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R5 Mark II vs. R6 Mark III

  
 
Toothwalker
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p.5 #1 · R5 Mark II vs. R6 Mark III


BrandonSi wrote:
That's a really unfortunate experience, I hope you got your money back?


I chose the option to pay at delivery. Since it was never delivered I never paid. The annoyance is just the waiting time and silent cancellation.


I think the cropping consideration is probably something people over-analyze. "Most" people are just targeting online for display purposes where even a significant crop on a 24MP sensor still results in enough resolution for online display. I've also printed out 17x22 (A4, I think) images from a 16MP sensor and it looked great.


Yes, 24 Mpx leaves ample room for cropping if you are targeting social media, and I have 50x75 cm prints from the 21 Mpx 5DII which leave nothing to be desired. It is enough for most shooting, but not all shooting.


artsupreme wrote:
A couple things as it seems you might be contradicting yourself. First, I don't believe the R6II is far better than R5II at high ISOs. It's definitely better at native resolution, but I wouldn't call it far better considering the resolution. When you downsample the R5II to the same resolution the difference is negligible, especially if downsampling for the web which you say is your intended use for most people. I've seen some say the R5II is actually better when downsampled, but either way we are just splitting hairs and I would call it a wash.

R6II is a more flexible
...Show more

No doubt the R5II is the more capable camera overall, but it is not better in every department. I downloaded some high-ISO R5, R5II, and R6II files from the dpreview studio scene. I downsampled the R5 and R5II shots to the R6II resolution, and the R5II had clearly more noise than the R5 and R6II, which were very similar. (Judged from the raw files, without any additional noise reduction.) Time will tell, but I expect the R6III to perform similarly to the R5 and the R6II. And for what it is worth, I have heard reviewers claim that the R6III has a larger buffer than the R5II. I don't know how they measured it, or what the official Canon specs say.

I wonder how the R6III will behave in the cold, because I have seen numerous reports on problems with the R5II at subzero temperatures. Not ideal for a Norwegian winter.






Nov 24, 2025 at 05:04 PM
Z250SA
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p.5 #2 · R5 Mark II vs. R6 Mark III


This is not just for JohnDizzo. Your comprehensive list is what we discuss.

JohnDizzo15 wrote:
There are a few statements of fact where opinions play no role.

-the R6iii sensor readout speed is less than half the speed of the R5ii
-R6iii only has one processor for the entire lift
-R5ii has two processors to help with resource intense functions like readout speed and AF algorithm processing
-R6iii is capped at 12 bit raw file capture in ES
-R5ii does 14 bit raw in all modes except for compressed raw
-R6iii has identical specs for both the EVF and rear LCD as the R6mk1
-sensor readout speed and processing power are the two primary factors determining AF speed and general
...Show more

Ok, so this is a gear forum, Canon at that. But the facts? Yes, of course the list is correct, the fact. But how often do those differences in hardware show up in the final image? How large would you have to print (if print is the end product, for me it is not), how close do you have to stand, how good has the monitor have to be, how deep do you have to peep, to even notice any difference? Unless comparing side by side, could anyone even tell?

12 vs 14 bit, I in reality there is not much difference there. There is some, but the importance is mostly if not always minute and/or unimportant. CRAW vs RAW? About equally minute. Resolution is far more important IMHO, yes, humble opinion because of YMMV.

Comparing a low used price to the full price of a new product is just too much sugar coating for my taste. Come on. Most of us have been early adopters at some point. There is a punishment and a joy in it and economically always foolish (unless the new gadget brings something revolutionary to Your bread-getting toolbox).

Yes, the R52 is a powerhouse! I got mine just as my season ended (unexplicably low price from main distributor), so I´ve not had that many good field-days. The AF is a real step up for sure, which is my main reason to get one. But, and this is important to me: I get very good results with the R10 and the RF 100-400 too. I just have to do my part better, get closer, better light, you know. And in the context of this thread: In the heat of the moment, e.g. BIF, I do not notice the rather huge difference in the VF. It may hamper me. But I do not notice it unless I shoot the R52 and R10 or for that matter my R5 in parallell, then the difference is huge.

Final point being that those listed benefits of the R52 over the R63 are mainly, mostly barely, visible in a side by side comparison. If you have "just" the R63, or R62 for that matter, I suspect most would be equally satisfied with the end result. And you still have to do your part, the craft.



Nov 24, 2025 at 05:21 PM
JohnDizzo15
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p.5 #3 · R5 Mark II vs. R6 Mark III


Z250SA wrote:
This is not just for JohnDizzo. Your comprehensive list is what we discuss.

