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  Test # 535 
 
Lens Test

Sigma 17-70 Sharpness Test at 70mm.

at 70mm.
Tested Apertures Between F4.0 to F13.0
 
Test by Sinan Ozturk   
PhotoAgainst Photo Editor's Comment: In our official sharpness test we shoot chart that consists of 1 and 5 American Dolars. We take 3 crops from the very top left corner, center and between center and top left corner.

We shoot with every aperture from lens' widest aperture to F13. For zoom lenses we do the test for their both wide and tele focal lengths.

Unlike our other comparisons, these sharpness shots are taken in different times and lighting conditions might be different. So please consider only lenses' sharpness in these tests (we recommend analyzing black and white crops we provide) as contrast and color cast might not be very accurate in these comparisons. After reviewing the test, scroll to the bottom of the page to compare Sigma 17-70's Sharpness with other lenses.
  
  
  Comparison Photo # 1  
Photo_1118Sigma 17-70 F/2.8-4 DS Macro HSM  
against
Photo_1117 Sigma 17-70 F/2.8-4 DS Macro HSM
F4.5 1/5 100 70mm.    
  F4.0 1/6100 70mm.  
Photo by Sinan Ozturk  Photo by Sinan Ozturk 
100% (1:1) Crop Samples
Sigma 17-70 F/2.8-4 DS Macro HSM
Center
F/4.5
Brightness 132
(Almost Same)
Sigma 17-70 F/2.8-4 DS Macro HSM
Corner (Top Left)
F/4.5
Brightness 106
(Almost Same)
Sigma 17-70 F/2.8-4 DS Macro HSM
Between Center and Top Left Corner
F/4.5
Brightness 117
(Almost Same)
Sigma 17-70 F/2.8-4 DS Macro HSM
Center
F/4.0
Brightness 134
(Almost Same)
Sigma 17-70 F/2.8-4 DS Macro HSM
Corner (Top Left)
F/4.0
Brightness 96
(Almost Same)
Sigma 17-70 F/2.8-4 DS Macro HSM
Between Center and Top Left Corner
F/4.0
Brightness 114
(Almost Same)
Black & White crops are displayed for better details study.
Click here to switch back to colored crops.
  EXIF  
 
  Comparison Photo # 2  
Photo_1119Sigma 17-70 F/2.8-4 DS Macro HSM  
against
Photo_1117 Sigma 17-70 F/2.8-4 DS Macro HSM
F5.0 1/4 100 70mm.    
  F4.0 1/6100 70mm.  
100% (1:1) Crop Samples
Sigma 17-70 F/2.8-4 DS Macro HSM
Center
F/5.0
Brightness 137
(Almost Same)
Sigma 17-70 F/2.8-4 DS Macro HSM
Corner (Top Left)
F/5.0
Brightness 115
7% Brighter
Sigma 17-70 F/2.8-4 DS Macro HSM
Between Center and Top Left Corner
F/5.0
Brightness 124
(Almost Same)
Sigma 17-70 F/2.8-4 DS Macro HSM
Center
F/4.0
Brightness 134
(Almost Same)
Sigma 17-70 F/2.8-4 DS Macro HSM
Corner (Top Left)
F/4.0
Brightness 96
7% Darker
Sigma 17-70 F/2.8-4 DS Macro HSM
Between Center and Top Left Corner
F/4.0
Brightness 114
(Almost Same)
Black & White crops are displayed for better details study.
Click here to switch back to colored crops.
  EXIF  
 
  Comparison Photo # 3  
Photo_1120Sigma 17-70 F/2.8-4 DS Macro HSM  
against
Photo_1117 Sigma 17-70 F/2.8-4 DS Macro HSM
F5.6 1/3 100 70mm.    
  F4.0 1/6100 70mm.  
100% (1:1) Crop Samples
Sigma 17-70 F/2.8-4 DS Macro HSM
Center
F/5.6
Brightness 143
(Almost Same)
Sigma 17-70 F/2.8-4 DS Macro HSM
Corner (Top Left)
F/5.6
Brightness 126
11% Brighter
Sigma 17-70 F/2.8-4 DS Macro HSM
Between Center and Top Left Corner
F/5.6
Brightness 131
6% Brighter
Sigma 17-70 F/2.8-4 DS Macro HSM
Center
F/4.0
Brightness 134
(Almost Same)
Sigma 17-70 F/2.8-4 DS Macro HSM
Corner (Top Left)
F/4.0
Brightness 96
11% Darker
Sigma 17-70 F/2.8-4 DS Macro HSM
Between Center and Top Left Corner
F/4.0
Brightness 114
6% Darker
Black & White crops are displayed for better details study.
Click here to switch back to colored crops.
  EXIF  
 
  Comparison Photo # 4  
Photo_1121Sigma 17-70 F/2.8-4 DS Macro HSM  
against
Photo_1117 Sigma 17-70 F/2.8-4 DS Macro HSM
F6.3 4/10 100 70mm.    
  F4.0 1/6100 70mm.  
100% (1:1) Crop Samples
Login or Register to display 3 crops from Sigma 17-70 F/2.8-4 DS Macro HSM F/6.3 vs. Sigma 17-70 F/2.8-4 DS Macro HSM F/4.0 for locations Center, Corner (Top Left), Between Center and Top Left Corner
  EXIF  
 
  Comparison Photo # 5  
Photo_1122Sigma 17-70 F/2.8-4 DS Macro HSM  
against
Photo_1117 Sigma 17-70 F/2.8-4 DS Macro HSM
F7.1 5/10 100 70mm.    
  F4.0 1/6100 70mm.  
100% (1:1) Crop Samples
Login or Register to display 3 crops from Sigma 17-70 F/2.8-4 DS Macro HSM F/7.1 vs. Sigma 17-70 F/2.8-4 DS Macro HSM F/4.0 for locations Center, Corner (Top Left), Between Center and Top Left Corner
  EXIF  
 
