Excuse me for double checking and asking what can be find in many tables on LF sites, but I just have to be sure: will Schneider-Kreuznach Symmar (convertible) 240mm (+420mm) f=1:5.6 cover 8x10? It should, but I have been told from one slightly more experienced user that it "won't cover (good)"... (and that it would be much better if I buy his 300mm Symmar!). Is that a catch (his trial to sell me a bigger lens) or is that true?Tnx, Janko.