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  Comparison # 2881 
  
Lens Sharpness Comparison

Sigma 12-24 vs. Vivitar 13mm 2.8
Sharpness at 13mm.
Tested Apertures F2.8/F5, F4/F5, F5.6, F8, F11, F16, F22
 
Comparison by Sinan Ozturk   
  
  
  Comparison Photo # 1  
Photo_5783Vivitar 13mm. F2.8  
against
Photo_5795 Sigma 12-24 F4.5-5.6 DG
F2.8 1/500 100 13mm.    
  F5.0 1/160100 15mm.  
Photo by Sinan Ozturk  Photo by Sinan Ozturk 
100% (1:1) Crop Samples
Vivitar 13mm. F2.8
Focus Point
F/2.8
Brightness 73
(Almost Same)
Vivitar 13mm. F2.8
Border (Bottom)
F/2.8
Brightness 186
5% Darker
Vivitar 13mm. F2.8
Center
F/2.8
Brightness 92
(Almost Same)
Vivitar 13mm. F2.8
Border (Left)
F/2.8
Brightness 110
6% Darker
Sigma 12-24 F4.5-5.6 DG
Focus Point
F/5.0
Brightness 81
(Almost Same)
Sigma 12-24 F4.5-5.6 DG
Border (Bottom)
F/5.0
Brightness 200
5% Brighter
Sigma 12-24 F4.5-5.6 DG
Center
F/5.0
Brightness 98
(Almost Same)
Sigma 12-24 F4.5-5.6 DG
Border (Left)
F/5.0
Brightness 124
6% Brighter
Black & White crops are displayed for better details study.
Click here to switch back to colored crops.
  EXIF  
 
  Comparison Photo # 2  
Photo_5784Vivitar 13mm. F2.8  
against
Photo_5795 Sigma 12-24 F4.5-5.6 DG
F4 1/400 100 13mm.    
  F5.0 1/160100 15mm.  
100% (1:1) Crop Samples
Vivitar 13mm. F2.8
Focus Point
F/4
Brightness 59
9% Darker
Vivitar 13mm. F2.8
Border (Bottom)
F/4
Brightness 183
6% Darker
Vivitar 13mm. F2.8
Center
F/4
Brightness 79
7% Darker
Vivitar 13mm. F2.8
Border (Left)
F/4
Brightness 112
5% Darker
Sigma 12-24 F4.5-5.6 DG
Focus Point
F/5.0
Brightness 81
9% Brighter
Sigma 12-24 F4.5-5.6 DG
Border (Bottom)
F/5.0
Brightness 200
6% Brighter
Sigma 12-24 F4.5-5.6 DG
Center
F/5.0
Brightness 98
7% Brighter
Sigma 12-24 F4.5-5.6 DG
Border (Left)
F/5.0
Brightness 124
5% Brighter
Black & White crops are displayed for better details study.
Click here to switch back to colored crops.
  EXIF  
 
  Comparison Photo # 3  
Photo_5785Vivitar 13mm. F2.8  
against
Photo_5796 Sigma 12-24 F4.5-5.6 DG
F5.6 1/200 100 13mm.    
  F5.6 1/125100 15mm.  
100% (1:1) Crop Samples
Vivitar 13mm. F2.8
Focus Point
F/5.6
Brightness 56
12% Darker
Vivitar 13mm. F2.8
Border (Bottom)
F/5.6
Brightness 176
13% Darker
Vivitar 13mm. F2.8
Center
F/5.6
Brightness 74
12% Darker
Vivitar 13mm. F2.8
Border (Left)
F/5.6
Brightness 107
11% Darker
Sigma 12-24 F4.5-5.6 DG
Focus Point
F/5.6
Brightness 87
12% Brighter
Sigma 12-24 F4.5-5.6 DG
Border (Bottom)
F/5.6
Brightness 209
13% Brighter
Sigma 12-24 F4.5-5.6 DG
Center
F/5.6
Brightness 105
12% Brighter
Sigma 12-24 F4.5-5.6 DG
Border (Left)
F/5.6
Brightness 135
11% Brighter
Black & White crops are displayed for better details study.
Click here to switch back to colored crops.
  EXIF  
 
  Comparison Photo # 4  
Photo_5786Vivitar 13mm. F2.8  
against
Photo_5797 Sigma 12-24 F4.5-5.6 DG
F8 1/100 100 13mm.    
  F8.0 1/60100 15mm.  
100% (1:1) Crop Samples
Login or Register to display 4 crops from Vivitar 13mm. F2.8 F/8 vs. Sigma 12-24 F4.5-5.6 DG F/8.0 for locations Focus Point, Border (Bottom), Center, Border (Left)
  EXIF  
 
