Used full-frame DSLR or mirrorless: what is best for those switching to full frame

At the counter, the question almost always comes in the same form: I have had an APS-C camera for a few years, I want to switch to full frame, should I go for a used DSLR that costs less or a mirrorless that is more modern? The honest answer is that it depends on what you photograph and, above all, on how many lenses you already have at home. Neither system is wrong, but choosing for the wrong reason costs a 500-euro difference and two years of frustration.

In this article, I lay out the numbers that truly matter: the price of the camera body, the price of the complete kit, the typical shutter count found on the used market, and what concretely changes in daily use between a DSLR and an electronic viewfinder. No generic rankings: precise use cases and current market figures, August 2026.

What really changes when switching to full frame

The jump from APS-C to full frame is worth about one stop of noise. Not three, not "another planet": one stop, assuming the same sensor generation. Those who come to the counter convinced that full frame will fix noisy high-ISO photos usually have a problem with slow lenses or shutter speeds, not the sensor. It is worth understanding what you are buying before spending twice as much.

One stop of gain, not a revolution

In practice, a Sony A7 III at ISO 6400 produces the same noise as a Sony A6100 (€550) at ISO 3200. This is a real and measurable advantage, but it only matters when working in low light: church weddings, interiors without flash, concerts, and evening reportage. For landscape photography at ISO 100 on a tripod, the difference between the two files is invisible even at 100% zoom.

The second tangible benefit is depth of field: given the same framing and aperture, the full frame isolates the subject from the background approximately one stop more aggressively. This matters for portraiture. For product or group photography, it is often an issue to manage by stopping down further.

What you lose: weight, lens prices, telephoto reach

The crop factor is not just a penalty: on telephoto lenses, it's a gift. A 70-200 f/2.8 mounted on APS-C frames like a 105-300 mm. Switching to full frame, that advantage disappears, and to achieve the same reach, you need a 100-400, which costs more, weighs more, and has a maximum aperture of f/5.6 instead of f/2.8.

• Wildlife and sports: full frame is often a step back. A Sony a6500 at 600 euros, with in-body image stabilization and dust and moisture resistance, remains a more sensible choice than a full-frame camera at the same price.
• Weight: the camera body increases slightly, but lenses significantly. A full-frame kit of three lenses typically weighs 1-1.5 kg more.
• Wide angle: here, full frame truly wins. A 16 mm lens stays 16 mm, without becoming a 24 mm equivalent.

When it makes no sense to switch

If your current kit is entirely EF-S or E in APS-C format, switching means repurchasing your entire lens lineup. That cost must be calculated before, not after, selling the camera body. These are the cases where we recommend staying with your current system:

• You will almost always shoot in full light or with flash.
• You print up to 30x45 cm: a 24-megapixel APS-C sensor handles this effortlessly.
• You only publish online, where the file is recompressed and resized.
• The budget covers the camera body but not the lenses: a full-frame with a slow zoom performs worse than an APS-C with a 35 mm f/1.8.

Full frame solves specific problems. If you don't have them, it won't solve anything.

Used full-frame DSLR: full format at the lowest price

In 2023, a Nikon D750 in excellent condition was priced around 900-1,000 euros. Today, the same camera in the same condition trades between 600 and 700 euros. The camera hasn't changed: the market has. Wedding photographers have moved to the Z6 II or the Z8, and DSLR bodies have flooded the used market all at once over the last three years. This is the moment when full-frame costs less than it ever has.

The models with the best price/performance ratio

Four names cover practically the entire sensible range. The figures are indicative market prices for camera bodies in excellent condition, with certified shutter count.

The D750 remains the benchmark under €700 for those working with people. Dual slots, autofocus that holds up in church, and files that withstand shadow recovery. The Sony A99 exists, sitting at €500-600, but the A-mount system is closed and lenses are hard to find: we mention it for completeness, but do not recommend it to those starting now.

Legends that cost more than they are worth today

Nikon D700, Canon 5D Mark II, Nikon D3. Cameras that made history and are now sought after at prices far exceeding their actual capabilities. We are talking about 12-21 megapixels, truly usable ISO levels that top out around 3200, and video that is either absent or unusable.

