While 135 is a slightly wide view lens for 4x5, I have found no 135's with a large enough image circle to allow much camera adjustment, but they are nice compact lenses, and useful for landscape work where adjustments don't need to be extreme, usually.
I have found the 135mm Sironar S to have plenty of coverage, is very sharp and is just about the perfect lens for me. It is my "normal" lens, sort of like a 35mm in 35mm format.
The 180 will be a good focal length to get started with.
I believe a rule of thumb is to go with the length of the hypotenuse for "normal". The hypotenuse of 4" by 5" inches is 6.4 inches, or 163 mm. By that measure, 180 mm would be a trifle on the long side.
And now I know why Barry got scared about complexity. You just had to bring up the hypotenuse, didn't you!
its a convertible i think, so you have 2 lenses in one
it probably converts to a 315mm f12 when converted
( remove the front lens from the shutter )
i have a old 210 / 370 and it is nice when converted
nice wide open for portraits.
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