If you want to take panoramic shots, the Xpan is the business. End of story 🙂
You are absolutely right. The XPan, for shooting panoramics with a RF and easy focusing and framing, etc. etc., looks pretty amazing. I wish I could afford one. And yes I would want the 30mm. But unfortunately I don't have a spare $4-5k for a complete set, and I don't think I would want one at that price.
The 30mm is pretty amazing for a wide that covers the XPan negative size. I assume it doesn't actually cover 6x7 - anyone know? I believe Schneider did make a 28mm XL lens for digital MF camera backs that would just barely cover 6x7, according to the specs, but they are pretty uncommon and I have never seen one in person. As far as image width, while it's pretty amazing, it's not even close to as wide as you can go.
One of my favorite ultrawide lenses to shoot is my Schneider 38mm XL. It covers up to a 6x12 negative. Shooting it on 6x12 is actually the equivalent of a 22mm lens on the XPan, with more on the top and bottom of the frame! Another option is the 47mm XL, which covers 6x15 just barely - which is close to the same aspect ratio as the XPan. That lens on 6x15 is almost equivalent to a 20mm lens on the XPan.
But of course you are correct, those options are much bigger, have no focusing except on ground glass or estimation, and harder to use finder options. But unlike the XPan, I actually could afford to buy them...
🙂