Comparison of Panasonic 24-70mm f/2.8 Lumix S Pro (S-E2470) and Sigma 18-35mm ƒ/1.8 DC HSM Art

Attribute	Panasonic 24-70mm f/2.8 Lumix S Pro (S-E2470) ×	Sigma 18-35mm ƒ/1.8 DC HSM Art ×
Aperture (f)	2.80 - 22.00	1.80 - 16.00
Filter Size (mm)	82	72
Notes	Splash- and dust-resistant. Included Accessories: front and rear lens caps, lens hood, storage bag.	Available AF Mounts: Canon EF, Nikon F, Sigma SA, Pentax K and Sony A; Included Accessories: lens hood, caps.
Closest Focus (m)	0.37	0.28
Magnification Ratio (x)	0.25	0.23
Zoom System	Rotary (with lock switch)	Rotary with lock
Type	Standard Zoom	Wide Zoom
APS Equivalent	36 - 105mm	1.5x: 27 - 52.5mm; 1.6x: 28.8 - 56mm
Diaphragm Blades	11	9
Image Circle	35mm (L-Mount)	APS-C
Focal Length (mm)	24.00 - 70.00	18.00 - 35.00
Brand	Panasonic	Sigma
Name	Panasonic 24-70mm f/2.8 Lumix S Pro (S-E2470)	Sigma 18-35mm ƒ/1.8 DC HSM Art
Weight (g)	935	811
Diaphragm Blades Type	circular	rounded
Lens Construction	18 elements in 16 groups, including 3 aspherical, 1 UHR (Ultra-High Refractive Index) and 4 ED elements; Fluorine coating on front element.	17 elements in 12 groups, including SLD and aspherical elements
Diagonal Angle of View (degree)	34.00 - 84.00	44.20 - 76.50
Length (mm)	140	122
Diameter (mm)	90.9	79
Focus Details	Internal High-speed AF combining linear and stepping motors; MF Focus Clutch	Internal, with Hyper-Sonic Motor; AF/MF switch