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Re - would you buy 39mpx, 5ms read, 30fps, CFEx
I have R6 family, R Apsc Family, or non Canon and I would buy at $2,500 USD
Same as 1, but I would only buy if <$200OUSD
I have R5, R1, R3 FF family, and I would buy at $2,500 US
Same as 3, but I would only buy if <$2000 USD
I would not buy

Re - would you buy 39mpx, 5ms read, 30fps, CFEx

  
 
aCuria
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p.2 #1 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


ilkka_nissila wrote:
There is no sharp boundary beyond which increasing the pixel count produces no improvement in image quality. Diffraction does reduce the MTF at mid to small apertures, but it's still possible to get some improvement by increasing the pixel count. Increasing the pixel count might increase the noise (certainly it does so at the pixel level, but not necessarily at the image level) and this will in practice limit the detail that can be obtained, but in bright light there should still be good detail at f/8 and while f/11 would be less sharp than f/8 it would probably still
...Show more

While there isn’t a perfectly sharp cutoff in practice, because real images depend on light wavelength, sampling efficiency, and system transfer functions, there is a hard upper bound on resolution set by physics. The Rayleigh criterion defines the maximum resolving power of a lens with a circular aperture at a given f-number. This limit is often expressed in lp/mm, but it can just as well be translated into an equivalent megapixel ceiling.

A better analogy may be:

Imagine capturing an image using the best possible full-frame or larger format sensor under ideal studio conditions, then down-sampling it to 17.5 MP. Lets call this our “ground truth” reference.

Now take an APS-C camera with 39 MP, or hypothetically 100 MP. At f/7.1 or smaller this camera simply cannot resolve more detail than that 17.5 MP “ground truth” reference because of diffraction. Extra pixel count won’t recover information that the optics never delivered in the first place.



Apr 13, 2026 at 09:22 PM
ilkka_nissila
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p.2 #2 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


aCuria wrote:
While there isn’t a perfectly sharp cutoff in practice, because real images depend on light wavelength, sampling efficiency, and system transfer functions, there is a hard upper bound on resolution set by physics. The Rayleigh criterion defines the maximum resolving power of a lens with a circular aperture at a given f-number. This limit is often expressed in lp/mm, but it can just as well be translated into an equivalent megapixel ceiling.

A better analogy may be:

Imagine capturing an image using the best possible full-frame or larger format sensor under ideal studio conditions, then down-sampling it to 17.5 MP. Lets call
...Show more

While I agree there are practical limitations to resolution determined by diffraction, I believe your analysis is incorrect on the specifics. You need to consider the case of spatial frequencies with different colors (for example luminosity might not change spatially but color might) and the Bayer sensor array has a more sparse set of red and blue filtered photosites, and also consider spatial frequencies in 45 degree diagonal direction. To have no improvement in color detail there should be at least 8*sqrt(2) photosite pitches per spatial frequency cycle (sqrt(2) comes from diagonal direction, a factor of three or four is needed to correctly sample a frequency because there are some phases where the two samples dictated by Nyquist would lead to zero contrast, and a factor of two comes from the Bayer array 2x2 matrix, totalling 8*sqrt(2)).

If you look at test shots made by the digital picture com, e.g. the 135/1.8 on a Sony A7RIV,

https://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx?Lens=1421&Camera=1442&Sample=0&FLI=0&API=7&LensComp=0&CameraComp=0&SampleComp=0&FLIComp=0&APIComp=0

If you select aperture f/16 you can still see a ton of moire in the center of the image, suggesting the camera has inadequate density of photosites to render the image correctly even at the aperture considerably blurred by diffraction at f/16. The sensor resolution must be increased considerably (beyond the 61 MP FF, equivalent to 23 MP 1.6x crop) before we can expect color correct fine detail to be rendered in our images, assuming a tripod and stationary subject at low ISO. At f/7.1 the issue is obviously all the more pertinent. The 400/2.8 similarly shows moire at f/16 on a 50-megapixel camera (61 MP not shown by this tool). Only when moire completely disappears is the image true to the subject.

