Quote Originally Posted by faberryman View Post
I do not know of any 50mm lens for large format, certainly none that would focus with 300mm of bellows extension. But that is just my world.
There are plenty. I'll just mention a few that I have. Here is my Mamiya 37mm f4.5 fisheye -- makes absolutely, unbelievable close-up shots:

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Here's still more, among them a Minolta 12.5mm f2.5, a Minolta 25mm f2.0, and a Minolta 50mm f3.5. I've used all of them with more than 300mm of extension:

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Then there's my Schneider 47mm XL f5.6 and Fujinon SWD 65mm f5.6 that I've used with long extensions at times, but I think I've made my point. Happy spot metering -- when it's appropriate, which isn't too often, I use a Minolta Autometer II with 5 degree spot attachment.