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Sigma 17-50mm F2.8 EX DC OS HSM Nikon versus Tamron SP AF 17-50mm F/2.8 XR Di II LD Aspherical [IF] Nikon

Scores and measurements are available only for tested lenses. For preview lenses, you can compare their specs.

DxOMark Score

Best at f=50mm & f/2.8 [?]
14

Lens Metric Scores

Sharpness [?]
9 P-Mpix
Transmission [?]
3.1 TStop
Distortion [?]
0.3 %
Vignetting [?]
-1.1 EV
Chr. aberration [?]
10 µm

DxOMark Score

Best at f=24mm & f/5.6 [?]
13

Lens Metric Scores

Sharpness [?]
9 P-Mpix
Transmission [?]
3 TStop
Distortion [?]
0.4 %
Vignetting [?]
-1 EV
Chr. aberration [?]
5 µm
AnnouncedFeb. 2010 
Indicative price (USD) 669  
Aperturef/ 2.8  
Focal range (mm) 17-50  
Filter diameter (mm) 77 
Max diameter (mm) 83.5 
Mount typeNikon F DX  
StabilizationYes  
AF MotorHSM  
Zoom typeRing  
Rotating front elementNo  
Tripod mountNo  
ColorBlack  
Full-Time manual focusNo  
Number of lenses17  
Number of groups13  
Diaphragm blades7  
Circular apertureNo  
Length (mm)91.8  
Weight (gr)565  

Certain fields may be left blank. They will be updated as soon as possible.
AnnouncedJan. 2008 
Indicative price (USD) 459  
Aperturef/ 2.8  
Focal range (mm) 17-50  
Filter diameter (mm) 67 
Max diameter (mm) 73.8 
Mount typeNikon F DX  
StabilizationNo  
AF MotorNo  
Zoom typeRing  
Rotating front elementNo  
Tripod mountNo  
ColorBlack  
Full-Time manual focusNo  
Number of lenses16  
Number of groups13  
Diaphragm blades7  
Circular apertureyes  
Length (mm)83.2  
Weight (gr)430  

Certain fields may be left blank. They will be updated as soon as possible.

in P-Mpix
Focal: : 17 - 28 - 35 - 50
Focal: : 17 - 24 - 35 - 50
Aperture: 2.8 - 4 - 5.6 - 8 - 11 - 22
Aperture: 2.8 - 3.5 - 5.6 - 8 - 11 - 32
Focal: : 17 - 28 - 35 - 50
Focal: : 17 - 24 - 35 - 50

in EV

in EV
Focal: : 17 - 28 - 35 - 50
Focal: : 17 - 24 - 35 - 50
Aperture: 2.8 - 4 - 5.6 - 8 - 11 - 22
Aperture: 2.8 - 3.5 - 5.6 - 8 - 11 - 32

in micrometer