s ▁ ▁G D - 1 ▁- ▁For ▁the ▁G 1 . ▁Limited ▁to ▁date ▁and ▁time ▁im print ing ▁in ▁frame . ▁ ▁G D - 2 ▁- ▁For ▁the ▁G 2 . ▁Information ▁( date , ▁time , ▁expos ure ) ▁im print ed ▁between ▁frames , ▁or ▁collected ▁and ▁printed ▁on ▁first ▁two ▁frames . ▁Ex pos ure ▁information ▁includes ▁compens ation , ▁sh utter ▁speed , ▁approximate ▁a pert ure , ▁and ▁expos ure ▁mode . ▁Also ▁provides ▁interval ometer ▁functions . ▁ ▁C aps ▁ ▁G K - 4 1 ▁- ▁Front ▁l ens ▁cap , ▁ Φ = 4 6 mm ▁ ▁G K - 5 1 ▁- ▁Front ▁l ens ▁cap , ▁ Φ = 5 5 mm ▁for ▁ 2 . 8 / 2 1 ▁ ▁G K - 5 4 ▁- ▁Front ▁h ood ▁cap , ▁ Φ = 5 7 mm ▁to ▁push ▁on ▁the ▁front ▁of ▁a ▁mounted ▁h ood ▁ ▁G K - B ▁- ▁Body ▁cap ▁ ▁G K - R 1 ▁- ▁R ear ▁l ens ▁cap ▁ ▁G K - R 2 ▁- ▁R ear ▁l ens ▁cap , ▁deep ▁for ▁ 2 . 8 / 2 8 , ▁ 2 . 8 / 2 1 , ▁ 8 / 1 6 ▁ ▁C ases ▁ ▁GC - 1 1 ▁- ▁For ▁the ▁G 1 . ▁ ▁GC - 1 1 2 ▁- ▁Front / top ▁portion ▁of ▁G 1 ▁case ▁with ▁ 2 . 8 / 9