▁of ▁Japan . ▁ ▁It ▁was ▁announced ▁at ▁phot ok ina ▁in ▁September ▁ 2 0 0 0 ▁and ▁was ▁demonstrated ▁to ▁the ▁press ▁at ▁the ▁Ph oto ▁Mark eting ▁Association ▁( P MA ) ▁show ▁in ▁January ▁ 2 0 0 1 . ▁In ▁October ▁ 2 0 0 1 , ▁Pent ax ▁cancel led ▁the ▁camera , ▁stating ▁" The ▁cost ▁of ▁manufact uring ▁the ▁prototype ▁SL R ▁ 6 - m eg ap ixel ▁digital ▁camera ▁meant ▁it ▁was ▁not ▁a ▁vi able ▁product ▁for ▁our ▁target ▁market " ▁ ▁The ▁M Z - D ▁was ▁derived ▁from ▁the ▁top - of - the - line ▁Pent ax ▁film ▁camera ▁of ▁the ▁time , ▁the ▁M Z - S . ▁To ▁give ▁space ▁for ▁the ▁extra ▁circuit ry ▁and ▁battery ▁power ▁required ▁for ▁a ▁digital ▁camera , ▁the ▁M Z - D ▁shape ▁incorpor ated ▁the ▁size ▁and ▁shape ▁of ▁the ▁M Z - S ' ▁optional ▁battery ▁boost er ▁and ▁vertical ▁g rip . ▁It ▁also ▁shared ▁the ▁Pent ax ▁K AF 2 ▁l ens ▁mount . ▁ ▁The ▁M Z - D ▁was ▁to ▁use ▁the ▁same ▁ 6 ▁meg ap ixel ▁( 3 0 7 2 × 2 0 4 8 ) ▁full ▁ 1 3 5 ▁film ▁frame ▁s ized ▁( 2 4 × 3 6   mm ) ▁C CD ▁( model ▁F TF 3 0 2 0 - C ) ▁from ▁Phili ps ▁that ▁was ▁used ▁by ▁the ▁Cont ax ▁N ▁Digital . ▁