In practical shooting situations, low light, noise, and subject movement blur reduces the system resolution and in practice in many cases those gains beyond let's say 45 MP full-frame might not be realized except for static subjects in bright lighting conditions, but it's totally possible that in some practical situations moire does show up. I tend to avoid the sweet spot apertures and shoot either near wide open (f/1.4 to f/2.8) or well stopped down (f/11), to avoid these problems. However, when I was shooting with the Nikon 500 PF which is a very high resolution lens with minimal CA, at f/5.6 I was getting erroneous bird color detail a lot of the time on 45 MP sensors. To get correct rendering of the subject in those circumstanecs, the pixel count must be increased since stopping down would introduce noise (due to practical lighting conditions that I had). Stopping down does effectively help mitigate moire and this is a benefit of diffraction helping out the photographer. When using studio lighting, stopping down can be achieved without introducing noise.



Apr 14, 2026 at 03:59 AM
EB-1
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p.2 #3 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


aCuria wrote:
While there isn’t a perfectly sharp cutoff in practice, because real images depend on light wavelength, sampling efficiency, and system transfer functions, there is a hard upper bound on resolution set by physics. The Rayleigh criterion defines the maximum resolving power of a lens with a circular aperture at a given f-number. This limit is often expressed in lp/mm, but it can just as well be translated into an equivalent megapixel ceiling.

A better analogy may be:

Imagine capturing an image using the best possible full-frame or larger format sensor under ideal studio conditions, then down-sampling it to 17.5 MP. Lets call
...Show more

The R7/90D resolves better and produces better images than any of the 18-20MP Canon cropper cameras. Perhaps if you downsample perfectly from a 100MP image to 18MP it is is different, but with the CFA, AA, and noise it's better to have more pixels than strictly necessary. The R7 has only 8MP each of red and blue for example. Most of the issues people have with the R7 are not about not having enough pixels, but the slow sensor read, shutter shock, and lack of CFe.

EBH



Apr 14, 2026 at 07:27 AM
Steve Spencer
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p.2 #4 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


aCuria wrote:
While there isn’t a perfectly sharp cutoff in practice, because real images depend on light wavelength, sampling efficiency, and system transfer functions, there is a hard upper bound on resolution set by physics. The Rayleigh criterion defines the maximum resolving power of a lens with a circular aperture at a given f-number. This limit is often expressed in lp/mm, but it can just as well be translated into an equivalent megapixel ceiling.

A better analogy may be:

Imagine capturing an image using the best possible full-frame or larger format sensor under ideal studio conditions, then down-sampling it to 17.5 MP. Lets call
...Show more

Higher resolution does have diminishing returns but it does have returns and downsizing to a smaller number of pixels is always an option. After using a lot of cameras with ever increasing pixel density over the years, a higher pixel density sensor has never looked worse at the same number of pixels than a lower density sensor. So, although the advantages of higher pixel density may not be very large, higher pixel density in my experience never makes images worse.

Now with the R7 II if it goes from 33 MP to 39 MP, then I don't think that will improve images really at all. It is a small increse in pixel density and with such a high pixel density already in the R7 we are well into diminishing returns so I see very little value for me personally in increasing the pixel density to 39 MP. That doesn't mean Canon won't do it and it does let them compete better with the Fuji 40 MP sensor cameras--although I think making the sensor at least 40 MP would be better to at least match that number 40 MP number for marketing purposes--I don't think it will really matter for what the camera offers.

Personally, I would rather they went with a 24 MP stacked BSI sensor than a 40 MP FSI non-stacked sensor camera. I would be more interested in that camera.

With regard to using the camera for wildlife shooting I think if Canon wants to offer that option, they need lenses that work well with the camera as well. Rather than a 200-800 f/6.3-9, they need something with a faster aperture that isn't quite as long. Something like Fuji's (or Sigma's) 500 f/5.6 would be a great 800 f/9 equivalent with a Canon R7 II. Perhaps a zoom would be better instead. Again the RF 100-400 f/5.6-8 has a pretty slow aperture for an APS-C camera. Instead something like a 150-450 f/4.5-6.3 would be a much better lens for an R7 II targeted for wildlife shooters.

All of Canon's less expensive long lenses seem to me to be much more designed for full frame cameras than an APS-C camera, so in my view it would be a step in a very different direction if Canon made an R7 II that was targetted at wildlife shooters.



