GMCPhotographics
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Hmm sort of, and not quite. The R5ii and all of the stacked sensors from Canon seem to be resolving detail from the sensor at a lower level than their previous non stacked version yeilded, for the same megapixel count.The R5 (and mark II) reportedly has roughly the same resolving power as the 5DsR, even if it has a slightly lower MP count.
If we compare sensor resolution tests from https://www.optyczne.pl/testy_aparatów.html, we can see the R1 and R3 resolve less detail than R6mkII.
The R6II and R5 resolved detail far higher than their DSLR counterparts. With the R5, it;s sensor out resolves both the 5DS, and the 5DSR. The R5's 45mp sensor gives a score of 82 against the 5DSR's score of 79, the 5Ds with a score of 67. So the R5 does resolve slightly more detail for it's lower pixel count than the mighty R5sr.
The R6ii yields a suprisingly high score of 64, which means the R6ii's 24mp sensor is resolving nearly the same level of detal (but not quite) than the 5Ds's 50mp....that's a stunning result and shows that there is more to resolving power than it's pure pixel count.
45mp in the R line up seems to trump 50mp from the older EF lineup and is the current highest detail resolver of any full frame Canon camera. The R7 is the highest Canon resolver of MFT50 charts at a stunningly high 92 value.
We have yet to see the sensor test results for the new R6iii, with it's 33.5mp non stacked sensor. It should theoretically close the gap between the R5 original and the R6ii. I'm predicting a score of around 72 (matching the Sony A7 IV's 33mp score). This easily out resolves the 5Ds but not quite the 5Dsr.
However, things seem to go a bit awry with Canon's stacked sensors. The R5ii's sensor yeilds a suprisingly low value of 76. Which is suprisingly lower than the R5's value of 82.
It means that the projected R6iii's value is very close to the current R5ii. It is quite likely that the real world detail resolution for the R6iii matches the R5ii. 33mp non stacked sensor matching the detail of the 45mp stacked sensor. Meaning that the only virtue of the R5ii is it's stacked sensor.
The R1 has a value of 59 and the R3 a very low 53, both lower than the R6ii's value of 64. The R3 by a significant amount.
So disgregard anyone saying that the R1 and R3's files are better than the R6ii...clearly (pun intented) they are not.
Summary of findings:
The highest resolving camera by Canon: R7 by some margin.
The highest resolving full frame camera by Canon: R5
A suprising result from the low pixel count R6ii (this has validated something I've been saying for a while)
A dissapointing result from the R5ii, R3 and R1 cameras, which all carry a stacked sensor.
I suspect that Canon can mitigate this lower stacked sensor detail resolution but designing a new breed of AA filters that are fine tuned for the stacked sensor depth and not re-using the same spec / design of AA filter employed on their non stacked sensor cameras. It's this AA sensor that allows the 45mp R5 to eclipse the higher 50mp 5Ds in it's MFT50 score.
However, in the past we all managed to produce customer happy professional images on cameras giving MFT50 results in the 45 scores....so take these results with a pinch of salt, becuase a good photo is always a good photo regardless of how much detail it's resovled.
It also means that have have clear detail MFT chart guidance to lens MFT chart paring. A RF 200-800mm lens will be soft at the long end on a R7, slightly soft on a R5, but banging sharp on a R5ii. The R5ii's Sensor will be less resolved than the lens.
This is food for thought if Canon ever makes a 60+ mp Sensor, depending on the AA filter...we might have a camera that out resolves all of the current RF lenses except for the big whites, the RF 135L and the two Z lenses. If that hyperthetical camera ever came out, then we would need to stop down all of our lenses by at least a stop to optically out resolve the sensor...or really spank up our post production sharpening routines to compensate.
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