▁correct ▁cart ridge ▁if ▁repr ints ▁are ▁desired . ▁ ▁To ▁facil itate ▁automatic ▁processing ▁of ▁film , ▁a ▁unique ▁D X ▁number ▁is ▁assigned ▁to ▁the ▁different ▁types ▁of ▁film . ▁ ▁A PS ▁film ▁is ▁typically ▁processed ▁by ▁using ▁a ▁small ▁machine ▁to ▁transfer ▁the ▁exposed ▁A PS ▁film ▁from ▁the ▁original ▁cart ridge ▁to ▁a ▁reload able ▁one , ▁then ▁re - att ached ▁to ▁the ▁original ▁cart ridge ▁and ▁re w ound ▁using ▁another ▁machine ▁after ▁processing . ▁ ▁Camer as ▁▁ ▁The ▁format ▁was ▁introduced ▁in ▁ 1 9 9 6 ▁by ▁K od ak , ▁F uj if il m , ▁Min olta , ▁N ikon , ▁Can on ▁and ▁others . ▁A PS ▁was ▁mainly ▁used ▁for ▁point ▁and ▁shoot ▁amateur ▁cam eras , ▁although ▁some ▁SL R ▁systems ▁were ▁also ▁created : ▁Can on ▁E OS ▁IX , ▁Min olta ▁V ect is , ▁N ikon ▁Pr one a ▁with ▁N ikon ▁IX ▁l enses . ▁Of ▁these ▁the ▁Can on ▁E OS ▁IX ▁and ▁the ▁N ikon ▁Pr one a ▁could ▁use ▁the ▁existing ▁ 3 5   mm ▁SL R ▁l enses , ▁whereas ▁Min olta ▁opt ed ▁to ▁create ▁a ▁new ▁l ens ▁line - up ▁later ▁shared ▁with ▁an ▁early ▁digital ▁SL R . ▁N ikon ▁developed ▁the ▁IX ▁series ▁of ▁l ens ▁that ▁were ▁l ighter ▁and ▁had ▁a ▁smaller ▁image ▁circle ▁( similar ▁to ▁the ▁N ikon ▁D X ▁format ▁used ▁since ▁ 2 0 0 4 ). ▁Although