▁through ▁reflection ▁at ▁each ▁surface . ▁Red uc ing ▁reflection ▁via ▁anti - reflect ive ▁coat ings ▁also ▁reduces ▁the ▁amount ▁of ▁" lost " ▁light ▁present ▁inside ▁the ▁bin oc ular ▁which ▁would ▁otherwise ▁make ▁the ▁image ▁appear ▁ha zy ▁( low ▁contrast ). ▁A ▁pair ▁of ▁bin oc ular s ▁with ▁good ▁optical ▁coat ings ▁may ▁yield ▁a ▁br ighter ▁image ▁than ▁un co ated ▁bin oc ular s ▁with ▁a ▁larger ▁objective ▁l ens , ▁on ▁account ▁of ▁superior ▁light ▁transmission ▁through ▁the ▁assembly . ▁A ▁classic ▁l ens - co ating ▁material ▁is ▁mag nes ium ▁flu or ide , ▁which ▁reduces ▁reflected ▁light ▁from ▁ 5 % ▁to ▁ 1 %. ▁Modern ▁l ens ▁coat ings ▁consist ▁of ▁complex ▁multi - layers ▁and ▁reflect ▁only ▁ 0 . 2 5 % ▁or ▁less ▁to ▁yield ▁an ▁image ▁with ▁maximum ▁bright ness ▁and ▁natural ▁colors . ▁ ▁Ph ase ▁correction ▁coat ings ▁ ▁In ▁bin oc ular s ▁with ▁roof ▁pr isms ▁the ▁light ▁path ▁is ▁split ▁into ▁two ▁paths ▁that ▁reflect ▁on ▁either ▁side ▁of ▁the ▁roof ▁pr ism ▁r idge . ▁One ▁half ▁of ▁the ▁light ▁reflect s ▁from ▁roof ▁surface ▁ 1 ▁to ▁roof ▁surface ▁ 2 . ▁The ▁other ▁half ▁of ▁the ▁light ▁reflect s ▁from ▁roof ▁surface ▁ 2 ▁to ▁roof ▁surface ▁ 1 . ▁If ▁the ▁roof ▁faces ▁are ▁un co ated , ▁the ▁mechanism ▁of ▁reflection ▁is ▁Total ▁In ternal ▁Ref lection ▁( T IR ). ▁ ▁In ▁T IR , ▁light