect against fine rain and dust, not downpours. Those working in real rain still keep a plastic bag over the camera body, as they always have.

The single slot: the limit shared by both

Neither the 6D nor the 6D Mark II features a dual slot. If a card corrupts, the file from the first dance is gone, and no recovery method will bring it back. For professional weddings, this is a risk managed only through discipline: new cards replaced every 18-24 months, in-camera formatting before every job, and backups to two drives as soon as you return. If a dual slot is a true contractual requirement for you, the correct choice is neither of these: it is the used Canon 5D Mark III, which has CF and SD slots side-by-side and a level of weather sealing in a class of its own.

Connectivity: GPS and WiFi on both, Bluetooth only on the Mark II

Both models feature built-in GPS and WiFi. The GPS writes coordinates to the EXIF data, which is handy for travel, but keep in mind: if left permanently on, it searches for satellites even when the camera is off, draining the battery within a couple of days. Enable it only when needed, rather than leaving it on at all times.

The Mark II adds Bluetooth low energy, which maintains a constant connection with your smartphone. In practice, you transfer a JPEG to your phone without having to repeat the pairing process every time. On the 6D, the WiFi works, but the connection must be established manually for each session, which is a real hassle if you are publishing during the event.

Real prices on the used market and what the two camera bodies are worth today

In the used market, the 6D is found between 350 and 500 euros for the camera body alone, while the 6D Mark II ranges from 550 to 750 euros. The price range depends almost exclusively on two variables: shutter count and aesthetic condition. A 6D with 80,000 shutter count and worn rubber grips is priced at 350 euros; one with 20,000 shutter count, complete with box and two batteries, easily reaches 500 euros.

The hidden cost: EF lenses

The body is the affordable part of the system. Anyone arriving expecting to spend 400 euros will almost always end up with double the budget, because a full frame without decent lenses is just a paperweight. Here is what a sensible used EF kit costs today:

• Canon EF 24-105mm f/4 L IS USM: 350-450 euros used. It is the natural all-in-one zoom for these camera bodies, stabilized and well-built.
• Canon EF 50mm f/1.8 STM: 90-110 euros. Unbeatable value for money, silent autofocus, excellent for environmental portraits.
• Canon EF 85mm f/1.8 USM: 250-300 euros. The pure portrait lens, very fast autofocus, clean bokeh.

The 6D body plus the 24-105 f/4 L and the 50mm f/1.8 comes to approximately 900-1000 euros. With the Mark II, the total reaches 1100-1200. This is the figure to keep in mind when comparing it with any other solution, not the 350 euros for the body alone.

If you're starting from scratch, also check out the EOS RP

If you don't already own EF lenses, the Canon EOS RP challenges both DSLRs. Full frame 26 megapixels, 485 grams, electronic viewfinder, Dual Pixel AF across the entire area. At launch, it was priced above 1000 euros: today it starts at 540 euros with 7 units available. With the EF-RF adapter, it mounts the entire reflex lens lineup without loss of optical quality, so you are not cut off from the used EF market.

The limitations are real and must be stated: LP-E17 battery with modest autonomy, slow burst rate, small grip for those with large hands. If you shoot sports or need 500 shutter count without changing the battery, the 6D Mark II remains more solid in the field.

Those who want to enter the RF system while spending as little as possible, and who accept APS-C, will find the Canon EOS R100 for 375 euros with 8 units in stock: it is not full frame, but it is the most affordable entry point to the RF mount.

What to check before buying a used 6D or 6D Mark II

On a full-frame body from ten or fourteen years ago, the number that matters most is not the megapixel count: it is the shutter count, read together with the physical condition of the camera body. A private seller who cannot tell you how many shutter count the camera has, in 2026, is telling you something. Below is the checklist we use at the counter when a 6D or a 6D Mark II comes in for trade-in.

Shutter count and what it really means

Canon rates the shutter of both camera bodies for 100,000 shutter count. It is not an expiration date: it is the threshold beyond which the failure rate measured in the lab begins to rise. We have seen 6D exceed 180,000 shutter count without a single missed cycle, and we have seen others fail at 70,000. The rating is a statistic, not a countdown.

