Samsung F-DLENS019-01 12/24 mm Lens mount K + Black (Accessory)
Objective of very good quality. The picture quality is perfect. Nevertheless the adapter ring supplied with (K-mount to NX) is not electronic! suddenly it's as if you had a goal completely manual (hence only 3 out of 5 stars). By cons, if you step on
Samsung F-DLENS019-01 12/24 mm Lens mount K + Black (Accessory)
When mounted on a Pentax K5 photos are sublime as soon as 12 f4 in 24mm! The objective is the equivalent of Pentax DA 12-24mm f4 logo and less ... go for it!