Please help me!! I dont have the slightest clue about photography, not even sure if i have come to the right forum! I have several lens's All identical. Im trying to sell them but do not know how good they are or how you judge a lens. They are quite big at 200mm long and 80mm diameter. The markings are as follows: P.ANGENIEUX PARIS LENS MADE IN FRANCE F.10_150mm 1:2_2.8 ANGENIEUX-ZOOM TYPE 15 X 10B Each moving section has a toothed gear on it (ready for motor driving) focus goes from 1.5 to 10m, zoom from 10 to 150, iris (i think) goes 2216,11,8,5.6,4, dot, 2.8,2.2 T please help me as i am baffled with all sorts of numbers! Thanks peops :?