Apr 14, 2026 at 08:27 AM
EB-1
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p.2 #5 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


Steve Spencer wrote:
Personally, I would rather they went with a 24 MP stacked BSI sensor than a 40 MP FSI non-stacked sensor camera. I would be more interested in that camera.

With regard to using the camera for wildlife shooting I think if Canon wants to offer that option, they need lenses that work well with the camera as well. Rather than a 200-800 f/6.3-9, they need something with a faster aperture that isn't quite as long. Something like Fuji's (or Sigma's) 500 f/5.6 would be a great 800 f/9 equivalent with a Canon R7 II. Perhaps a zoom would be
...Show more

The 7D II was very popular for wildlife and the R7 is to a lesser degree. The R7 II should be more popular if it has a good read speed. Regardless of the pixel count the R7 series is the best Canon will make for a cropper and it is doubtful that will be changing. I'm sure that some will want fewer MP, but the Canon 24MP croppers are devoid of features many want and as cheaper cameras the read speeds will be slower which is worse for video and action.

EBH



Apr 14, 2026 at 09:20 AM
Steve Spencer
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p.2 #6 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


EB-1 wrote:
The 7D II was very popular for wildlife and the R7 is to a lesser degree. The R7 II should be more popular if it has a good read speed. Regardless of the pixel count the R7 series is the best Canon will make for a cropper and it is doubtful that will be changing. I'm sure that some will want fewer MP, but the Canon 24MP croppers are devoid of features many want and as cheaper cameras the read speeds will be slower which is worse for video and action.

EBH


Yes, it is certainly true the 7D II was popular for wildlife, but Canon has gone a very different direction as they introduced mirrorless cameras. They have brought out several inexpensive long lenses, but all of them are clearly designed for full frame cameras. They also have basically brought out only very inexpensive, slow and short focal length APS-C lenses. It is hard to mistake Canon's clear movement to APS-C as only a lower end product. The R7 is the high end of that low end product class, but I don't think that means it is going to get great tech. It is a quite capable camera and a real alternative for some shooters--me included as I bought one--but it is hard to mistake that Canon is positioning this camera below the R6 III in pretty much every meaningful way except pixel density and total resolution. I think the R7 II will stay there, but hey that is just my guess. I could be and I hope that I am wrong. We will know in a couple of months.



Apr 14, 2026 at 10:10 AM
EB-1
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p.2 #7 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


So you are seeing the 7 series to be used with low end teles? I doubt it will get a lot from the 200-800 that is weak at FF 45MP anyways. I'm seeing 7 series as what you do when the big teles are not enough or for certain weight/size issues. I'd rather have an 80MP FF body of course on the 600/4 with an internal TC and crop if needed.

It is strange that Canon appeared to be going into the slow, low IQ teles and cheap FF bodies before they really started the RF-s in earnest. Maybe they changed marketing plans now.

EBH



Apr 14, 2026 at 10:18 AM
Steve Spencer
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p.2 #8 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


EB-1 wrote:
So you are seeing the 7 series to be used with low end teles? I doubt it will get a lot from the 200-800 that is weak at FF 45MP anyways. I'm seeing 7 series as what you do when the big teles are not enough or for certain weight/size issues. I'd rather have an 80MP FF body of course on the 600/4 with an internal TC and crop if needed.

It is strange that Canon appeared to be going into the slow, low IQ teles and cheap FF bodies before they really started the RF-s in earnest. Maybe they
...Show more

I see the high end in RF being the 400 f/2.8L, the 600 f/4L, and the 800 f/5.6L. Those used on a moderately high pixel density FF body (i.e., the R5 II) is the high end for wildlife photography. You select the lens that give you the reach you need.

If you can't afford that, and let's face it most of us can't, then I think Canon's solution has been stil the R5 II body with lenses like the 100-500L if it is long enough and the 200-800 if it isn't. There is of course the long running rumor of a 300-600L which may or may not be an option in this class depending on what it turns out to be.

If you want to use the R7 what do you use it with? IMO, the 100-500L and the especially the 200-800 have too slow of an aperture at the long end to be useful with the R7 as you are well into taking a heavy hit with diffraction if you use that camera with these lenses and if you are going to use one of the big whites, why wouldn't you just get the R5 II as the difference between the R7 and the R5 II is peanuts compared to the cost of those lenses.