The shutter count must always be cross-checked with the aesthetics. A camera body declared at 20,000 shutter count but with lifted grip rubber, worn paint on the edges, and a shiny mount is either telling you a lie or has undergone a motherboard replacement that reset the counter. In that case, the fair price is that of an 80,000-shutter-count body, not a 20,000 one.

Common defects we see in the workshop

Every model has its weak points, and for these two, we know exactly where to look.

• 6D — dust on the sensor. The ultrasonic self-cleaning is weak. Stop down to f/16 against a white sky and view the image at 100%: if you see dark spots, it needs cleaning. It is not a major defect, but it should be factored into the price.
• 6D — card slot rubber seal. It can detach or deform. Replacing it is cheap, but if it is completely missing, rain protection no longer exists.
• 6D — battery degraded by GPS. Users who left the GPS active for years have drained the LP-E6 even with the camera off. Verify that the battery holds at least 500 real shutter counts; otherwise, budget 60-80 euros for a new one.
• 6D Mark II — screen hinge. Open the screen and move it: there should be no lateral play, and it must not feel "loose" in any position.
• 6D Mark II — screen flat cable. Intensive use of the articulation wears it out. Rotate the display through all positions with live view on: flickering or momentary blackouts are a sign not to ignore.

On both, then check the mount (grab the attached lens and try to move it: there should be no play), all AF points one by one in manual selection mode, back/front focus with a target tilted at 45 degrees, hot pixels with a 30-second shutter count with the cap on, and the battery contacts for green traces of oxidation.

Who should choose the 6D and who the 6D Mark II

After ten years behind the counter, the profile of customers asking "which of the two" narrows down to four recurring cases. There is no better camera: there is a camera that wastes less money based on what you actually shoot.

The most common case is the fourth one. Those who arrive with a total budget of 700 euros and buy the Mark II are left without a decent lens, and end up mounting a tired 24-105 that wastes the 26 megapixels. A 2012 camera body with a fast prime lens in front takes better photos than a 2017 body with a mediocre all-rounder. If this logic convinces you, the reasoning is the same as we apply to Nikon: you can find it in Nikon D700 vs D750 used.

When neither option is the right answer

There are requests where selling a 6D means selling the problem, not the solution.

• Sport and fast action. You need genuine burst rates and tracking. Even the 45 points of the Mark II cannot track a cyclist coming head-on at 6.5 fps. Look at a 7D Mark II or a recent mirrorless.
• Serious video. Neither records usable 4K. The Fujifilm X-H1 at 650 euros features in-body stabilization, F-Log, and true 4K: for those who film, it's a different world.
• No EF lenses at home and a desire for lightness. If you're starting from scratch, the Nikon Z50 Mark II at 625 euros or the Sony a6500 at 600 euros stay under 600 grams with battery (550g for the Nikon, 453g for the Sony) and focus better than both DSLRs.
• Those who want full frame to solve other issues. The format does not fix a wrong composition or flat light. If your APS-C cameras feel restrictive only in portraits, often a 56mm f/1.2 or a bright 85mm is enough, not a new body.

Used full-frame alternatives in the same price range

Sticking with the Canon duopoly out of habit costs more than it seems. In the 350-750 euro range, the used market offers at least three full-frame camera bodies that deserve an honest comparison, and two of them are Nikon.

The 2013 Nikon D610 is priced between 400 and 550 euros. Its 24-megapixel sensor offers superior dynamic range compared to both Canon models: shadow recovery at ISO 100 without banding, which is exactly where the 6D Mark II struggles. The 39-point AF module covers a wider area than the 6D's 11 points. We discussed this in detail in the article dedicated to the used Nikon D610.

The Nikon D750 is priced between 650 and 850 euros, placing it above the 6D Mark II. It features 51 AF points, a tilting screen, and, most importantly, dual SD slots: if you shoot weddings, it is the only camera body on this list that allows you to write to two cards in parallel. Neither of the Canon models offers this feature.

