Comparison of Samsung 16-50mm ƒ/2-2.8 S ED OIS NX and Sigma 17-50mm ƒ/2.8 EX DC OS HSM

Attribute	Samsung 16-50mm ƒ/2-2.8 S ED OIS NX ×	Sigma 17-50mm ƒ/2.8 EX DC OS HSM ×
Aperture (f)	2.00 - 22.00	2.80 - 22.00
Filter Size (mm)	72	77
Notes	Samsung NX Mount; Optical Image Stabilization; Lens hood included; i-Function; Splash and dust proof.	Image Stabilized (except for Pentax and Sony mounts). Available AF Mounts: Canon, Nikon, Pentax, Sigma, Sony. Included Accessories: Case, Petal-type
Closest Focus (m)	0.3	0.28
Magnification Ratio (x)	0.19	0.2
Zoom System	Rotary	Rotary with lock
Type	Standard Zoom	Standard Zoom
APS Equivalent	24.6 - 77mm	1.5x: 26 - 75mm; 1.6x: 27 - 80mm
Diaphragm Blades	9	7
Image Circle	Samsung NX (APS-C)	APS-C
Focal Length (mm)	16.00 - 50.00	17.00 - 50.00
Brand	Samsung	Sigma
Name	Samsung 16-50mm ƒ/2-2.8 S ED OIS NX	Sigma 17-50mm ƒ/2.8 EX DC OS HSM
Weight (g)	622	565
Diaphragm Blades Type	circular	rounded
Lens Construction	18 elements in 12 groups, including 3 Aspherical, 2 Extra-low Dispersion and 2 Xtreme High Refractive elements	17 elements in 13 groups, including 2 FLD glass elements
Diagonal Angle of View (degree)	31.40 - 82.60	27.90 - 72.40
Length (mm)	96.5	91.8
Diameter (mm)	81	83.5
Focus Details	UPSM (Ultra-Precise Stepping Motor), silent autofocusing	Internal, with Hyper-Sonic Motor; AF/MF switch