Ok, so this is a gear forum, Canon at that. But the facts? Yes, of course the list is correct, the fact. But how often do those differences in hardware show up in the final image? How large would you have to print (if print is the end product, for me it is not), how close do you have to stand, how good has the monitor have to be, how deep do you have to peep, to even notice any difference? Unless comparing side by side, could anyone
...Show more

That's the beauty of hashing these conversations out. By in large, you and I are in agreement.

Personally, I generally agree with you on 12 vs 14 bit, as for 90% of users, they'll never see the difference. For those of us that push files pretty hard in post at times, it will absolutely make a difference (just like the resolution difference). That being said, the difference exists and it is an exclusion from the new shiny body.

With regard to price comparisons, I compare what is reality at the time of comparison. The reality is, the R5ii has been out for a good while and can be had at a significant discount. The R6iii, by no fault of its own, is going to be retail for a bit. These are just the facts of the market. Accordingly, I accept that this conversation regarding price will be different 6 months from now.

Regarding your point on the EVF, I also agree that for most users, it won't make much of a tangible difference. But as stated in my previous post, that misses the point. The fact of the matter is, the R6iii is sharing specs with its two previous iterations and is being sold as the new shiny body for $2799.

With regard to your comment on AF, I also agree as it is a huge factor for me. The R5ii absolutely has hardware that creates a huge disparity for the R6iii which isn't something to be ignored.

I also agree, the end result is what matters. But if that were what we were discussing here, then the conversation would be very different. This is a discussion regarding the bleeding edge tech that Canon has to offer. As such, the facts of the hardware differences absolutely matter. Furthermore, all of us could be doing just fine with the camera we had 10 years ago. But again, missing the point.

The R6iii will be an amazing camera for anyone aspiring to get one. That doesn't make it comparable to the R5ii with regard to the things I've stated previously though. It is not on par with regard to AF performance, speed, ES, raw file data, etc.



Nov 24, 2025 at 06:16 PM
DougVaughn
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p.5 #4 · R5 Mark II vs. R6 Mark III


All the bickering aside, I received a notification from B&H this morning that my R6III will arrive on Wednesday. Awesome, except that my wife decided she wanted one also to replace her original R6, so I need to order a second one to ensure a happy household.



Nov 24, 2025 at 06:32 PM
JohnDizzo15
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p.5 #5 · R5 Mark II vs. R6 Mark III


I’ll make it simpler.

The OP title says it all.

With regard to the other part of the conversation some are reverting back to, namely, “R6iii is plenty good,” I’m sure it will be. That’s not the OP discussion though. That said…

R6iii hardware boosts over R6ii:

-9mp resolution increase
-roughly 10% increase in sensor readout speed
-new card slot configuration

Hardware similarities:

-EVF (same as original R6)
-LCD (same as original R6)
-Digic X processor (same as R6ii)

As a matter of opinion on my part, this is not a compelling upgrade to the R6ii at $2799, and I accept that others have an equally valid opinion should they decide the upgrades are worth it to them.



Nov 24, 2025 at 06:49 PM
artsupreme
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p.5 #6 · R5 Mark II vs. R6 Mark III


Toothwalker wrote:
No doubt the R5II is the more capable camera overall, but it is not better in every department. I downloaded some high-ISO R5, R5II, and R6II files from the dpreview studio scene. I downsampled the R5 and R5II shots to the R6II resolution, and the R5II had clearly more noise than the R5 and R6II, which were very similar. (Judged from the raw files, without any additional noise reduction.) Time will tell, but I expect the R6III to perform similarly to the R5 and the R6II. And for what it is worth, I have heard reviewers claim that the R6III
...Show more

I've seen comparisons done many times done all over the inter webs, and yes the R5II will have more noise at native resolution at 100% due to the stacked sensor but when downsampling and processing it's going to be a wash. In fact you should be able to pull more detail out of the R5II IF processed properly. Even if you see more noise in the R5II after downsampling at 100%, the files should look pretty close, definitely not far worse, and then you process them...... BTW this noise comparison is pretty much non applicable if you are downsizing for web viewing as Brandon says "most people" do anyway.

