Sigma DG 20-40 mm f/ 2.8 EX Aspherical Lens

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Sigma DG 20-40 mm f/ 2.8 EX Aspherical lens

Optical design

Format: 35mm SLR

Type: Zoom lens

Focusing: Auto Focus (AF)

Lens mounts: Canon EF, EF-S, Canon EF, EF-S, Canon EF, EF-S, Canon EF, EF-S, Sony A / Minolta A, Sony A / Minolta A, Sony A / Minolta A, Sony A / Minolta A, Nikon F (FX, DX), Nikon F (FX, DX), Nikon F (FX, DX), Nikon F (FX, DX), Pentax K, Pentax K, Pentax K, Pentax K, Sigma SA, Sigma SA, Sigma SA, Sigma SA

First year of production: 2001

Optical design: 17 elements in 13 groups

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Average price: $480

Specifications:

Focal length	Max. aperture	Min. aperture	Blades	Min. Focus (m.)	Filter Ø (mm.)	Weight (gr/oz)	Length (mm/in)
20mm - 40mm	f/2.8	f/22	9	0.3	82	595/21	108/4,3

Additional information:

The Sigma AF 20-40mm F2.8 EX DG Aspherical is a wide-angle zoom lens with constant maximum aperture for various 35 mm SLR cameras.

Posted by: strat72 Date of publication: 08.10.2012

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Mechanical quality	4.00	2
Optical quality	3.50	2
Usability	4.00	2
Pricing / Value	4.00	2
Bokeh	4.00	2
Overall lens rating	3.90

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