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  Test # 57 
  
Lens Sharpness Test

Sigma 10-20 F4-5.6

Sharpness at 20mm.
Tested Apertures F5.6/F8, F8/F11, F8/F16
 
Test by Sinan Ozturk   
20mm is the narrowest focal length of Sigma 10-20 F4-5.6 lens.



At this focal length, Sigma can go as wide as F5.6 and first photo is the comparison of F5.6 with F8.



In the second photo F11 and in the third photo F16 is compared to F8.



Unfortunately 20mm is not the strong suit of Sigma 10-20 Lens. Especially corner sharpness is very weak in 20mm regardless of the aperture. Its best performance in corners is F16 for 20mm but even at F16 corners are too blurry.



You can use custom comparison box at the end of the page to compare any photo against another one. (Eg. F16 against F5.6)             [Review by Sinan Ozturk]
  
  
  Comparison Photo # 1  
Photo_151Sigma 10-20mm. F/4-5.6  
against
Photo_150 Sigma 10-20mm. F/4-5.6
F5.6 1/500 100 20mm.    
  F8.0 1/250100 20mm.  
Photo by Sinan Ozturk  Photo by Sinan Ozturk 
100% (1:1) Crop Samples
Sigma 10-20mm. F/4-5.6

F/5.6
Brightness 141
7% Darker
Sigma 10-20mm. F/4-5.6
Border (Left)
F/5.6
Brightness 146
9% Darker
Sigma 10-20mm. F/4-5.6
Border (Right)
F/5.6
Brightness 38
(Almost Same)
Sigma 10-20mm. F/4-5.6

F/8.0
Brightness 157
7% Brighter
Sigma 10-20mm. F/4-5.6
Border (Left)
F/8.0
Brightness 169
9% Brighter
Sigma 10-20mm. F/4-5.6
Border (Right)
F/8.0
Brightness 48
(Almost Same)
Display crops in Black & White
  EXIF  
 
  Comparison Photo # 2  
Photo_149Sigma 10-20mm. F/4-5.6  
against
Photo_150 Sigma 10-20mm. F/4-5.6
F11.0 1/125 100 20mm.    
  F8.0 1/250100 20mm.  
100% (1:1) Crop Samples
Sigma 10-20mm. F/4-5.6

F/11.0
Brightness 168
(Almost Same)
Sigma 10-20mm. F/4-5.6
Border (Left)
F/11.0
Brightness 182
5% Brighter
Sigma 10-20mm. F/4-5.6
Border (Right)
F/11.0
Brightness 60
5% Brighter
Sigma 10-20mm. F/4-5.6

F/8.0
Brightness 157
(Almost Same)
Sigma 10-20mm. F/4-5.6
Border (Left)
F/8.0
Brightness 169
5% Darker
Sigma 10-20mm. F/4-5.6
Border (Right)
F/8.0
Brightness 48
5% Darker
Display crops in Black & White
  EXIF  
 
  Comparison Photo # 3  
Photo_148Sigma 10-20mm. F/4-5.6  
against
Photo_150 Sigma 10-20mm. F/4-5.6
F16.0 1/60 100 20mm.    
  F8.0 1/250100 20mm.  
100% (1:1) Crop Samples
Sigma 10-20mm. F/4-5.6

F/16.0
Brightness 168
(Almost Same)
Sigma 10-20mm. F/4-5.6
Border (Left)
F/16.0
Brightness 193
10% Brighter
Sigma 10-20mm. F/4-5.6
Border (Right)
F/16.0
Brightness 63
6% Brighter
Sigma 10-20mm. F/4-5.6

F/8.0
Brightness 157
(Almost Same)
Sigma 10-20mm. F/4-5.6
Border (Left)
F/8.0
Brightness 169
10% Darker
Sigma 10-20mm. F/4-5.6
Border (Right)
F/8.0
Brightness 48
6% Darker
Display crops in Black & White
  EXIF  
 
Custom Comparison
You can enter 2 photo names from above to compare them side by side:
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Related Comparisons
Tokina 11-16 vs. Sigma 10-20 F4-5.6
at 10-16mm.
Sigma 10mm vs. Tokina 11mm & Sigma 20mm vs. Tokina 16mm - Point of view comparison
Sigma 10-20 F4-5.6
Sharpness at 10mm.
Tested Apertures F4/F11, F5.6/F11, F8/F11, F11/F16
  

 

  Other Sigma 10-20mm. F/4-5.6 vs. Comparisons  
Sigma 10-20 F4-5.6 Sharpness Test at 20mm.
at 20mm.
Tested Apertures Between F5.6 to F13.0
Sigma 10-20 F4-5.6 Sharpness Test at 10mm.
at 10mm.
Tested Apertures Between F4.0 to F13.0
Sigma 10-20mm.F/4-5.6 Distortion Test
Distortion at 20mm.
Sigma 10-20mm.F/4-5.6 Distortion Test
Distortion at 11mm.
  Other Comparisons of Sigma 10-20mm. F/4-5.6  
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 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 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.
Tested Apertures F5, F5.6, F8, F11, F16, F16/F22
Sigma 10-20 F4-5.6 vs. Samsung 18-55
Sharpness at 18mm.
Tested Apertures F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F8, F10
Sigma 10-20 F4-5.6 vs. Sony E.16-50
Sharpness at 18mm.
Tested Apertures F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F8, F10
Sony 18-200 vs. Sigma 10-20 F4-5.6
Sharpness at 18mm.
Tested Apertures F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F8, F10
Tamron 18-200 vs. Sigma 10-20 F4-5.6
Sharpness at 18mm.
Tested Apertures F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F8, F10
Tamron 17-50 vs. Sigma 10-20 F4-5.6
Sharpness at 18mm.
Tested Apertures F2.8/F5.6, F3.2/F5.6, F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F8, F10
Sony 16-105 vs. Sigma 10-20 F4-5.6
Sharpness at 18mm.
Tested Apertures F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F8, F10
Sony 16-50 vs. Sigma 10-20 F4-5.6
Sharpness at 18mm.
Tested Apertures F2.8/F5.6, F3.2/F5.6, F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F8, F10
Sony 18-55 vs. Sigma 10-20 F4-5.6
Sharpness at 18mm.
Tested Apertures F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F8, F10
Sigma 10-20 F4-5.6 vs. Sony E.16-50
Sharpness at 16mm.
Tested Apertures F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F8
Sigma 10-20 F4-5.6 vs. Sony 16-50
Sharpness at 16mm.
Tested Apertures F2.8/F5, F3.2/F5, F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F8
Sigma 10-20 F4-5.6 vs. Sony 16-105
Sharpness at 16mm.
Tested Apertures F3.5/F5, F4/F5, F4.5/F5, F5, F5.6, F6.3, F8
Sigma 10-20 vs. Sigma 12-24
at 10-12mm.
Wide Angle Video Shot
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 10-20 F4-5.6
Sharpness at 17-18mm.
Tested Apertures F3.5/F5, F4.5/F5, F5.6, F6.3
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