So, I don't really think there are any appropriate lenses in RF for the R7 to shoot wildlife. That tells me a lot, I think, about what the R7 II will and will not be. Unfortunately, I think it won't be a camera designed for wildlife. Again I could easily be wrong and I hope I am.



Apr 14, 2026 at 10:38 AM
Scott Stoness
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p.2 #9 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


aCuria wrote:
When you are asking for 39MP on APSC for $2500, you probably presume that such a camera will produce a higher quality image than the R6ii / R6iii ($2700) at 24MP FF

However AFAIK the 24MP FF is going to out-do the 39MP APSC in real life shooting conditions.

Think about it this way, even a "perfect" lens at f/7.1 or darker is unable to produce 45MP of resolution (FF) or 17.5MP (APSC) because diffraction has already set in on such a sensor at f/6.6!

This means, even if you have that 39MP apsc sensor, at f/7.1 you cant record more than
...Show more

You are right that if you are using a f7.1 lens, 39mpx is likely equivalent to 24mpx, because 39mpx sensor defracts starting at f4.

However, if you are using a 24mpx body and cropping to the equivalent of r7ii, you are likely in the 14mpx effective range, not 24mpx. And a cropped 14mpx, will likely have less dynamic range than an uncropped r7II.

Further, if you are using eg 600/f4 that outresolves the sensor, the sensor defraction is not relavant. Eg 39mpx is 39mpx.

39mpx apsc has its place. It is better (lower fstop) than R6III with a good lens with 1.4x; and better (39mpx) than R5ii with an f4 lens cropped (17mpx).



Apr 14, 2026 at 11:19 PM
aCuria
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p.2 #10 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


ilkka_nissila wrote:
While I agree there are practical limitations to resolution determined by diffraction, I believe your analysis is incorrect on the specifics. You need to consider the case of spatial frequencies with different colors (for example luminosity might not change spatially but color might) and the Bayer sensor array has a more sparse set of red and blue filtered photosites, and also consider spatial frequencies in 45 degree diagonal direction. To have no improvement in color detail there should be at least 8*sqrt(2) photosite pitches per spatial frequency cycle (sqrt(2) comes from diagonal direction, a factor of three or four is
...Show more

The f/7.1 lens will resolve less than 17.5MP (apsc) or 45MP (FF) of luminance data.

Its true that if the sensor resolution exceeds lens resolution then luminance moire is suppressed.

However this does not mean you wont see color moire. This is caused by the bayer pattern and associated non-uniform color sampling, interpolation and demosaicing.

I do think the next breakthrough in sensors would be a miniaturized 3CCD, or advanced Foveon type sensor. This would solve both color moire, and potentially improve iso sensitivity by at least 1 stop since green light is not thrown away at the red and blue photosites and vice versa.

If you try using 4 way pixel shift, which simulates the foveon sensor, you will find that the color moire is suppressed even though MP count did not increase.

Edited on Apr 15, 2026 at 02:54 AM · View previous versions



Apr 14, 2026 at 11:49 PM
 


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aCuria
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p.2 #11 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


Scott Stoness wrote:
You are right that if you are using a f7.1 lens, 39mpx is likely equivalent to 24mpx, because 39mpx sensor defracts starting at f4.

However, if you are using a 24mpx body and cropping to the equivalent of r7ii, you are likely in the 14mpx effective range, not 24mpx. And a cropped 14mpx, will likely have less dynamic range than an uncropped r7II.

Further, if you are using eg 600/f4 that outresolves the sensor, the sensor defraction is not relavant. Eg 39mpx is 39mpx.

39mpx apsc has its place. It is better (lower fstop) than R6III with a good
...Show more


Scott Stoness wrote:
However, if you are using a 24mpx body and cropping to the equivalent of r7ii, you are likely in the 14mpx effective range, not 24mpx. And a cropped 14mpx, will likely have less dynamic range than an uncropped r7II.


Well, simply use a more suitable lens for the 24MP FF body, that way you don't need to crop.

Scott Stoness wrote:
Further, if you are using eg 600/f4 that outresolves the sensor, the sensor defraction is not relavant.


Theoretically yes, but practically its still no. So far zero camera lenses I have seen perform well enough to be called diffraction limited at the brighter apertures. They are all aberration limited.

