▁position ▁as ▁where ▁the ▁foc using ▁wheel ▁was ▁located ▁on ▁classic ▁Dresden ▁and ▁Stuttgart ▁Cont ax ▁range find ers . ▁In ▁addition , ▁the ▁G 2 ▁was ▁made ▁available ▁in ▁a ▁black ▁finish ▁along ▁with ▁black ▁versions ▁of ▁the ▁T LA 2 0 0 ▁flash ▁and ▁ 2 8   mm , ▁ 4 5   mm , ▁and ▁ 9 0   mm ▁l enses . ▁ ▁A ▁new ▁active ▁auto - focus ▁system ▁has ▁been ▁added ▁to ▁the ▁G 2 , ▁which ▁uses ▁near - inf ra red ▁be ams ▁to ▁set ▁the ▁range . ▁The ▁G 2 ▁auto - focus ▁also ▁has ▁two ▁foc using ▁modes : ▁continuous , ▁which ▁constantly ▁adjust s ▁focus ▁as ▁the ▁camera ▁is ▁moved ; ▁and ▁single , ▁which ▁is ▁a ▁safety ▁mode , ▁foc uss ing ▁as ▁the ▁focus ▁button ▁is ▁pressed ▁( or ▁sh utter ▁release ▁half - pressed ), ▁and ▁maintain ing ▁this ▁reading ▁until ▁the ▁sh utter ▁is ▁released . ▁If ▁the ▁camera ▁fails ▁to ▁find ▁focus ▁in ▁this ▁mode , ▁the ▁sh utter ▁cannot ▁be ▁released . ▁ ▁L enses ▁The ▁l enses ▁designed ▁by ▁Carl ▁Ze iss ▁for ▁the ▁G - series ▁quickly ▁established ▁it ▁as ▁a ▁camera ▁of ▁worth : ▁the ▁original ▁tri o ▁of ▁l enses ▁released ▁with ▁the ▁G 1 ▁included ▁the ▁ 4 5   mm ▁ 2 ▁Plan ar , ▁ 2 8   mm ▁ 2 . 8 ▁Bi og on , ▁and ▁ 9 0   mm ▁ 2 . 8 ▁S