The Nikkor M 450mm F9 lens is a great bargain lens for most ULF photographers, especially if you need a lens in shutter. You will typically find this lens mounted on a Copal 3 shutter.
In terms of coverage, I know it covers at infinity on my 16×20, but very little room for movements. I typically stop down to F32 with this lens on the 16×20 and I have plenty of coverage at infinity. I use this as a slightly long lens on my 8×20 camera. I have heard rumors of possible coverage on 20×24, but I will need to confirm that.
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