Sony A7 first series: full frame at 400 euros, with reservations

We have today a Sony A7 for 400 euros, serviced and with a 2-year warranty. It is the lowest entry price for full frame that exists, and it is worth understanding what it really includes.

What you get: 24-megapixel sensor, electronic viewfinder with real-time exposure, 474-gram body, and a short flange distance that accepts virtually any manual lens via adapter — Nikon AI, M42, Contax Zeiss, Canon FD.

What you lose, and it’s not a small amount:

• Slow autofocus: first-generation hybrid system, unusable on moving subjects. Compared to the 45 points of the 6D Mark II, it's no contest.
• NP-FW50 battery: approximately 300 real shutter count. You need 3 batteries for a day, compared to the over 1,000 declared for Canon with LP-E6.
• Noisy shutter: the "clack" of the first A7 is among the loudest ever mounted on a mirrorless. It's audible in church or at the theater.
• Ergonomics: short grip, confusing menus, small buttons. With a 70-200 mounted, the balance is off.
• Expensive FE lenses: the native Sony autofocus lens lineup starts at high prices even on the used market.

The lens park factor: the variable that decides everything

This is the question we always ask at the counter before recommending anything: how many lenses do you already have?

If you own a 24-105, 50mm, 85mm, and a 70-200 in EF, switching to Sony means selling everything at a loss or dealing with adapters. The savings on the camera body vanish with the first lens you have to buy again. However, if you are starting from scratch, a full-frame DSLR is not automatically the right path: it is worth considering mirrorless options before making a decision.

What we do in our lab for every 6D and 6D Mark II

The shutter count is always listed on the product sheet. It is not a courtesy: it is the data that determines whether a camera body is worth 380 euros or 480 euros, and hiding it means selling in the dark.

Every 6D and 6D Mark II that comes in goes through the bench before it hits the display. The procedure is the same for both camera bodies, with the only difference being the number of AF points to verify: 11 on the first series, 45 on the Mark II.

• Shutter count reading from EXIF using dedicated software, not from the camera menu (Canon does not expose it). The number is listed on the product page exactly as read.
• Wet sensor cleaning, with inspection at closed aperture on a uniform surface to reveal traces not visible at f/4.
• Testing all AF points on target: each point is engaged individually. On the Mark II, this means 45 checks, and it happens that one is sluggish in the periphery.
• Back and front focus verification on an inclined scale, using a reference lens. If necessary, the deviation is noted rather than silently corrected via micro-adjustment.
• Mount integrity: lateral play with a 24-70 mounted, condition of the screws, and mount seal.
• Shutter test at all speeds, from 30" to 1/4000. Slowing curtains reveal themselves at fast speeds, not slow ones.
• Battery under load: a swollen LP-E6N or one with oxidized contacts can cause the camera to shut down mid-service even if it reads 100% at rest.
• Test shot at high ISO and long exposure with the cap mounted, to bring out hot pixels. On 2012 bodies with many hours of astrophotography behind them, a few bright spots may appear.
• Rubber and coatings: grip, card door, connector cover. These are the parts that wear out first and the only ones we explicitly mention when worn.

What we do not do is refurbish a body to make it look new when it is not. If a 6D has 68,000 shutter count, a marked prism corner, and a lifting thumb grip, it sits in the display case at 350 euros with everything written down. The buyer knows exactly what they are taking home.

On every used camera body, including the 6D and 6D Mark II, we provide a 2-year warranty. This is why the inspection happens before, not after: a camera that comes back after three months costs us far more than the time spent testing it at the counter.

Frequently asked questions

Let's talk before you buy

If you have doubts about a purchase or need advice for your specific case, contact us. We provide free advice because we are photographers first, and because a customer who makes a bad purchase won't return to photography.

Three ways to get in touch:

• Contact form — response within 24 business hours
• WhatsApp at 342 362 3454 (messages only)
• Phone: 071 291 6347 (Mon-Fri 9-13/15-18, Sat 9-13)

If you want to see what we have in stock right away, explore the used gear available today: every camera is certified, comes with a 2-year warranty, and ships within 24-48 hours.

Article written by Matteo for the ReflexMania Team. Last updated: August 2026. Prices and availability as of the date of publication.