▁magn ifications ▁r anging ▁from ▁ 7 x ▁to ▁ 1 0 x , ▁so ▁they ▁will ▁be ▁less ▁sus cept ible ▁to ▁the ▁effects ▁of ▁sh aking ▁hands . ▁A ▁larger ▁magn ification ▁leads ▁to ▁a ▁smaller ▁field ▁of ▁view ▁and ▁may ▁require ▁a ▁tri pod ▁for ▁image ▁stability . ▁Some ▁special ized ▁bin oc ular s ▁for ▁astronom y ▁or ▁military ▁use ▁have ▁magn ifications ▁r anging ▁from ▁ 1 5 x ▁to ▁ 2 5 x . ▁ ▁Object ive ▁diameter ▁Given ▁as ▁the ▁second ▁number ▁in ▁a ▁bin oc ular ▁description ▁( e . g . ▁ 7 x 3 5 , ▁ 8 x 5 0 ), ▁the ▁diameter ▁of ▁the ▁objective ▁l ens ▁determ ines ▁the ▁resolution ▁( sharp ness ) ▁and ▁how ▁much ▁light ▁can ▁be ▁gathered ▁to ▁form ▁an ▁image . ▁When ▁two ▁different ▁bin oc ular s ▁have ▁equal ▁magn ification , ▁equal ▁quality , ▁and ▁produce ▁a ▁sufficiently ▁matched ▁exit ▁pup il ▁( see ▁below ), ▁the ▁larger ▁objective ▁diameter ▁produces ▁a ▁" br ighter " ▁ ▁and ▁sh ar per ▁image . ▁An ▁ 8 × 4 0 , ▁then , ▁will ▁produce ▁a ▁" br ighter " ▁and ▁sh ar per ▁image ▁than ▁an ▁ 8 × 2 5 , ▁even ▁though ▁both ▁en large ▁the ▁image ▁an ▁identical ▁eight ▁times . ▁The ▁larger ▁front ▁l enses ▁in ▁the ▁ 8 × 4 0 ▁also ▁produce ▁wider ▁be ams ▁of ▁light ▁( exit ▁pup il ) ▁that ▁leave ▁the ▁e y