People buy a D700 for the sound of its shutter and how it feels in the hand, not because the file is better than that of a D610 costing 450 euros. It is a legitimate choice, but it must be made knowing exactly what you are buying. We have written about this in detail in this analysis dedicated to the used D700.

Optical viewfinder: why it remains irreplaceable for some

The pentaprism has no lag, does not consume battery, and does not turn off. Below minus ten degrees, with the battery at a quarter, you continue to see the scene. An electronic viewfinder in those conditions becomes sluggish and the camera shuts down sooner.

Battery life is the most tangible metric: 900-1,200 real shutter counts with a full-frame DSLR versus 300-400 for a mirrorless of the same generation. For a wedding, that means two batteries instead of five.

Used full frame mirrorless: what you pay extra and what you get

The cheapest full frame mirrorless camera passing through our counter costs 400 euros. It is a Sony A7 first series, 24 MP sensor, and at that price it has no rivals on any system. The point is to understand what that number entails, because the price gap between DSLR and mirrorless narrows only on first-generation bodies.

Sony A7 first series: the most affordable full frame on the market

The 2013 A7 delivers excellent files but has precise operational limits. The autofocus is hybrid, featuring 117 phase-detection points, but by today's standards it remains slow: it hunts and struggles in low light. The buffer fills up after a few shutter counts, and then the camera body locks up until it has written the data. The grip is small, and with a 70-200 mounted, the balance is front-heavy. The NP-FW50 battery lasts around 300 real-world shutter counts, so you will need at least two spares.

Translated: for landscape, architecture, and still life on a tripod, it’s a deal that’s hard to beat. For a wedding or a match, it’s the wrong camera, and no discount makes it right. We’ve written a dedicated in-depth guide to the first-generation A7 with operational details.

Canon EOS RP and EOS R: the smooth transition for those with EF lenses

If you are coming from a Canon DSLR, this is the real argument in favor of mirrorless. With the EF-RF adapter, existing EF lenses work 100%, including autofocus: no loss of functions, no compromise on focus. It is not a workaround, it is how Canon designed the transition.

• Canon EOS RP — from 520 to 600 euros. Lightweight and compact camera body, the most affordable entry into the RF system.
• Canon EOS R — 800 euros. Better electronic viewfinder, sturdier camera body, ergonomics better suited for heavy lenses.

With seven RP units in stock, the choice comes down to the shutter count and cosmetic condition, not availability. This is the case where it pays off to ask which specific camera body has the least wear.

Electronic viewfinder, eye-AF and stabilization: the three real advantages

The electronic viewfinder displays exposure and white balance before the shutter count: you make fewer mistakes and waste fewer frames. Focus peaking makes manual lenses usable, something that on a DSLR optical viewfinder is an exercise in faith. Eye-detection keeps the eye in focus at f/1.4, where a central point phase-detect AF with recomposition on a DSLR regularly fails.

A clarification we always make at the counter: neither the EOS RP nor the first-generation A7 has in-body image stabilization. The IBIS advantage often discussed applies to the A7 II and later models. If you are looking for a mirrorless camera specifically for stabilization, those two camera bodies do not provide it.

The real cost: body plus lenses, not just the body

You buy the camera body once, but you keep the lenses for ten years. That’s where the price difference between the two systems becomes serious, far more than the €300–400 gap on the body. Let’s do the math with a basic three-lens kit: a wide-angle zoom, a fast normal lens, and a lightweight telephoto. Not a professional setup, but what you actually need when switching to full frame.

Three lenses in a DSLR system: current used market prices

The EF and F lens park is saturated. It represents thirty years of production, millions of units, and an entire generation that has phased them out in favor of mirrorless. Prices reflect this reality.

On the Nikon side, the costs are similar. An AF-S 17-35mm f/2.8 is found around 500 euros, a 50mm f/1.8G is under 150, and a 70-200mm f/4G VR ranges from 550 to 650. The total is 1,200–1,300 euros, with a wide-angle and a telephoto lens of superior quality compared to the Canon trio. If you prefer to stay lower, the 24-85mm f/3.5-4.5G VR at 200 euros covers the standard zoom range and brings you back under 900.