Here's a quote from TDP where they list all of the spec advantages of the R5II in case anyone wants to learn what some of us already know:

Here are the R6 II's advantages:

Up to ISO 102400 and 204800 vs. 51200 and 102400 (at the same ISO settings, the R6 II will have less noise when viewed at the pixel level. However, the R5 II image properly downsampled to 24 MP should appear similarly clean. The highest ISO settings are unusable) [/I]

https://www.the-digital-picture.com/News/Should-I-Get-the-Canon-EOS-R5-Mark-II-or-the-EOS-R6-Mark-II

As already mentioned, we are in a gear forum comparing two cameras which means even if splitting hairs, all feature comparisons are relevant. Otherwise, like John said, we can all just go back to using our DSLR's from 10 years ago because they are "good enough" and ultimately produce nearly the same end result as our modern cameras do, other than crazy high ISO shots. Which by the way, if someone is on a limited budget and they are looking at price to performance, they should not be looking at any of these new cameras listed here, but rather on old DSLR bodies with good glass.



Nov 24, 2025 at 07:09 PM
JohnDizzo15
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p.5 #7 · R5 Mark II vs. R6 Mark III


This conversation also reminds me of an internal debate I had on the Sony side of the house. I wanted an A1ii, and was then presented with a solid deal for an A7RV about a year ago.

I thought to myself after reading up on everything, that the A7RV is the vast majority of what I wanted out of my next Sony body (high res, near top tier AF, multi-directional LCD, high res EVF, fast dual card slots, etc). Many were exclaiming that the new AI chip/co-processor was a huge boost. While it was definitely a boost from previous R models, it was not the boost I was wanting or hoping for as alas, a non-stacked sensor is always going to be a non-stacked sensor. So instead, I’ve since satiated my need for a high res stacked sensor body with Canon.

As stated in my prior post, my original A9 from over 8 years ago still does a better job at certain tasks than all of my current Sony non-stacked sensor bodies. This is not to say though, that the current bodies don’t do other things better than my old A9 though.



Nov 24, 2025 at 07:44 PM
rscheffler
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p.5 #8 · R5 Mark II vs. R6 Mark III


After having used the R1 for a couple football games and this past weekend went back to an R5II, I agree that a fast sensor makes a significant difference. The R1 certainly analyzes and drives AF faster and more confidently at initial acquisition than the R5II, to the point now where it is bothering me going back to the R5II.

Toothwalker wrote:
And for what it is worth, I have heard reviewers claim that the R6III has a larger buffer than the R5II. I don't know how they measured it, or what the official Canon specs say.


It's listed in the R6III manual that can now be downloaded, and it caught my eye because it's noticeably more than the R6II (140 CRAW) and also somewhat more than the R5II (170 CRAW). I run into buffer issues with the R6II at 40 fps very frequently. 30 fps with the R5II's somewhat larger buffer is better but I sill hit the limit. R6III in CRAW is apparently around 280 frames, which is a 7-second burst vs. about 3 with the R6II - depending on the ISO.




Nov 25, 2025 at 02:59 AM
Z250SA
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p.5 #9 · R5 Mark II vs. R6 Mark III


Yes, buffer size is far more of a hammer-in-head thing than any subtle diff in noice or 12 vs 14 bit. Then again, when you find yourself with many 10k´s of images to cull... Bam!


Nov 25, 2025 at 08:56 AM
JohnDizzo15
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p.5 #10 · R5 Mark II vs. R6 Mark III


Interesting trade-off proposition for some to consider here.

Is being able to get 110 additional compressed raws buffered over the R5ii’s buffer (170 vs 280) in exchange for having 66% of the R5ii’s AF calculations per second worth the exchange?

I could definitely understand why one would want a deeper buffer if they’re needing to shooting 40 FPS for as many consecutive seconds as possible. Personally though, the extra 1/3 (+20) in AF calculations per second (60 vs 40) is going to be of more value to me, as that affects every type of shooting (including lower FPS modes) and not just when 40 FPS consecutive bursts are needed for as long as possible. Certainly YMMV though.



Nov 25, 2025 at 04:33 PM
 


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EB-1
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p.5 #11 · R5 Mark II vs. R6 Mark III


JohnDizzo15 wrote:
Interesting trade-off proposition for some to consider here.

Is being able to get 110 additional compressed raws buffered over the R5ii’s buffer (170 vs 280) in exchange for having 66% of the R5ii’s AF calculations per second worth the exchange?

I could definitely understand why one would want a deeper buffer if they’re needing to shooting 40 FPS for as many consecutive seconds as possible. Personally though, the extra 1/3 (+20) in AF calculations per second (60 vs 40) is going to be of more value to me, as that affects every type of shooting (including lower FPS modes) and
...Show more

What is the source for the ratio of the AF calculations?

