The Goerz 14" Apo Artar must be very different from the lens I have which is a Goerz 14" Apochromatic Red Dot Artar. I use mine more than any other on my 8x10 and it has lots of coverage and is very sharp. I do mostly still life but I have taken it out and used it at infinite a few times.
The Red Dot series is coated. This is the only difference.
Don't confuse "illuminate" with "cover sharply to the corners".