What do you need the f6.8 for? I ask as most LF lenses are not performing at their best at wide open.
I use the 355mm G Claron a lot. One thing that always surprises me is the brightness of the image that it projects, even on the edges of my 7x17” ground glass.
If you’re worried about image brightness, I would suggest it’s not as big an issue as it is with WA lenses.
PS, the 355 Claron is amazing...
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