EBH



Nov 25, 2025 at 05:09 PM
JohnDizzo15
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p.5 #12 · R5 Mark II vs. R6 Mark III


EB-1 wrote:
What is the source for the ratio of the AF calculations?

EBH


Google AI overview. It’s from one of the linked articles in the data Google pulled with search terms “autofocus calculations per second canon r6iii.” Swap out body names for the R5ii accordingly. The R5ii is equal to the R3 in this regard (60 AF calculations/second).



Nov 25, 2025 at 05:21 PM
mrdan86
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p.5 #13 · R5 Mark II vs. R6 Mark III




JohnDizzo15 wrote:
Google AI overview. It’s from one of the linked articles in the data Google pulled with search terms “autofocus calculations per second canon r6iii.” Swap out body names for the R5ii accordingly. The R5ii is equal to the R3 in this regard (60 AF calculations/second).


Which linked article?



Nov 25, 2025 at 06:17 PM
EB-1
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p.5 #14 · R5 Mark II vs. R6 Mark III


I'm only seeing that the R5 II can do "up to 60" AF calculations per second at 30FPS and that the R6 III can AF at 40 FPS. It's not clear how many calculations there are if both are going at 20FPS for example. I know that the R5 II takes more than one cycle to actuate the AF motors, so exactly how much difference it makes remains to be seen. If best AF is needed then you go for the R1. Because the R6 III is new the pricks are high and there are no used ones, but there will be plenty of used ones by next summer. The used R5 IIs will be noticeably more expensive than used R6 IIIs.

EBH



Nov 25, 2025 at 11:47 PM
JohnDizzo15
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p.5 #15 · R5 Mark II vs. R6 Mark III


mrdan86 wrote:
Which linked article?


Not sure which one it pulled from. But this is what I was seeing. There's also a row of different links if you scroll down from there.

Untitled by John Dizzo, on Flickr

EB-1 wrote:
I'm only seeing that the R5 II can do "up to 60" AF calculations per second at 30FPS and that the R6 III can AF at 40 FPS. It's not clear how many calculations there are if both are going at 20FPS for example. I know that the R5 II takes more than one cycle to actuate the AF motors, so exactly how much difference it makes remains to be seen. If best AF is needed then you go for the R1. Because the R6 III is new the pricks are high and there are no used ones, but there
...Show more
Agreed on the point regarding the R1. However, the happy compromise if you want higher resolution is the R5ii. If I want absolute fastest everything without consideration for resolution though, I'd go with an A9iii back on the Sony side. As it stands, the R5ii is my happy compromise to satiate my desire for a high res, stacked sensor body that is fast enough for my uses.



Nov 26, 2025 at 12:43 AM
EB-1
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p.5 #16 · R5 Mark II vs. R6 Mark III


That doesn't help much since I get different results on the Google for the R6 III than you do, and next week we might get a different answer. I would need to see a reference to a Canon article to understand the cycle times over the range of FPS. Most of the time I used the R5 in MS mode at 12FPS and then the R5 II at 20/30FPS in ES mode. The R5 II AF is better than AF of the R5, but the AF results at 60 calcs/sec. are not 5 times better than the R5 at 12 calcs/sec.
Since the R6 III is shipping already we just need to see how it actually performs. I would expect it to be less than the R5 II but still very good. I'm somehow hoping that the IQ is better than the R5 II with it's baked in NR.

EBH



Nov 26, 2025 at 07:18 AM
Z250SA
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p.5 #17 · R5 Mark II vs. R6 Mark III


The pile that AI compiles from whatever it pulls it from is about as reliable as the ones around here who read the coming winters weather from the colour of the fins of Perches... Should be AO instead of AI: Amusement Only.


Nov 26, 2025 at 07:20 AM
Toothwalker
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p.5 #18 · R5 Mark II vs. R6 Mark III


artsupreme wrote:
I've seen comparisons done many times done all over the inter webs, and yes the R5II will have more noise at native resolution at 100% due to the stacked sensor but when downsampling and processing it's going to be a wash. In fact you should be able to pull more detail out of the R5II IF processed properly. Even if you see more noise in the R5II after downsampling at 100%, the files should look pretty close, definitely not far worse, and then you process them......
BTW this noise comparison is pretty much non applicable if you are downsizing for
...Show more

Sure, noise is pretty much a non-issue for web display and the same goes for sensor resolution. I hope you are not referring to AI noise reduction when you write "and then you process them", because that has nothing to do with photography.


