Comparison of Pentax 50mm ƒ/1.8 SMC DA and Samsung 45mm f/1.8 NX 2D/3D

Attribute	Pentax 50mm ƒ/1.8 SMC DA ×	Samsung 45mm f/1.8 NX 2D/3D ×
Filter Size (mm)	52	43
Aperture (f)	1.80 - 22.00	1.80 - 22.00
Closest Focus (m)	0.45	0.5
Magnification Ratio (x)	0.15	0.12
Type	Tele Prime	Telephoto Prime 2D/3D
Focus Details	Quick-shift Focus System for instant switching from auto to manual focus	Autofocus with manual focusing ring; AF/MF switch; Stepping motor for smooth, quiet AF
APS Equivalent	76.5mm	69.3mm
Diameter (mm)	63	61.5
Image Circle	APS-C	Samsung NX (APS-C)
Focal Length (mm)	50.00	45.00
Brand	Pentax	Samsung
Name	Pentax 50mm ƒ/1.8 SMC DA	Samsung 45mm f/1.8 NX 2D/3D
Weight (g)	122	115
Diaphragm Blades Type	rounded	circular
Diaphragm Blades	7	9
Diagonal Angle of View (degree)	31.50	34.70
Length (mm)	38.5	44.4
Notes	-	Samsung NX Mount; Employs alternating LCD shutters in 3D mode; Included Accessories: lens caps, lens hood
Lens Construction	6 elements in 5 groups; Front surface has SP (Super Protect) coating	7 elements in 6 groups