Retinol dehydrogenase with a clear preference for NADP. Displays high activity towards 9-cis, 11-cis and all-trans-retinol, and to a lesser extent on 13-cis-retinol (PubMed:12036956, PubMed:12226107, PubMed:29410696). Exhibits a low reductive activity towards unsaturated medium-chain aldehydes such as cis -6-nonenal and no activity toward nonanal or 4-hydroxy-nonenal (PubMed:15865448). Has no dehydrogenase activity towards steroid (PubMed:12036956, PubMed:12226107). {ECO:0000269|PubMed:12036956, ECO:0000269|PubMed:12226107, ECO:0000269|PubMed:15865448, ECO:0000269|PubMed:29410696}. This is the function of RDH11 (retinol dehydrogenase 11, Ensembl gene identifier ENSG00000072042).