Here's a quote from TDP where they list all of the spec advantages of the R5II in case anyone wants to learn what some of us already know:

Here are the R6 II's advantages:

Up to ISO 102400 and 204800 vs. 51200 and 102400 (at the same ISO settings, the R6 II will have less noise when viewed at the pixel level. However, the R5 II image properly downsampled to 24 MP should appear similarly clean. The highest ISO settings are unusable) [/I]

https://www.the-digital-picture.com/News/Should-I-Get-the-Canon-EOS-R5-Mark-II-or-the-EOS-R6-Mark-II


His assumption is correct for sensors with different resolutions but otherwise the same sensor technology. This is not the case here. I believe it is pretty well established that stacked sensors take a small hit in image quality compared with their non-stacked counterparts.


As already mentioned, we are in a gear forum comparing two cameras which means even if splitting hairs, all feature comparisons are relevant. Otherwise, like John said, we can all just go back to using our DSLR's from 10 years ago because they are "good enough" and ultimately produce nearly the same end result as our modern cameras do, other than crazy high ISO shots. Which by the way, if someone is on a limited budget and they are looking at price to performance, they should not be looking at any of these new cameras listed here, but rather on old
...Show more

No disagreement here. I am just saying that while the R5II is the more capable camera overall, it is not the best in all departments. Even if that includes a hair-splitting noise comparison.




Nov 26, 2025 at 03:11 PM
aCuria
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p.5 #19 · R5 Mark II vs. R6 Mark III


JohnDizzo15 wrote

That's the beauty of hashing these conversations out. By in large, you and I are in agreement.

Personally, I generally agree with you on 12 vs 14 bit, as for 90% of users, they'll never see the difference. For those of us that push files pretty hard in post at times, it will absolutely make a difference (just like the resolution difference). That being said, the difference exists and it is an exclusion from the new shiny body.

With regard to price comparisons, I compare what is reality at the time of comparison. The reality is, the R5ii has been out
...Show more


JohnDizzo15 wrote
Personally, I generally agree with you on 12 vs 14 bit, as for 90% of users, they'll never see the difference.


People often claim that bit depth is overrated and that 12-bit looks the same as 14-bit. This idea only holds true for cameras that cannot produce a clean enough signal to fill 14 bits in the first place. If a sensor delivers only 12 bits of usable information, the remaining bits simply record noise.

Cameras like Hasselblad's show the real value of greater bit depth. Their 16-bit files reveal smoother skin tones, cleaner shadows, and more natural transitions because the sensor actually produces more than 14 bits of meaningful data.

14 bits is not useless. Its just that not every sensor just can take advantage of it. The best sensors prove that higher bit depth does matter when the hardware is capable of delivering the signal quality to match.




Dec 08, 2025 at 08:26 AM
aCuria
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p.5 #20 · R5 Mark II vs. R6 Mark III


JohnDizzo15 wrote:
Interesting trade-off proposition for some to consider here.

Is being able to get 110 additional compressed raws buffered over the R5ii’s buffer (170 vs 280) in exchange for having 66% of the R5ii’s AF calculations per second worth the exchange?

I could definitely understand why one would want a deeper buffer if they’re needing to shooting 40 FPS for as many consecutive seconds as possible. Personally though, the extra 1/3 (+20) in AF calculations per second (60 vs 40) is going to be of more value to me, as that affects every type of shooting (including lower FPS modes) and
...Show more

JohnDizzo15 wrote:
Is being able to get 110 additional compressed raws buffered over the R5ii’s buffer (170 vs 280) in exchange for having 66% of the R5ii’s AF calculations per second worth the exchange?


The R5 II’s long-burst performance is limited not just by buffer size but also by its storage layout.

At 30 fps, the camera prioritizes filling the internal buffer and delays writing to the card, causing a major slowdown once the buffer fills. This means that although it can hit its headline burst rate for a couple of seconds, sustained shooting drops sharply as the camera struggles to clear data.

The situation is made worse by the fact that the R5 II has only one CFExpress slot. If you record to both slots for redundancy (CFExpress + SD), the card-writing pipeline becomes bottlenecked by the slower SD card, further reducing sustained throughput. In long bursts, this results in fewer total frames captured compared to competing cameras that either write continuously during bursts and/or have dual high-speed slots.

I wonder if the R6iii also prioritizes filling the internal buffer and delays writing to the card



Dec 08, 2025 at 09:45 AM
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