Hi all,
I keeping my fingers crossed for my trip to Yosemite in late February to catch Horsetail Falls in the "firefall" sunset. However, the longest lens I have is a 150 for my 4x5 Arca Swiss F-Metric with a standard bellows so I'm looking at renting a longer lens ...I prefer to get the longest contrasty lens I can. Your input is greatly appreciated.

These are my choices:

240mm f 5.6 Schneider Symmar-S
240mm f 5.6 Nikkor W Lens
300mm f 5.6 Rodenstock or Schneider
360mm f 6.8 Rodenstock Sironar
360mm f 8.0 Schneider Symmar-S
450mm f 9.0 Nikkor M
480mm f 8.4 Schneider Symmar-S
480mm f/9.0 Apo-Ronar with Copal 3
600mm f 11.5 Fuji C

Thank you again for your help in advance.