Why are full frame mirrorless images smaller than DSLR images?

I assume you are looking at them with the same magnification. If you use 1-1 (pixel peeping), then the difference in megapixels is what you are seeing. If you are viewing the images with fit to screen, then the framing should roughly be the same.
Please elaborate - you're saying 100% magnification is 87% magnification with R6 images?
 
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Jul 21, 2010
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Please elaborate - you're saying 100% magnification is 87% magnification with R6 images?
Imagine you have an 8K monitor, meaning a ~33 MP display. An image from your 5DIV at 1:1 would nearly fill the screen. The same image from your R6 at 1:1 would not nearly fill the screen, so the image displayed will look smaller. The same is true at 1:1 on a lower resolution display, but you only see part of the image.
 
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jd7

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Feb 3, 2013
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Please elaborate - you're saying 100% magnification is 87% magnification with R6 images?
Essentially, yes (although I haven't done the maths to check the difference is 17%).

When you view an image at 100% magnification on your screen, a pixel in the image is displayed at the same size regardless of whether you started with a 20MP image (R6) or a 30MP image (5DIV). Therefore, if you have more pixels in an image, the size of the image is bigger on your screen simply because there are more pixels (of the same size) being displayed.

When you view the images so both fit your screen, the image with more pixels is being downsampled more.

However, in either case, the relative size of the elements in the images will remain the same, ie in your case, the moon should take up the same proportion of the image regardless of whether you are looking at the 20MP image or the 30MP image.
 
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