Serge, I've got a 121mm for 4x5 and it would probably be closer to a 65mm lens than an 80mm on 6x7. It feels to me like a 35mm lens on a 35mm camera. A mild wide. You may actually prefer a 135mm for 4x5 but I don't know if any 135mm lenses can cover 5x7.
The older Fuji 125 and 135mm single coated lenses will cover 5x7, though the 125 will not allow movements.
I use my 120SA much more than my 90, but obviously that's highly personal.
"Why can't we all just get along?" President Dale, Mars Attacks
I have a lovely and expensive Rodenstock 90mm f4.5 WA and I think it's never been on the camera. I just don't see wide very well. An old Fuji single coated 125 is one of my most used lenses in 4X5. I have a 110mm Cooke Series VII that is a worthy lens also, but no shutter.
He is no fool who gives what he cannot keep..to gain that which he cannot lose. Jim Elliot, 1949
I have both Super Angulons XL 72mm and XL 90mm with center filters for my Canham wood 5x7 camera, both lenses recommended by Mr. Canham. Watch your feet with the XL 72mm! I have slight movements with the XL 72mm. It helps to have a bag bellows for both lenses.
Best wishes --- Allen
Thanks to all for the great information.
It's a bit trickier to purchase a lens to work for two formats, taking lens coverage and overall field of view account. And the price points are quite wide as well😀
I am leaning towards getting a moderate wide angle for the 4x5 format, as opposed to the 90.
Thanks again for all the great feedback!
Rodenstock 90mm/4.5 did not, IMHO, receive the deserved mentioning in this thread. My apology if that could irritate any body here.
It covers 5x7, but do not have personal experience. Please review manufacturer website.
On 4x5, it's very sharp and not so much wide for my taste. Equivalent to 28mm in small format.
Does not need to a center filter.
I'm looking now to 11x14 crop of 49.5" enlargement from 4x5 FP4+ developed in HRX.
Of course, do not have structural capability to enlarge to 50" longer aspect(10X). Just testing lenses at the central part of the negative.
You may imagine me putting my short height nose over the 11x14 crop print, saying: this is magic, marvelous, extremely sharp for a 50" print. Yes, FP4+ has its effect, also HRX. But nothing of that sharpness could be retained if the lens is not super sharp in the first place.
Mine is older version of MC( I think), it covers 102° only. Have seen only few similar in Ebay. But, the 105° coverage version, is typically distributed and more common.
Use it with Sinar behind lens shutter, failed to reassemble in a copal shutter. It's in the heavier side, but I keep it(with Sinar shutter), ALWAYS, in my camera bag. Super satisfied with this lens.
It's a marvelous lens that covers 5x7.
Hope this useful.
The generosity of spirit in this forum is great, its warmly appreciated.