More about the upcoming high-megapixel EOS R system camera [CR2]

Mikehit said:

If you have a subject moving across the field of view, (a star, to take your example) it will describe an arc across the sensor. For any given shutter speed, that arc will be the same whether you are using a 20MP sensor or a 50MP sensor. So if you use a faster shutter speed on the low MP sensor, won't that also reduce the star trail in the same way?

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Mikehit said:

So you are saying that at the same shutter speed, the 1Dx does not produces a star trail but the M62 does ?
Is this the case if you have cropped the 1Dx2 for the same field of view? I ask this because if you have not cropped the 1Dx2 image you are looking at different magnifications (being, APS-C the M6ii will effectively be a crop of the 1Dx2).
Similarly, if you are looking at both images at 100%, you are looking at the M6ii image at a greater magnification than the 1Dx2.

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dcm said:

The arc across the sensors would be the same when measured in millimeters, but not in pixels. In the example I'm comparing star trails of 11 pixels which can be scaled down to 1 pixel. If I want an image with no star trails (a 1 pixel star remains a 1 pixel star), the high MP sensor requires a faster shutter speed to not produce a trail. In my case I need a 2X faster shutter speed on the M6II compared to the 1DXII if I want no star trail using the same lens.

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Canfan said:

Hope is my isn’t larger than the EOSR. I think the R’s size should be the limit for mirrorless cameras. I think camera manufacturers need to think about that.

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