Rodenstock Heligon coverage

Picked up a Linhof Super Technika III 6x9. Included in the kit is a Rodenstock Heligon 90mm f/2.8. I was unable to find much information on this lens in particular the coverage. It certainly covers the 6x9 but was curious if it also might cover 4x5. Any insight would be appreciated.

~54 degrees, not for 4x5. But try it to see what it does outside of a 100 mm circle.