I can see I wasn't clear enough in how TDP shows their results, in my original comments. They do not use the same image magnification for the different sensors they test. The resolution of a lens has nothing to do with the Mp of the sensor. But on TDP, their results use a higher image magnification for the 50 Mp sensors than they use for lower Mp sensors. So if TDP's image magnification for a 30 Mp sensor shows that the sensor is already outperforming the resolution of a lens, the higher image magnification they use for a 50 Mp sensor will magnify the resolution limitations of that lens. So if the magnification they use for a 30 Mp sensor shows a lack of sharpness, then the higher image magnification they use for a 50 Mp sensor will magnify the lack of sharpness we already see on the 30 Mp magnification they use on TDP. So when I do an image comparison on TDP for the RF and EF versions of the 15-35/16-35 f2.8L lenses, they use two different image magnifications. So if the higher magnification they use for the EF results looks about as sharp as the lower magnification they use for the R results, then I would expect that the EF results should look even sharper if the test image is reduced to the same size as the R results. Having said all this, I did not take into consideration the Anti-aliasing filter on the EOS R mentioned by C. Judge. My concern was that if the 30 Mp sensor on the R is already outperforming the RF lens, then magnifying the image results as they do for the 50 Mp sensor, (so that I could compare the RF lens with the EF lens results) is going to magnify the resolution limitations of the RF lens even more for the simple reason that the 50 Mp test images are magnified more than the 30 Mp test images.