If a lens truly out-resolves the sensor then the MTF50 curve for both "Centre" and "Edge" should have the shape of the pink line I drew:

Screenshot 2026-04-15 154223 by acurian, on Flickr
Sigma 56mm data.

There’s also a trade-off to increasing megapixel count. More pixels typically lead to slower sensor readout (eg: R1 vs R5ii) and longer buffer clearing times. That slower readout means the AI processor is working with slightly delayed data, which can negatively impact auto-focus performance which decreases hit rate. It’s not a zero-sum game.



Apr 15, 2026 at 02:49 AM
Steve Spencer
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p.2 #12 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


Scott Stoness wrote:
39mpx apsc has its place. It is better (lower fstop) than R6III with a good lens with 1.4x; and better (39mpx) than R5ii with an f4 lens cropped (17mpx).


I think better here really is a bit too simple. A 39 MP APS-C stacked sensor would be better in some ways, but not as good in other ways, and I think what you really need to compare it to within the Canon system is the R5 II with a 1.4X TC, and in that comparison I think many people would prefer for the 5D Mk II with a 1.4X TC over a 39 MP APS-C body, I know I would and here is why.

Let us start with resolution, where the APS-C body would have a slight advantage. Let's say you want to use a 600 f/4L for the equivalent of 960mm with the APS-C body. Can you get that reach with the R5 II? Actually you pretty easily can. Just add a 1.4X TC to that lens, which still focusses great with that combo and still has excellent performance. Add a tiny 1.14X crop and the R5 II with the 1.4X TC and the small crop will get you the equivalent of 960mm focal length and you will still have a 34 MP image. Yes, the APS-C body will have a small resolution advantage, but it will be very small just 6% increase in linear resolution or 450 pixels or so on the long side. That increase in resolution will be really hard to see.

But won't you lose shutter speed or increase noise with the R5 II and the 1.4X TC? Actually not, because you can just turn up the ISO a stop on the R5 II for the same shutter speed and even at that higher ISO and the small crop on the R5 II, you should get the same noise performance as on a 39 MP stacked sensor APS-C camera.

Ok, if you get even a little more resolution and similar noise performance, why prefer the R5 II? The answer for me is versatility. I can take that 1.4X TC off that 600 f/4L if that is enough reach, and it will be for lots of shooting for me, and I now get higher resolution with the R5 II (although not be much so probably not a big deal) but substantially fast shutter speed (at least twice as fast if we equalize noise) or substantially lower noise (at the same ISO as the APS-C camera I will have a lot more noise).

It is that versatility that would make me choose the FF camera and there would be little cost to doing so. You could spin out the same sort of story with the 200-800, but there the only advantage of the APS-C camera is extra reach when that extra reach comes at the cost of lots of diffraction limited resolution and in many instances performance affected by environmental factors. Having the camera with a bit less reach, but better noise performance and less impact of diffraction starts to be a clear winner for me in this analysis.

So to me a 39 MP stacked sensor seems pretty niche and given that in my estimation it would cost something like $3,500 and Canon really has no lenses well suited for it for wildlife, I can't see Canon making it. I know you feel differently, Scott and that is fine. I could easily be wrong and there is a market for that camera and Canon is preparing lenses that suit it well. I think we will know before too long as the R7 II will likely be announced in the next few months.



Apr 15, 2026 at 07:47 AM
Toothwalker
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p.2 #13 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


ilkka_nissila wrote:
However, when I was shooting with the Nikon 500 PF which is a very high resolution lens with minimal CA, at f/5.6 I was getting erroneous bird color detail a lot of the time on 45 MP sensors. To get correct rendering of the subject in those circumstanecs, the pixel count must be increased since stopping down would introduce noise (due to practical lighting conditions that I had).


Or you can just buy a camera with a decent anti-alias filter.



Apr 15, 2026 at 12:25 PM
ilkka_nissila
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p.2 #14 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


Toothwalker wrote:
Or you can just buy a camera with a decent anti-alias filter.


Nikon doesn't make any high-resolution cameras with AA filters, and quite a lot of people seem to prefer the no AA filter solution and complain about the filter in cameras that have it because it does blur the images. The need for the filter can be avoided by allowing a tiny bit of movement into the exposure or by using a suboptimal aperture in many cases. However, if the objective is the correct rendering of fine detail in all circumstances then a higher resolution sensor is the correct solution. As lenses get sharper through optical development, the need for higher resolution sensors becomes more widely realized.



