I use a 355mm G-Claron on 12x20 and it does cover with some movements at f/32 and beyond. Also I have grown really fond of my Fuji 450mm f/8 CMW, this is not the little C lens. It is a huge heavy plasmat, but it more than covers 12x20 with plenty of movements. Both of them are sharp across the field, so they would work very well for 11x14. Also the Fuji 600C covers up to 12x20, another great lens.