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  Test # 1211 
 
Lens Distortion Test

Tokina 28-70 2.8

Distortion at 35mm.
 
Test by Sinan Ozturk   
PhotoAgainst Photo Editor's Comment: Barrel Distortion is optical flaw of a lens which causes straight lines in the photo look slightly curved outwards. Its much more apparent in wider focal lengths and zoom lenses and gets worse in the bottom or top of the photo, rather than center. It becomes apparent when skyline is photographed so we do barrel distortion tests with a clear skyline shot.

In the first comparison, skyline in the very bottom of the photo because this is where barrel distortion is worse for any lens.

In the second shot skyline is in the very center of the image where barrel distortion's effect is the least apparent.

In the third shot, skyline is in the 1/3 or 2/3 of the photo (golden rule) where distortion is same for both.

Red line in the photos are added in post production to show where skyline would suppose to be if lens were flawless with no distortion. The closer the real skyline to the red line, the better the lens and more apart the skyline from the red line, worse distortion the lens has.

For more information about this distortion tests, please read our distortion test guidelines.

After reviewing the test, scroll to the bottom of the page to compare 's Barrel Distortion with other lenses.
  
  
  Test Photo # 1  
Photo_2775Tokina 28-70mm. F2.8  
F:4.5, S:1/125, ISO:200    
Photo by Sinan Ozturk 
    EXIF    
Sony A55     Camera    
Tokina 28-70mm. F2.8     Lens    
4.5     Aperture    
1/125     Shutter    
200     ISO    
141     Brightness    
0     Contrast    
0     Saturation    
0     Sharpness    
35 mm.     Focal Length    
52 mm.     Foc.Len.FF eq    
34 mm.     Foc.Len.APS-C    
Standard     Scene Mode    
Auto     White Balance    
0.10 Mb.   Filesize    
1080 x 716 [0 MP.]   Dimensions    
 
  Test Photo # 2  
Photo_2776Tokina 28-70mm. F2.8  
F:4.5, S:1/125, ISO:250    
Photo by Sinan Ozturk 
    EXIF    
Sony A55     Camera    
Tokina 28-70mm. F2.8     Lens    
4.5     Aperture    
1/125     Shutter    
250     ISO    
134     Brightness    
0     Contrast    
0     Saturation    
0     Sharpness    
35 mm.     Focal Length    
52 mm.     Foc.Len.FF eq    
34 mm.     Foc.Len.APS-C    
Standard     Scene Mode    
Auto     White Balance    
0.12 Mb.   Filesize    
1080 x 715 [0 MP.]   Dimensions    
 
  Test Photo # 3  
Photo_2777Tokina 28-70mm. F2.8  
F:4.5, S:1/125, ISO:320    
Photo by Sinan Ozturk 
    EXIF    
Sony A55     Camera    
Tokina 28-70mm. F2.8     Lens    
4.5     Aperture    
1/125     Shutter    
320     ISO    
138     Brightness    
0     Contrast    
0     Saturation    
0     Sharpness    
35 mm.     Focal Length    
52 mm.     Foc.Len.FF eq    
34 mm.     Foc.Len.APS-C    
Standard     Scene Mode    
Auto     White Balance    
0.15 Mb.   Filesize    
1080 x 717 [0 MP.]   Dimensions    
 
Barrel Distortion Comparison
You can select 2 lens to compare their barrel distortions side by side:
against

 

 

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  Other Tokina 28-70mm. F2.8 vs. Comparisons  
Tokina 28-70mm. F2.8 Lens Video Auto Focus Performance
at 28-70mm.
Auto Focus Noise (Sound), AF Speed and Focus Hunting Test (in Silent Environment)
Tokina 28-70 2.8
Distortion at 55mm.
Tokina 28-70 2.8
Distortion at 28mm.
Tokina 28-70 2.8 Sharpness Test at 70mm.
at 70mm.
Tested Apertures Between F2.8 to F13.0
Tokina 28-70 2.8 Sharpness Test at 35mm.
at 35mm.
Tested Apertures Between F2.8 to F13.0
  Other Comparisons of Tokina 28-70mm. F2.8  
Tokina 28-70 2.8 vs. Sony 16-105
Sharpness at 70mm.
Tested Apertures F2.8/F5.6, F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8
Tokina 28-70 2.8 vs. Minolta 28-105
Sharpness at 70mm.
Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
Tokina 28-70 2.8 vs. Minolta 35-105mm.
Sharpness at 70mm.
Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
Tokina 28-70 2.8 vs. Tamron 18-200
Sharpness at 70mm.
Tested Apertures F2.8/F5.6, F3.5/F5.6, F4/F5.6, F4.5/F5.6, F5/F5.6, 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
Tokina 28-70 2.8 vs. Minolta 28-70 2.8
Sharpness at 70mm.
Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
Tokina 28-70 2.8 vs. Sony 16-50
Sharpness at 28mm.
Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
Tokina 28-70 2.8 vs. Tamron 18-200
Sharpness at 28mm.
Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
Minolta 28-70 2.8 vs. Tokina 28-70 2.8
Sharpness at 28mm.
Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
Sony 16-105 vs. Tokina 28-70 2.8
Sharpness at 28mm.
Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, 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
Sony 18-55 vs. Tokina 28-70 2.8
Sharpness at 28mm.
Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1
Cosina 19-35 vs. Tokina 28-70 2.8
Sharpness at 28mm.
Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
Tamron 17-50 vs. Tokina 28-70 2.8
Sharpness at 28mm.
Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
Minolta 28-105 vs. Tokina 28-70 2.8
Sharpness at 28mm.
Tested Apertures F2.8/F3.5, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1
Tokina 28-70 2.8 vs. Minolta 35-105mm.
Sharpness at 35mm.
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. Minolta 28-105
Sharpness at 35mm.
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. Sony 35mm 1.8
Sharpness at 35mm.
Tested Apertures F1.8/F2.8, F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8
Tokina 28-70 2.8 vs. Tamron 17-50
Sharpness at 35mm.
Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8