Apr 16, 2026 at 04:33 AM
Steve Spencer
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p.2 #15 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


ilkka_nissila wrote:
Nikon doesn't make any high-resolution cameras with AA filters, and quite a lot of people seem to prefer the no AA filter solution and complain about the filter in cameras that have it because it does blur the images. The need for the filter can be avoided by allowing a tiny bit of movement into the exposure or by using a suboptimal aperture in many cases. However, if the objective is the correct rendering of fine detail in all circumstances then a higher resolution sensor is the correct solution. As lenses get sharper through optical development, the need for higher
...Show more

Ikka,

People do like cameras with no AA filter and the results do appear sharper when examined at high magnification. That said, the apparent sharpness comes at the cost of color errors and false detail. Reasonable people can disagree about that tradeoff, but if you haven't read what Toothwalker has written about this issue you should. He has some really good arguments. And yes it is true that as lenses get sharper this tradeoff between apparent detail and false color and more accurate capture of the image applies in more situations and one solution to this tradeoff is higher resolution sensors, but a different solution is also to use an AA filter even with higher resolution sensors. I think that second solution is what Toothwalker is suggesting would be a good way to go.



Apr 16, 2026 at 05:54 AM
ilkka_nissila
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p.2 #16 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


Steve Spencer wrote:
Ikka,

People do like cameras with no AA filter and the results do appear sharper when examined at high magnification. That said, the apparent sharpness comes at the cost of color errors and false detail. Reasonable people can disagree about that tradeoff, but if you haven't read what Toothwalker has written about this issue you should. He has some really good arguments. And yes it is true that as lenses get sharper this tradeoff between apparent detail and false color and more accurate capture of the image applies in more situations and one solution to this tradeoff is higher resolution
...Show more

My point was not to discuss the merits of having an AA filter or not, but that modern high quality lenses outresolve current sensors in many cases and the presence of moire in those test shots made with Sony 50-61MP sensors at small apertures f/11, f/16 prove this. The presence of moire suggests that higher pixel densities can produce more detailed and more faithful images with these lenses even at these mid to small apertures. A 39 MP APS-C sensor would produce a bit more detail at f/7.1 than current sensors that that really is what I was getting at. Diffraction will limit resolution but where that limit really is, is not quite so clear-cut. Canon seem to use AA filters in more cameras than Sony, Nikon, Fujifilm etc. and this means there won't be that frequent moire in the images of similar subjects taken with those Canon cameras, but this does not disprove that there is probably more detail that could be resolved using Canon lenses with higher-resolution sensors at similar apertures, even though I can't prove it in such an easy & obvious manner without an appropriate sensor and test setup.

Canon just launched a 40-1200 mm T5.0-10.8 (with 1.5x extender, 60-1800 mm T7.5-16.2) and it's a Super 35 mm lens natively but with 1.5x active, it also covers 35mm full frame. "Canon’s optical technologies provide the optical performance to support 8K resolution throughout the zoom range. Aberrations are controlled as much as possible for outstanding performance from the center of the image to the edges."



Apr 16, 2026 at 06:52 AM
Steve Spencer
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p.2 #17 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


ilkka_nissila wrote:
My point was not to discuss the merits of having an AA filter or not, but that modern high quality lenses outresolve current sensors in many cases and the presence of moire in those test shots made with Sony 50-61MP sensors at small apertures f/11, f/16 prove this. The presence of moire suggests that higher pixel densities can produce more detailed and more faithful images with these lenses even at these mid to small apertures. A 39 MP APS-C sensor would produce a bit more detail at f/7.1 than current sensors that that really is what I was getting at.
...Show more

I agree that increased pixel density can produce greater detail with good lens and probably even at narrower apertures.The increased detail will be diminished with lenses that don't resolve as well and with narrower apertures in which diffraction in affecting the image more.

With regard to an R7 II with a possible 39 MP BSI stacked sensor, what I have argued is that I have doubts about the extra pixel density creating much of an increase in details using slower less highly performing lenses like the RF 100-400 f/5.6-8 or the RF 200-800 f/6.3-9,and I would be very surprised if it produced more detail with the 600 f/11 or 800 f/11 lenses.

