Comparison of Panasonic LUMIX S 20-60mm F3.5-5.6 (S-R2060) and Sigma 18-50mm f/3.5-5.6 DC

Attribute	Panasonic LUMIX S 20-60mm F3.5-5.6 (S-R2060) ×	Sigma 18-50mm f/3.5-5.6 DC ×
Filter Size (mm)	67	58
Notes	Dust/splash-resistant; Included Accessories: front and rear lens caps, lens hood, storage bag.	Available AF Mounts: Canon, Nikon, Minolta/Sony, Pentax, Four-Thirds, Sigma; HSM version available for Nikon mount
Closest Focus (m)	0.15	0.25
Magnification Ratio (x)	0.43	0.29
Diameter (mm)	77.4	62
Type	Standard Zoom	Standard Zoom
APS Equivalent	30 - 90mm	1.5x: 27 - 75mm; 1.6x: 28.8 - 80mm
Diagonal Angle of View (degree)	40.00 - 94.00	27.90 - 69.30
Image Circle	35mm (L-Mount)	Image Circle
Focal Length (mm)	20.00 - 60.00	18.00 - 50.00
Brand	Panasonic	Sigma
Name	Panasonic LUMIX S 20-60mm F3.5-5.6 (S-R2060)	Sigma 18-50mm f/3.5-5.6 DC
Weight (g)	350	250
Aperture (f)	3.50 - 22.00	3.50 - 22.00
Diaphragm Blades	9	7
Diaphragm Blades Type	circular	-
Lens Construction	11 elements in 9 groups (2 aspherical lenses, 3 ED lenses, 1 UHR lens); Fluorine coating on front element.	8 elements in 8 groups
Zoom System	Rotary	Rotary
Length (mm)	87.2	67.5
Front Element Rotation	-	-
Focus Details	Internal AF with linear motor; AF/MF switch	Internal; HSM version available for Nikon mount