Best(!) focal length for 6x12 / 6x17 formats?
I plan to purchase a Shen-Hao TFC45-ⅡB 4x5 view camera with their 6x17 / 6x12 panoramic back.
The lens I'm interested in is a Nikon 135/5.6 Nikkor-W (200mm image circle @ infinity, stopped down to F22) - it's a relatively cheap and small/light lens which gives ~25 degrees vertical, ~54 degrees horizontal and ~58 degrees diagonal angle of view on 6x14 format (same horizontal angle of view with a 35mm lens on 35mm format).
1. Do you think 135mm is a nice choice for formats 6x12 and 6x17?
I'm afraid of lenses as wide as 90mm (as far as I can understand, for some reason this is the most preferred focal length for 6x17) since the horizontal angle of view is quite wide - read as: presumably hard do manage... I also don't want exaggerated perspective effects.
2. What can you say about Shen-Hao's 4x5 camera and panoramic film back?
3. Do you find 135mm a good choice for a single-lens 4x5 LF system?
4. What would be your recommendations for a multi-format >= 6x12 panoramic camera system?
Thanks in advance,