I think it would provide more detail for lenses like the RF 400 f/2.8L or the RF 600 f/4, but I again have doubts it would provide noticeably better performance than the R5 II with a 1.4X TC using those lenses.

The one situation where it might really provide more resolution is with the RF 100-300 f/2.8L with the 1.4X TC, giving and effective focal length of 225-675. Here, I think an R7 II might have an advantage over the RF 100-300 f/2.8 with the 2X TC on the R5 II, but again that would need to be tested.

My basic point is I am not sure that the proposed R7 II with a 39 MP stacked BSI sensor would have much of a market. I am not sure it offers much with the less expensive Canon RF lenses and I am not sure it provides much of a boost over the performance of the R5 II with an extender added to the more expensive lenses. And given that it would be an expensive camera and doesn't provide much advantage over the R5 II I doubt there is much of a market for it. I could be wrong and I would always like to see Canon make good options in cameras, but I don't think they will make the R7 II a high level wildlife camera. We will see before long as some sort of R7 II seems likely in the next few months.



Apr 16, 2026 at 07:19 AM
Scott Stoness
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p.2 #18 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


There are several benefits of R7ii vs R5ii or R6ii and R6iii.

On a very good lens, 1.6x magnification by sensor (apsc vs ff) is marginally superior to magnification by 1.4x. see https://www.the-digital-picture.com/Canon-Cameras/Lets-Talk-About-Reach-Does-an-APS-C-Format-Imaging-Sensor-Increase-Reach.aspx for a discussion of same. "The R7 image appears to have very slightly better resolution, and the R5 result's details [with 1.4x] are slightly larger, though I doubt these slight differences will be noticed in real-world images. " [He makes this conclusion without cropping both. I think the differences would be greater with 1/3 crop].

Using a 1.4x (ff) on R5 family, increases the fstop of the lens, taking the lens further into its defraction zone and results in magnifying defraction distortion, but even more importantly, it causes either a 1stop increase in ISO or a 1/2 the shutter speed to keep the same image. It has been suggested above that higher iso does not matter because APSC has 1 stop lessor iso performance than FF. However in low light, you may not be able to increase the ISO, causing motion blur.

The other benefits are
- r7ii is significantly cheaper than R5ii and 1.4x,
- r7ii gives higher overall net magnification 32mpx vs 17mpx when I am reach limited. Eg on my 600f4/1.4x, I only achieve 17mpx if I crop 1/3 vs 39mpx if I use the r7II 39mpx, without cropping, with roughly the same effective magnification. [This is less useful if on lessor iq/slower lens like 100-500, 200-800, 100-400 and 800/f11 but there will still be a slight gain]
- r7ii is easier to frame and focus magnified
- r7ii bolted to your best long zoom lens, avoids constant worries about 1.4x on of off fiddling. For people with two bodies (r5ii and r7) they can just leave the r7 on their best long lens and alternate between close R5ii (100-500) and far R7(eg 600f4)

So cheaper, slightly better iq than using the 1.4x, less fiddling and loss of opportunity, and much more effective reach when you hit the limit of your lens - all give the r7ii a good market niche. With cheaper at the top of the list.

You could argue that r5ii is close enough that using 1.4x is better (cheaper) if you have one. But my most recent field experience is that I could only bring one lens for a polar bear trip. My best zoom is ef 200-400 with flip in 1.4x [560mm/f5.6], which was too short. With r5ii I was limited to 45mpx at 560mm (f5.6 before defraction reduced its iq). With r7 I was limited to 896mm 32mpx effective f5.6. I brought both bodies but soon discovered that the logistics of swapping bodies when bears were close (close was not an issue) or bears were far was not practical while standing in the cold on a moving platform. So I used R7 as default and R5ii in low light where I had lots of time (they were sitting close in late hours). I could have used my 200-800 (f9 significantly into the defraction limit) on R5ii but it would not have done as good a job as my 200-400 1.4x (f5.6 not much into defraction limit). Obviously the 200-800 would have done a good job, but the 200-400 with r7 did a better job in good light, and it was not practical to bring both lens.

If I was on a lessor budget I would have been comfortable with 200-800 with R7 - and I would have got really good pictures.

