I have access to a Cooke apochromatic process 25" series IX. I don't own it and it is not for sale. What are good uses for such a lens? I shoot my own Horseman 8X10 and have access to a Levy process camera and a Fotar 10 X 10 vertical enlarger. There will be more old lenses to try. The owner may be interested in it's worth, but so far he sells nothing. It look pretty clean to me. My longest lens is a Rodenstock APO-Ronar 480mm f:9. Is there anything to gain or learn in mounting the Cooke up? Obviously I am new to 8 X 10. I do like shooting portraits with 4 X 5 and a 300mm. Perhaps I will need a the 25" to be happy at 8 X 10. Random plinking welcome!