>>3188252>same as cropping the imageIncorrect. You are forgetting about distortion.
Cut a hole in a piece of paper the size of 35mm film and hold it at arm's length. That's your view of your normal lens on 35mm.
Now cut a hole the size of whatever medium format film you want. You're keeping the distortion that you had before (no glass, duh), but increasing your field of view.
>>3188241>exact same perspectiveExact same kind of distortion you'd see, but with a wider field view. You can't get that same wideness out of 35mm or smaller without introducing distortion.
In the example pic, you absolutely could get a wider lens to get to the edges of this scene, but it will look like you used a wider lens.