[The 5ms read speed if it comes, would have made electronic 30fps usable at 560mm in this instance. For this instance though, the bears don't move that much, and it would have just added to the culling. And 39mpx would have pushed the 200-4001.4x f5.6 further into defraction, likely making 39mpx not much different than 32mpx r7.]



Apr 16, 2026 at 09:14 AM
Scott Stoness
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p.2 #19 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


On a statistical note, there have been 2500 views, with about 18 votes, 6/18 33% say they would buy at $2500. But the majority of views have not voted, ---- the fact they clicked on it suggests interest, but not voting suggests they are not overly interested ? And more R5 family interest than r6 interest. ? They don't get to see results without voting.

The votes are too few to be indicative but it suggests the R7 is of more interest to R5 family than r6 family - which I guess is logical. R5 have more budget and would consider. R6family likely have less budget or they would have and r5 family. And R7ii would be expensive.

But 18 votes out of 2500 is not very reliable statistically. But not voting (no results) does indicate they don't care - not interested in R7II. 18/2500 suggests a very small market opportunity and Canon needs to focus on upscale (5ms $2500 r5 family and abandon r6 crowd) or downscale (15ms $1999 family and abandon r5 crowd). A hard choice for Canon.



Apr 16, 2026 at 09:40 AM
Steve Spencer
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p.2 #20 · Re - would you buy 39mpx, 5ms read, 30fps, CFEx


Scott Stoness wrote:
On a statistical note, there have been 2500 views, with about 18 votes, 6/18 33% say they would buy at $2500. But the majority of views have not voted, ---- the fact they clicked on it suggests interest, but not voting suggests they are not overly interested ? And more R5 family interest than r6 interest. ? They don't get to see results without voting.

The votes are too few to be indicative but it suggests the R7 is of more interest to R5 family than r6 family - which I guess is logical. R5 have more budget and would
...Show more

Scott,

We had 10 people say they would be interested in buying the camera at all and 11 people say they weren't interested. It is hard to know what to make of that. It is indeed a very small number of people responding and the sample is likely not at all representative of potential camera buyers. Given the views it also seems likely that only a small percentage of people who viewed the poll responded to it. Meaning there is even a greater chance that the survery doesn't represent potential camera buyers well. We also don't know of the people who viewed the poll how many are R5 family owners, how many are R6 family owners, and if any owns something else (not a Canon owner but perhaps currently own an R7, which might be an important group). I am one of the 10 and I own a R5, but I also own an R7. Is such an owner more or perhaps less likely to buy an R7 II? Unfortunately, the poll doesn' really help us answer any of these questions.

What I think we do know is that Sony, Nikon, and Canon seem to have treated APS-C cameras as a bit of an after thought and FF cameras as their core products. They make way more lenses for FF cameras. They make many more versions of sensors for FF cameras. They introduce almost all their new technology (e.g. stacked BSI, global shutter) with FF sensors. Sony for example has had a stacked sensor BSI in their FF cameras for 9 years and haven't yet made an APS-C with a stacked BSI sensor. They even make such a sensor for Fuji, but haven't put it in their own cameras. Nikon only has two APS-C sensor cameras and they feature the same 21 MP sensor, so they are not focussing on pixel density at all. And for DSLR's it was Nikon that arguably built the best APS-C camera for wildlife in the D500. Both Sony and Nikon has set up APS-C as their low end cameras. Canon has made the R7 and it is a bit higher level than anything from Sony or Nikon, but just a little bit. It has higher pixel density, a better mechanical shutter, and a little bit better EVF. It looks to me, however, that Canon has positioned their cameras as R100 for lowest price, R10, R7/R8, R6, R5, R3, R1. The R7 sits where it does as a more action oriented alternative to the R8 which provides a FF sensor. The question is will Canon up position the R7 II as an alternative to the R6 (I think that would be a 24MP stacked sensor with a 8ms sensor scan speed) or will they even position it as an alternative to the R5 (I think a 39 MP stacked BSI sensor with 3ms sensor scan speed is really an alternative to the R5). I don't think they will move this camera up in position, but we will see. I think it will be an alternative to the R8 and will be a 39 MP non-stacked sensor with about a 15ms sensor scan speed. I suppose we will know before too long.



Apr 17, 2026 at 08:15 AM
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