Lens comparison

Sigma 18-50mm f/2.8 EX DC vs. Tokina AF16-50mm f/2.8 PRO DX vs. Tamron SP AF17-50mm f/2.8 XR Di II LD Aspherical vs. Tamron SP AF17-50mm f/2.8 XR Di II VC LD Aspherical vs. Sigma 18-50mm f/2.8 EX DC MACRO

Lens comparison
Sigma 18-50mm f/2.8 EX DC Tokina AF16-50mm f/2.8 PRO DX Tamron SP AF17-50mm f/2.8 XR Di II LD Aspherical Tamron SP AF17-50mm f/2.8 XR Di II VC LD Aspherical Sigma 18-50mm f/2.8 EX DC MACRO

Sigma 18-50mm f/2.8 EX DC

Tokina AF16-50mm f/2.8 PRO DX

Tamron SP AF17-50mm f/2.8 XR Di II LD Aspherical

Tamron SP AF17-50mm f/2.8 XR Di II VC LD Aspherical

Sigma 18-50mm f/2.8 EX DC MACRO
Available mount(s) Canon EF, Nikon F, Pentax K, Sony / Minolta A, FourThirds, Sigma Canon EF, Nikon F Canon EF, Nikon F, Pentax K, Sony / Minolta A Canon EF, Nikon F Canon EF, Nikon F, Pentax K, Sony / Minolta A, FourThirds, Sigma
Application(s) Portrait, Landscape, Architecture Portrait, Landscape, Interiors, Architecture Portrait, Landscape, Architecture Portrait, Landscape, Architecture Portrait, Closeup, Landscape, Architecture
Category(s) Standard zoom Wide angle zoom Standard zoom Standard zoom Standard zoom
Multiplier 1.5× 1.5× 1.5× 1.5× 1.5×
Stabilizer no no no yes no
Focal length 18 - 50 mm (2.8× zoom) 16 - 50 mm (3.1× zoom) 17 - 50 mm (2.9× zoom) 17 - 50 mm (2.9× zoom) 18 - 50 mm (2.8× zoom)
Lens construction 15 elements in 13 groups 15 elements in 12 groups 16 elements in 13 groups 19 elements in 14 groups 15 elements in 13 groups
Angle of view 35mm: N/A
digital: 69.3-27.9° 		35mm: N/A
digital: N/A 		35mm: N/A
digital: 78.75-31.18° 		35mm: N/A
digital: 78.75-31.3° 		35mm: N/A
digital: 69.3-27.9°
Number of blades 7 9 7 7 7
Maximum aperture wide: f/2.8 tele: f/2.8 wide: f/2.8 tele: f/2.8 wide: f/2.8 tele: f/2.8 wide: f/2.8 tele: f/2.8 wide: f/2.8 tele: f/2.8
Minimum aperture wide: f/22 tele: N/A wide: f/22 tele: N/A wide: f/32 tele: N/A wide: f/22 tele: f/32 wide: f/22 tele: N/A
Minimum focusing distance 28 cm 30 cm 27 cm 29 cm 20 cm
Magnification 0.2× 0.2× 0.22× 0.21× 0.33×
Filter size 67 mm 77 mm 67 mm 72 mm 72 mm
Size ∅ 74.1 × 84.1 mm ∅ 84 × 97.4 mm ∅ 74 × 81.7 mm ∅ 79.6 × 94.5 mm ∅ 79 × 85.8 mm
Weight 445 g 610 g 430 g 570 g 450 g
Notes

A Nikon version with integrated focus motor is available for entry level Nikon DSLR's.

AF speed N/A N/A N/A N/A N/A
AF sound <a href="/af_sounds/303">Click here to listen to the sound of the autofocus</a> <a href="/af_sounds/368">Click here to listen to the sound of the autofocus</a>
Internal focusing yes N/A yes N/A yes
Internal zoom N/A N/A N/A no N/A
Fix front lens yes N/A yes yes yes
Mount type metal N/A metal metal metal
Weather sealed N/A N/A N/A no N/A
Drop in filter no N/A no no no
Ultrasonic AF no no no no no
Stepping motor AF no no no no no
APS-C sized circle yes yes yes yes yes
Low dispersion lens element yes N/A yes yes yes
Hard case N/A N/A N/A N/A N/A
Soft case included N/A N/A N/A included
Lens hood included
printable lens hood 		included DA09 (included)
printable lens hood 		included LH780-04 (included)
Tripod adapter N/A N/A N/A N/A N/A
Review URL
Discontinued yes N/A N/A N/A yes
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