The same three focal lengths in RF, Z or E: the difference in euros

Native mirrorless lenses have two issues in the used market: they have been in circulation for a much shorter time, and owners tend to keep them. As a result, used prices are only slightly lower than new ones, and some affordable focal lengths simply do not exist.

• The 90 euro 50mm doesn't exist. The RF 50mm f/1.8 STM starts at 130-150 euro used, the Nikon Z 50mm f/1.8 S is around 400-450.
• The budget wide-angle doesn't exist either. An RF 15-35mm f/2.8 L runs over 1,500 euro. The f/4 alternatives, like the RF 14-35mm f/4 L, are newer and have depreciated less.
• The f/4 telephoto costs twice as much. A used RF 70-200mm f/4 L rarely drops below 1,100 euro.

In practice, the native mirrorless kit costs 40-60% more than the same kit on a DSLR. This is not a theoretical percentage: it is the difference between spending 900 euros and 1,500 euros for the same three focal lengths.

The adapter: when it works well and when it doesn't

This is the loophole, and it’s a real one. Anyone switching to Canon or Nikon mirrorless can mount their older lenses with an adapter that degrades nothing.

• Canon EF-EOS R: works without compromises. Autofocus, IS, corrections, everything. On the used market, it costs around 80-130 euros. A Canon EOS RP at 520-600 euros plus the adapter lets you use the entire existing EF lens lineup. The Canon EOS R at 800 euros does the same with a better viewfinder and ergonomics.
• Nikon FTZ and FTZ II: excellent with AF-S and AF-P lenses, 120-150 euros used. Old screw-drive AF lenses (without internal motor) will not focus: check the designation before buying.
• Sony LA-EA and Sigma MC-11: here the limitations are real. Continuous AF on moving subjects is less reliable, and some combinations lose eye-detection. On Sony, the adapter is a workaround, not a strategy.

If your goal is full frame at the lowest total cost, it remains the case that a high-end used full frame DSLR with three EF lenses costs less than an entry-level mirrorless with only two native lenses.

Shutter count, shutter and wear: what to check before buying

The shutter count is the first number I ask for when a full-frame DSLR comes in for trade-in. Not because it's the only health indicator, but because on DSLRs it's the only objective data point regarding a mechanical component with a finite lifespan. A mirrorless with 20,000 shutter count and a DSLR with 120,000 can cost the same on the market: the risk you take bringing them home is very different.

How many shutter counts are too many, by model

Manufacturers declare a number of cycles tested in the laboratory. It is not an expiration date: it is a statistical average. A shutter can fail at 80,000 cycles or reach 300,000. It serves as a reference to understand where the camera body stands in its life cycle, and above all to determine whether the price accounts for wear.

The practical rule I use at the counter: once the declared shutter count exceeds 60%, the price must drop significantly, not just by 5%. A D750 with 100,000 shutter count is not worth the same as one with 30,000. Replacing a shutter on a full-frame body costs between 250 and 400 euros for parts and labor: on a camera body worth 500 euros, that is a heavy line item. Below 30% of the rated cycles, the count stops being a bargaining chip.

On Nikon, the shutter count can be read from the EXIF metadata of a freshly taken JPEG file, using EXIFTool or an online service. On Canon, it is not present in the EXIF: you need a utility like ShutterCount that queries the camera body connected via USB. If the seller does not provide it, ask for it: it is a piece of data that can be extracted in thirty seconds. A refusal is information.

The specific issue with mirrorless cameras: exposed sensor and IBIS

On mirrorless cameras, the shutter count matters less, as many rely on the electronic shutter, leaving the mechanical shutter with minimal wear. The weak point lies elsewhere. Without a mirror acting as a barrier, the sensor is exposed to dust with every lens change, and on a body that has endured years of reportage, contamination can be significant.

The test is simple: take a shot at f/16 against a uniform sky or a white wall, then open the file and increase the contrast. Dark spots will immediately stand out. Surface dust can be removed with a cleaning. Spots that remain after cleaning are something else: shutter oil or scratches on the filter. Those won't go away.