  Comparison Photo # 5  
Photo_5787Vivitar 13mm. F2.8  
against
Photo_5798 Sigma 12-24 F4.5-5.6 DG
F11 1/60 100 13mm.    
  F11.0 1/30100 15mm.  
100% (1:1) Crop Samples
Login or Register to display 4 crops from Vivitar 13mm. F2.8 F/11 vs. Sigma 12-24 F4.5-5.6 DG F/11.0 for locations Focus Point, Border (Bottom), Center, Border (Left)
  EXIF  
 
  Comparison Photo # 6  
Photo_5788Vivitar 13mm. F2.8  
against
Photo_5799 Sigma 12-24 F4.5-5.6 DG
F16 1/30 100 13mm.    
  F16.0 1/15100 15mm.  
100% (1:1) Crop Samples
Login or Register to display 4 crops from Vivitar 13mm. F2.8 F/16 vs. Sigma 12-24 F4.5-5.6 DG F/16.0 for locations Focus Point, Border (Bottom), Center, Border (Left)
  EXIF  
 
  Comparison Photo # 7  
Photo_5789Vivitar 13mm. F2.8  
against
Photo_5800 Sigma 12-24 F4.5-5.6 DG
F22 1/20 100 13mm.    
  F22.0 1/8100 15mm.  
100% (1:1) Crop Samples
Login or Register to display 4 crops from Vivitar 13mm. F2.8 F/22 vs. Sigma 12-24 F4.5-5.6 DG F/22.0 for locations Focus Point, Border (Bottom), Center, Border (Left)
  EXIF  
 
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Sigma 10-20 F4-5.6 vs. Vivitar 13mm 2.8
Sharpness at 13mm.
Tested Apertures F2.8/F5, F4/F5, F5.6, F8, F11, F16, F16/F22
Sigma 12-24 vs. Sigma 10-20 F4-5.6
Sharpness at 13mm.
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  Other Sigma 12-24 F4.5-5.6 DG vs. Vivitar 13mm. F2.8 Comparisons  
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Sharpness at 13mm.
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Sharpness at 13mm.
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Sharpness at 13mm.
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Sharpness at 12mm.
Tested Apertures F4.5, F8, F16
Sigma 12-24 Sharpness Test at 24mm.
at 24mm.
Tested Apertures Between F5.6 to F13.0
Sigma 12-24 Sharpness Test at 12mm.
at 12mm.
Tested Apertures Between F4.5 to F13.0
Sigma 10-20 vs. Sigma 12-24
at 10-12mm.
Wide Angle Video Shot
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at 12-24mm.
Auto Focus Noise (Sound), AF Speed and Focus Hunting Test (in Silent Enviroment)
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Sharpness at 17mm.
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Sharpness at 17-18mm.
Tested Apertures F3.5/F5.6, F4.5/F5.6, F5.6, F6.3
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Sharpness at 17-18mm.
Tested Apertures F3.5/F5.6, F4.5/F5.6, F5.6, F6.3
Sony 16-50 vs. Sigma 12-24
Sharpness at 17mm.
Tested Apertures F2.8/F5.6, F4.5/F5.6, F5.6, F6.3
Sony 16-105 vs. Sigma 12-24
Sharpness at 16-17mm.
Tested Apertures F3.5/F5.6, F4.5/F5.6, F5.6, F6.3
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Sharpness at 17-18mm.
Tested Apertures F2.8/F5.6, F4.5/F5.6, F5.6, F6.3
Sigma 12-24 Distortion Test
Distortion at 12mm.
Sigma 12-24 Distortion Test
Distortion at 24mm.
Sigma 12-24 Video AF Performance
at 12-24mm.
Auto Focus Speed and Noise
Carl Zeiss 24-70 vs. Sigma 12-24
Sharpness at 24mm.
Tested Apertures F2.8/F5.6, F5.6, F8, F16, F13/F16
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Sharpness at 24mm.
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  Other Comparisons of Vivitar 13mm. F2.8  
Sigma 10-20 F4-5.6 vs. Vivitar 13mm 2.8
Sharpness at 13mm.
Tested Apertures F2.8/F4.5, F4/F4.5, F5.6, F8, F11, F16, F22
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