Comparison of Samsung 18-55mm ƒ/3.5-5.6 OIS III NX and Sigma 28-70mm f/2.8-4

Attribute	Sigma 28-70mm f/2.8-4 ×	Samsung 18-55mm ƒ/3.5-5.6 OIS III NX ×
Magnification Ratio (x)	0.15	0.22
Filter Size (mm)	62	58
Length (mm)	60	65.1
Closest Focus (m)	0.5	0.28
Zoom System	Rotary	Rotary
Focus Details	-	Internal, with AF/MF switch
Focal Length (mm)	28.00 - 70.00	18.00 - 55.00
Diaphragm Blades Type	-	circular
Brand	Sigma	Samsung
Image Circle	35mm	Samsung NX (APS-C)
Name	Sigma 28-70mm f/2.8-4	Samsung 18-55mm ƒ/3.5-5.6 OIS III NX
Weight (g)	245	204
Type	Standard Zoom	Standard Zoom
Notes	Available AF Mounts: Sigma, Canon, Nikon, Minolta, Pentax; Included Accessories: Lens Hood	Samsung NX mount (metal lens mount); Image stabilization; Available in Black or White; Included Accessories: Lens hood
APS Equivalent	1.5x: 42 - 105mm; 1.6x: 44.8 - 112mm	28 - 85mm
Aperture (f)	2.80 - 22.00	3.50 - 22.00
Diaphragm Blades	8	7
Diagonal Angle of View (degree)	34.30 - 75.40	28.70 - 75.90
Lens Construction	11 elements in 8 groups, including 1 aspherical element	12 elements in 9 groups, including 1 aspherical lens
Front Element Rotation	-	-
Diameter (mm)	67.5	63