Regarding IBIS, there are two checks to perform with the camera body powered off and stabilization disabled:

• The sensor group must remain stable. A slight amount of play is normal on bodies with stabilization, but it must not rattle or move abruptly when you tilt the body.
• Upon powering on, the mechanical noise should be a brief hum. Continuous ticking or a scraping sound during the shutter count indicates a fatigued suspension assembly.

What we do in our lab

Every camera body that enters ReflexMania goes through the technical bench before being put up for sale. It is not a formality: it is what allows us to state a certified shutter count on the product sheet instead of writing "little used".

• Shutter count reading on every camera body, reported in the product sheet.
• Autofocus test on all points, not just the central one, with front and back focus verification.
• Sensor check at f/16 with post-processing file examination to identify spots and residue.
• Wet sensor cleaning when needed, included in the service.
• Battery retention and card slot check: oxidized contacts and bent pins are a more frequent issue than the shutter.

We provide a 2-year warranty on all used equipment. If the shutter count fails after eight months, the problem is ours, not yours. That is also why we do not sell camera bodies that our workshop rejects.

How to choose based on what you photograph

The right question is not "DSLR or mirrorless", but "what do I photograph 70% of the time". A portrait photographer and a landscape photographer spending the same 600 euros should take home two different camera bodies. Here are the four scenarios we see most often at the counter, with the straight answer.

Portrait and wedding: mirrorless wins with eye-AF

Here, the advantage is measurable, not theoretical. At f/1.4 on an 85mm lens, the depth of field at two meters is just a few centimeters: the eye is either in focus or it isn't; there are no in-between options. With a DSLR, you use the central AF point, lock focus, and recompose, but the focal plane shifts just enough to throw the ear into focus instead. With eye-detection, the focus point tracks the pupil as the subject moves.

At a wedding, where you cannot retake the shot, this difference justifies the premium. The Canon EOS RP starts at 520 euros in our catalog and is the most sensible entry point for those working on faces at full aperture.

Landscape and architecture: a used DSLR is more than enough

Triod, ISO 100, zoomed live view, manual focus, long exposures. In this workflow, autofocus never touches the final file, and eye-detection is a feature you will never turn on. A Canon 6D at 450 euros produces the exact same file as an EOS RP at 600, with the advantage of an optical viewfinder that does not consume battery during the half-hours of waiting for the right light.

If you shoot landscapes and are considering a mirrorless, you are paying for features that your workflow does not use.

Sport, action and reportage: pay attention to buffer and battery life

Used entry-level full-frame mirrorless cameras have two limitations that are immediately noticeable in the field: a small buffer and low battery life. The Sony A7 at 400 euros is the most affordable entry into full-frame, but it locks up during long bursts and a single battery won't last until the end of the day. A used Nikon D750 or Canon 5D Mark III, with a DSLR battery and optical viewfinder, can handle a full day of shooting with two batteries in your pocket.

Video: no contest

Full frame DSLRs under 700 euros deliver mediocre video. Often limited to 1080p, with unusable continuous autofocus and no flat profile. If video is a key part of your work, mirrorless is not an option, it is a requirement.

With an exception we mention reluctantly, because it doesn't sell full frame: if you need only video, a Panasonic GH4 at 320 euros does more than any 6D. 4K, flat profiles, no 30-minute limit on long clips. It's Micro Four Thirds, not full frame, and in this case it's the right choice.

The mistakes we see most often in our store

Three mistakes account for the majority of returns and regrets. They are not sophisticated technical errors: they are errors in budget allocation and decision sequencing. Those switching to full frame tend to focus on the body because the body is what you read about in reviews, while the images are made by the glass in front and the habits of the one taking the shots.

Buy the body and postpone the lenses

It's the number one mistake and it has apparent logic: I buy the body now and add good lenses later. In practice, "later" means six months with the 24-105 f/4 kit and the feeling that the full frame doesn't live up to its promises. With f/4 on full frame, in a dimly lit interior, you end up shooting at ISO 6400 with shutter speeds on the verge of motion blur.

