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  Comparison # 2885 
  
Lens Sharpness Comparison

Sigma 12-24 vs. Vivitar 13mm 2.8
Sharpness at 13mm.
Tested Apertures F2.8/F4.5, F4/F4.5, F5.6, F8, F11, F16, F22
 
Comparison by Sinan Ozturk   
  
  
  Comparison Photo # 1  
Photo_5820Vivitar 13mm. F2.8  
against
Photo_5827 Sigma 12-24 F4.5-5.6 DG
F2.8 1/1250 100 13mm.    
  F4.5 1/640100 15mm.  
Photo by Sinan Ozturk  Photo by Sinan Ozturk 
100% (1:1) Crop Samples
Vivitar 13mm. F2.8
Center
F/2.8
Brightness 65
8% Brighter
Vivitar 13mm. F2.8
Between Center and Right Border
F/2.8
Brightness 105
12% Brighter
Vivitar 13mm. F2.8
Border (Left)
F/2.8
Brightness 39
(Almost Same)
Vivitar 13mm. F2.8
vignetting
F/2.8
Brightness 65
(Almost Same)
Sigma 12-24 F4.5-5.6 DG
Center
F/4.5
Brightness 44
8% Darker
Sigma 12-24 F4.5-5.6 DG
Between Center and Right Border
F/4.5
Brightness 75
12% Darker
Sigma 12-24 F4.5-5.6 DG
Border (Left)
F/4.5
Brightness 28
(Almost Same)
Sigma 12-24 F4.5-5.6 DG
vignetting
F/4.5
Brightness 53
(Almost Same)
Display crops in Black & White
  EXIF  
 
  Comparison Photo # 2  
Photo_5821Vivitar 13mm. F2.8  
against
Photo_5827 Sigma 12-24 F4.5-5.6 DG
F4 1/1000 100 13mm.    
  F4.5 1/640100 15mm.  
100% (1:1) Crop Samples
Vivitar 13mm. F2.8
Center
F/4
Brightness 53
(Almost Same)
Vivitar 13mm. F2.8
Between Center and Right Border
F/4
Brightness 103
11% Brighter
Vivitar 13mm. F2.8
Border (Left)
F/4
Brightness 45
7% Brighter
Vivitar 13mm. F2.8
vignetting
F/4
Brightness 80
10% Brighter
Sigma 12-24 F4.5-5.6 DG
Center
F/4.5
Brightness 44
(Almost Same)
Sigma 12-24 F4.5-5.6 DG
Between Center and Right Border
F/4.5
Brightness 75
11% Darker
Sigma 12-24 F4.5-5.6 DG
Border (Left)
F/4.5
Brightness 28
7% Darker
Sigma 12-24 F4.5-5.6 DG
vignetting
F/4.5
Brightness 53
10% Darker
Display crops in Black & White
  EXIF  
 
  Comparison Photo # 3  
Photo_5822Vivitar 13mm. F2.8  
against
Photo_5828 Sigma 12-24 F4.5-5.6 DG
F5.6 1/500 100 13mm.    
  F5.6 1/500100 15mm.  
100% (1:1) Crop Samples
Vivitar 13mm. F2.8
Center
F/5.6
Brightness 50
(Almost Same)
Vivitar 13mm. F2.8
Between Center and Right Border
F/5.6
Brightness 99
8% Brighter
Vivitar 13mm. F2.8
Border (Left)
F/5.6
Brightness 51
8% Brighter
Vivitar 13mm. F2.8
vignetting
F/5.6
Brightness 100
16% Brighter
Sigma 12-24 F4.5-5.6 DG
Center
F/5.6
Brightness 42
(Almost Same)
Sigma 12-24 F4.5-5.6 DG
Between Center and Right Border
F/5.6
Brightness 79
8% Darker
Sigma 12-24 F4.5-5.6 DG
Border (Left)
F/5.6
Brightness 31
8% Darker
Sigma 12-24 F4.5-5.6 DG
vignetting
F/5.6
Brightness 58
16% Darker
Display crops in Black & White
  EXIF  
 
  Comparison Photo # 4  
Photo_5823Vivitar 13mm. F2.8  
against
Photo_5829 Sigma 12-24 F4.5-5.6 DG
F8 1/250 100 13mm.    
  F8.0 1/250100 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 Center, Between Center and Right Border, Border (Left), vignetting
  EXIF  
 
  Comparison Photo # 5  
Photo_5824Vivitar 13mm. F2.8  
against
Photo_5830 Sigma 12-24 F4.5-5.6 DG
F11 1/125 100 13mm.    
  F11.0 1/125100 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 Center, Between Center and Right Border, Border (Left), vignetting
  EXIF  
 
  Comparison Photo # 6  
Photo_5825Vivitar 13mm. F2.8  
against
Photo_5831 Sigma 12-24 F4.5-5.6 DG
F16 1/60 100 13mm.    
  F16.0 1/60100 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 Center, Between Center and Right Border, Border (Left), vignetting
  EXIF  
 
  Comparison Photo # 7  
Photo_5826Vivitar 13mm. F2.8  
against
Photo_5832 Sigma 12-24 F4.5-5.6 DG
F22 1/30 100 13mm.    
  F22.0 1/30100 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 Center, Between Center and Right Border, Border (Left), vignetting
  EXIF  
 
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  Other Sigma 12-24 F4.5-5.6 DG vs. Vivitar 13mm. F2.8 Comparisons  
Sigma 12-24 vs. Vivitar 13mm 2.8
Sharpness at 13mm.
Tested Apertures F2.8/F4.5, F4/F4.5, F5.6, F8, F11, F16, F22
Sigma 12-24 vs. Vivitar 13mm 2.8
Sharpness at 13mm.
Tested Apertures F2.8/F4.5, F4/F4.5, F5.6, F8, F11, F16, F22
Sigma 12-24 vs. Vivitar 13mm 2.8
Sharpness at 13mm.
Tested Apertures F2.8/F5, F4/F5, F5.6, F8, F11, F16, F22
  Other Comparisons of Sigma 12-24 F4.5-5.6 DG  
Sigma 12-24 vs. Sigma 10-20 F4-5.6
Sharpness at 13mm.
Tested Apertures F4.5, F5.6, F8, F11, F16, F22
Sigma 10-20 F4-5.6 vs. Sigma 12-24
Sharpness at 12mm.
Tested Apertures F4.5, F8, F16
Sigma 12-24 vs. Sigma 10-20 F4-5.6
Sharpness at 13mm.
Tested Apertures F5, F5.6, F8, F11, F16, F16/F22
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
Sigma 12-24 F4.5-5.6 DG Video Auto Focus Performance
at 12-24mm.
Auto Focus Noise (Sound), AF Speed and Focus Hunting Test (in Silent Enviroment)
Sigma 10-20 F4-5.6 vs. Sigma 12-24
Sharpness at 17mm.
Tested Apertures F5/F5.6, F5.6, F6.3
Sony 18-55 vs. Sigma 12-24
Sharpness at 17-18mm.
Tested Apertures F3.5/F5.6, F4.5/F5.6, F5.6, F6.3
Tamron 18-200 vs. Sigma 12-24
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
Tamron 17-50 vs. Sigma 12-24
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
Carl Zeiss 24-70 vs. Sigma 12-24
Sharpness at 24mm.
Tested Apertures F2.8/F5.6, F5.6, F8, F16, F16
  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
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
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