Involved in the biosynthesis of C30 carotenoids. Catalyzes the oxidation of 4,4'-diapolycopene-4,4'-dial to yield 4,4'-diapolycopene-4,4'-dioic acid. Also able to catalyze the oxidation of 4,4'-diapolycopen-4-al to yield 4,4'-diapolycopen-4-oic acid. A + all-trans-4,4'-diapolycopen-4-al + H2O = AH2 + all-trans-4,4'-diapolycopen-4-oate + H(+) 2 A + all-trans-4,4'-diapolycopene-4,4'-dial + 2 H2O = 2 AH2 + all-trans-4,4'-diapolycopene-4,4'-dioate + 2 H(+) Carotenoid biosynthesis. Cells lacking this gene produce 4,4'-diapolycopene dialdehyde in addition to the 4,4'-diapophytoene precursor. Belongs to the aldehyde dehydrogenase family.