An APS-C body paired with a 35mm f/1.8 lens mounts an aperture that gathers over two stops more light. In that scenario, it takes better photos, period. Full frame only recovers the advantage when paired with a fast lens.

The budget allocation we recommend at the counter:

• 50% camera body, 50% lenses if you are starting from scratch and have a budget under 1,200 euros.
• 40% camera body, 60% lenses if you mainly shoot indoors, portraits, events, or concerts.
• A fast prime lens right away, not "later on": a used 50mm f/1.8 costs 100-150 euros and improves the result more than a 300 euro difference in the camera body.

Selling the entire APS-C kit before trying the new system

It happens often: you sell the entire kit to fund the upgrade, and two months later you realize you miss the weight, the compactness, or the performance of your old prime lenses. At that point, buying them back costs more than what you received, because you sold at private-party prices and are buying back at retail prices.

The practical advice is to keep the APS-C body for at least three months. It serves as a second body — truly useful when you don't want to change lenses in the field — and as insurance for your decision. People who switch back do exist and it's not rare: they are mostly travel and nature photographers who discover they have lost the crop factor advantage on telephoto lenses and two kilos of backpack weight.

Sell your APS-C lenses if you want: you won't use them again. Keep the camera body until you have completed an entire season with your new system.

Chasing megapixels

24 megapixels are enough to print 50x70 centimeters at 200 dpi, which is already beyond what 95% of our customers print in real life. The 45 megapixels serve two precise purposes: cropping aggressively on distant subjects and printing in large format. They are not needed for Instagram, a website, or a 30x30 album.

They cost more in three areas at once: the camera body, storage — files double in size and the computer needs an upgrade — and the lenses, because on a 45-megapixel sensor, a mediocre lens reveals all its limitations. Those who choose 24 megapixels and invest the difference in lenses take better photos. We see this every month.

The short answer, by starting profile

Whoever arrives at the counter with a bag already full makes a different choice than whoever arrives empty-handed. It is not a matter of taste: it is the value of the kit you have already paid for that determines which side is worth entering full-frame from.

Already have EF or F lenses? Start with a DSLR, consider an adapter later

If you have three or four EF or F lenses in good condition, the camera body is the least important part of the bill. A used Canon 6D or Nikon D750 costs between 450 and 700 euros and makes full use of what you already have right away, without adapters, without autofocus compromises, and without firmware limitations.

Switching to mirrorless with an adapter remains a viable option down the line, but it should be done only when you have a specific reason: eye-detection for portraits, an electronic viewfinder for studio flash, or in-body stabilization for video. Buying an RF or Z body today to use adapted EF or F lenses means paying for the future without actually using its advantages.

A separate case is for those seeking the ergonomics and burst rate of a professional body while spending little: there, the reasoning shifts to the top-tier models of the previous generation, as we explain in our in-depth guide on Used Nikon D3 and D3s.

Starting from scratch or coming from Sony APS-C: check out the mirrorless

Without a lens kit to save, you have nothing to defend, so it makes sense to enter the system that will have the most new lenses in the coming years. Those coming from APS-C Sony already have the E mount in-house: APS-C lenses work in crop mode and remain usable during the transition.

Two concrete entry points from our catalog:

• Sony A7 at 400 euros — the most affordable way to get a full-frame sensor with an E mount. Autofocus is slow by today's standards and the burst rate is modest, but image quality is excellent and access to the E-mount lens lineup is complete.
• Canon EOS RP between 520 and 600 euros — we have 7 units available. Lightweight camera body, Dual Pixel autofocus with eye-detection that actually works, and the EF-RF adapter opens up the entire used Canon lens lineup at DSLR prices.

Summary

A note that applies to all four profiles: the budget indicated is for the body only. Before signing, add up the lenses you will actually need over the next twelve months, as that is where the real spending is determined.

Frequently asked questions

Want advice on your specific case before buying?

If you have doubts about a purchase or need advice for your specific case, contact us. We offer free advice because we are photographers first, and because a customer who makes a poor purchase does not 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)

And if you want to see what we have in stock right away, explore the available used gear 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 refer to the time of publication.