@mattblaze the 150mm I have (f/2.8 non-LS) is quite lovely, but everything longer is meh
@mattblaze on my way out of town the other day I wished I had my 300mm on me, the 150mm wasn't nearly tight on the planes I was watching take off from the lounge. That said, the XF and four lenses is already more than heavy enough that I'd have been regretting it the entire trip.
@mattblaze@federate.social I have the Mamiya 500mm which I modified to mount on an XF, have yet to use it beyond experiments. I don't take it with me, but the 300mm isn't too bad. I tend to stop with the 150mm (or occasionally a Zeiss 180mm if I really want a heavy manual setup)