  Comparison Photo # 6  
Photo_1123Sigma 17-70 F/2.8-4 DS Macro HSM  
against
Photo_1117 Sigma 17-70 F/2.8-4 DS Macro HSM
F8.0 6/10 100 70mm.    
  F4.0 1/6100 70mm.  
100% (1:1) Crop Samples
Login or Register to display 3 crops from Sigma 17-70 F/2.8-4 DS Macro HSM F/8.0 vs. Sigma 17-70 F/2.8-4 DS Macro HSM F/4.0 for locations Center, Corner (Top Left), Between Center and Top Left Corner
  EXIF  
 
  Comparison Photo # 7  
Photo_1124Sigma 17-70 F/2.8-4 DS Macro HSM  
against
Photo_1117 Sigma 17-70 F/2.8-4 DS Macro HSM
F9.0 8/10 100 70mm.    
  F4.0 1/6100 70mm.  
100% (1:1) Crop Samples
Login or Register to display 3 crops from Sigma 17-70 F/2.8-4 DS Macro HSM F/9.0 vs. Sigma 17-70 F/2.8-4 DS Macro HSM F/4.0 for locations Center, Corner (Top Left), Between Center and Top Left Corner
  EXIF  
 
  Comparison Photo # 8  
Photo_1125Sigma 17-70 F/2.8-4 DS Macro HSM  
against
Photo_1117 Sigma 17-70 F/2.8-4 DS Macro HSM
F11.0 13/10 100 70mm.    
  F4.0 1/6100 70mm.  
100% (1:1) Crop Samples
Login or Register to display 3 crops from Sigma 17-70 F/2.8-4 DS Macro HSM F/11.0 vs. Sigma 17-70 F/2.8-4 DS Macro HSM F/4.0 for locations Center, Corner (Top Left), Between Center and Top Left Corner
  EXIF  
 
  Comparison Photo # 9  
Photo_1126Sigma 17-70 F/2.8-4 DS Macro HSM  
against
Photo_1117 Sigma 17-70 F/2.8-4 DS Macro HSM
F13.0 16/10 100 70mm.    
  F4.0 1/6100 70mm.  
100% (1:1) Crop Samples
Login or Register to display 3 crops from Sigma 17-70 F/2.8-4 DS Macro HSM F/13.0 vs. Sigma 17-70 F/2.8-4 DS Macro HSM F/4.0 for locations Center, Corner (Top Left), Between Center and Top Left Corner
  EXIF  
 
PhotoAgainstPhoto.com Official Sharpness Test
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  Other Sigma 17-70 F/2.8-4 DS Macro HSM vs. Comparisons  
Sigma 17-70 Sharpness Test at 17mm.
at 17mm.
Tested Apertures Between F2.8 to F13.0
Sigma 17-70 F/2.8 - F4 Video Auto Focus Performance
at 17-70mm.
Auto Focus Noise (Sound), AF Speed and Focus Hunting Test (in Silent Enviroment)
Sigma 17-70 Distortion Test
Distortion at 50mm.
Sigma 17-70 Distortion Test
Distortion at 17mm.
Sigma 17-70 F.2.8-4
Sharpness at 50mm.
Tested Apertures F4/F8
Sigma 17-70
Sharpness at 70mm.
Tested Apertures F4/F8, F4/F5.6, F5.6/F8
  Other Comparisons of Sigma 17-70 F/2.8-4 DS Macro HSM  
Sigma 17-70 vs. Sony 16-105
Sharpness at 70mm.
Tested Apertures F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8
Sigma 17-70 vs. Minolta 28-105
Sharpness at 70mm.
Tested Apertures F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
Sigma 17-70 vs. Minolta 35-105mm.
Sharpness at 70mm.
Tested Apertures F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
Sigma 17-70 vs. Tamron 18-200
Sharpness at 70mm.
Tested Apertures F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8
Minolta 28-70 2.8 vs. Sigma 17-70
Sharpness at 70mm.
Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
Tokina 28-70 2.8 vs. Sigma 17-70
Sharpness at 70mm.
Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
Sigma 17-70 vs. Sony 16-50
Sharpness at 28mm.
Tested Apertures F2.8/F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
Sigma 17-70 vs. Tamron 18-200
Sharpness at 28mm.
Tested Apertures F3.2/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
Sigma 17-70 vs. Tokina 28-70 2.8
Sharpness at 28mm.
Tested Apertures F2.8/F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
Sigma 17-70 vs. Minolta 28-70 2.8
Sharpness at 28mm.
Tested Apertures F2.8/F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
Sigma 17-70 vs. Sony 16-105
Sharpness at 28mm.
Tested Apertures F3.2/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1
Sony 18-55 vs. Sigma 17-70
Sharpness at 28mm.
Tested Apertures F3.2/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1
Cosina 19-35 vs. Sigma 17-70
Sharpness at 28mm.
Tested Apertures F3.2/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
Tamron 17-50 vs. Sigma 17-70
Sharpness at 28mm.
Tested Apertures F2.8/F3.2, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
Minolta 28-105 vs. Sigma 17-70
Sharpness at 28mm.
Tested Apertures F3.2/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
Sigma 17-70 vs. Minolta 35-105mm.
Sharpness at 35mm.
Tested Apertures F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
Sigma 17-70 vs. Minolta 28-105
Sharpness at 35mm.
Tested Apertures F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
Sigma 17-70 vs. Sony 35mm 1.8
Sharpness at 35mm.
Tested Apertures F1.8/F3.5, F2.8/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
Sigma 17-70 vs. Tamron 17-50
Sharpness at 35mm.
Tested Apertures F2.8/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8