I have been reading some things about photography and most make sense, with some exceptions.
About sensor sizes, I was reading this nice article where at some point, scrolling down, it says that with the same lens, as the sensor size gets smaller, we get a cropped version of the picture. And it summarizes it with this nice image.
What I don't get is this: with my current understanding, shouldn't the deer in the picture appear the same size in the micro 4/3 sensor size as with the full frame size? Why does the dear appears larger as we go to a smaller sensor size? All other things being equal (sensor pixel/photosite density), shouldn't the image in a smaller sensor be just cropped but the object appear the same size?
Or put it differently, will the deer appear bigger, because smaller sensors also usually have higher pixel density? Or am I missing something?