oid ▁x 5 3 0 , ▁a ▁compact ▁camera ▁with ▁a ▁ 1 4 0 8 ▁× ▁ 1 0 5 6 ▁× ▁ 3 , ▁ 1 / 1 . 8 - in . ▁sensor . ▁The ▁camera ▁had ▁a ▁limited ▁release ▁in ▁ 2 0 0 5 ▁but ▁was ▁re called ▁later ▁in ▁the ▁year ▁for ▁un spec ified ▁image ▁quality ▁problems . ▁S igma ▁announced ▁a ▁prototype ▁of ▁its ▁F ove on - based ▁compact ▁camera ▁in ▁ 2 0 0 6 , ▁the ▁S igma ▁D P 1 , ▁using ▁the ▁same ▁ 1 4 ▁MP ▁sensor ▁as ▁the ▁SD 1 4 ▁D SL R . ▁A ▁re vised ▁version ▁of ▁the ▁prototype ▁was ▁exhib ited ▁in ▁ 2 0 0 7 , ▁and ▁the ▁camera ▁was ▁eventually ▁launched ▁in ▁spring ▁ 2 0 0 8 . ▁Un like ▁the ▁Pol ar oid ▁x 5 3 0 , ▁the ▁D P 1 ▁had ▁an ▁A PS - C - s ized ▁sensor , ▁with ▁a ▁ 2 8 ▁mm ▁equivalent ▁prime ▁l ens . ▁The ▁camera ▁was ▁subsequently ▁re vised ▁as ▁the ▁D P 1 s ▁and ▁the ▁D P 1 x . ▁In ▁ 2 0 0 9 , ▁the ▁company ▁launched ▁the ▁D P 2 , ▁a ▁compact ▁camera ▁using ▁the ▁same ▁sensor ▁and ▁body ▁as ▁the ▁D P 1 ▁but ▁with ▁a ▁ 4 1 ▁mm - equ ivalent ▁f / 2 . 8 ▁l ens . ▁ ▁F ove on ▁X 3 ▁sens ors ▁were