Comparison of Pentax 40mm f/2.8 Limited HD DA and Samsung 30mm f/2 NX

Attribute	Pentax 40mm f/2.8 Limited HD DA ×	Samsung 30mm f/2 NX ×
Magnification Ratio (x)	0.13	0.16
Filter Size (mm)	49	43
Focus Details	"Quick Shift" AF/MF mechanism	Autofocus with manual focusing ring
Closest Focus (m)	0.4	0.25
Lens Construction	5 elements in 4 groups	5 elements in 5 groups, including 1 aspherical
Length (mm)	15	21.5
Focal Length (mm)	40.00	30.00
Diaphragm Blades Type	rounded	-
Brand	Pentax	Samsung
Image Circle	APS-C	Samsung NX (APS-C)
Name	Pentax 40mm f/2.8 Limited HD DA	Samsung 30mm f/2 NX
Weight (g)	89	85
Type	Standard Prime	Standard Prime
Notes	Available in black or silver; High-grade multi-layer HD (High Definition) coating; Rounder aperture blades should yield more pleasing bokeh.	Samsung NX Mount. Included Accessories: Lens Caps, Soft Case; Lens Hood Optional.
APS Equivalent	61mm	46mm
Aperture (f)	2.80 - 22.00	2.00 - 22.00
Diaphragm Blades	9	7
Diagonal Angle of View (degree)	39.00	50.20
Diameter (mm)	63	61.5