>>4044468Different magnifications of the OVF. X-Pro3 gives you a larger view of 23/27, but can't show frame lines at 18 (OVF edge is rough ballpark), and the X-Pro2 shows a larger view 35/50.
EVF of the X-Pro3 is just better (larger, higher resolution, better refresh rate), so if you just use EVF, then all the lenses work well. The OVF is "larger" (less tunnel-y), but you aren't necessarily using the full view for certain focal lengths anyways. Pic related.
