onn ar ; ▁the ▁ 1 6   mm ▁ 8 ▁H olog on ▁was ▁announced ▁at ▁the ▁system ▁launch ▁but ▁was ▁not ▁immediately ▁available . ▁The ▁G 2 ▁was ▁released ▁in ▁ 1 9 9 6 ▁alongside ▁the ▁ 2 1   mm ▁ 2 . 8 ▁Bi og on ▁and ▁ 3 5   mm ▁ 2 ▁Plan ar . ▁The ▁ 3 5 – 7 0   mm ▁ 3 . 5 – 5 . 6 ▁V ario - S onn ar , ▁the ▁first ▁zoom ▁l ens ▁for ▁a ▁range find er ▁camera , ▁was ▁the ▁last ▁l ens ▁to ▁be ▁released , ▁in ▁ 2 0 0 0 . ▁All ▁l enses ▁were ▁aut of ocus ▁with ▁the ▁exception ▁of ▁the ▁H olog on ▁ 8 / 1 6 mm . ▁ ▁The ▁fl ange ▁distance ▁between ▁the ▁front ▁surface ▁of ▁the ▁l ens ▁mount ▁and ▁the ▁film ▁plane ▁is ▁only ▁, ▁and ▁Cont ax ▁released ▁the ▁G A - 1 ▁adapt or ▁which ▁allowed ▁the ▁use ▁of ▁Cont ax / Y ash ica ▁mount ▁l enses . ▁Un like ▁most ▁bay on et - mount ▁l enses , ▁the ▁Cont ax ▁G ▁mount ▁uses ▁a ▁b ree ch - lock ▁mechanism ▁similar ▁to ▁the ▁manual - focus ▁Can on ▁F D ▁and ▁F L ▁mount . ▁ ▁The ▁very ▁high ▁optical ▁quality ▁of ▁the ▁G - series ▁l enses ▁makes ▁them ▁excellent ▁candidates ▁for ▁use ▁with ▁high - resol ution ▁digital ▁sens ors . ▁Ad ap ters