Official "normal" related to film diagonal, and personal concepts of "normal" angle of view are not necessarily the same thing. Some people
lean wider, others narrower. Like many large format photographers, my first rig was a 4x5 equipped with a 210 lens, which was common pro practice because this gave a larger image circle with much more even illumination than a true 150 normal, and let one home in on portraits and details better. I just picked up on this from my older brother, because when he was in pro photo school, they taught the students to first invest in a 210 for general use, and then add a 90mm next for architecture, based on the logical assumption that the students were going to be relatively poor after paying their tuition! So I came to accept 210 as my normal lens for 4x5, and something like 300 as normal for 5x7. But over time I gravitated to any even longer persepective, and now regard 250 as my normal for 4x5, and anything shorter as kinda wide-angle. So it's all relative. The nice thing about view cameras is that, if you have enough image circle to
begin with, you can use the same lenses on 4x5, 5x7, and 8x10. The longish one on 4x5 becomes a wide angle on 8x10, with 5x7 applications somewhere in between. There are all kinds of choices out there; but lately, smaller lenses have become more popular for sheer portability. Something like a 240 Fuji A or 250 G Claron would make a wonderful 5x7 lens, if you like hard-sharp with tons of wiggle
room and exceptional close-range performance (great at infinity too). Otherwise, there is a glut of excellent well-priced 210 plasmats out
there, for precisely the reason I first explained.