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  Test # 1213 
 
Lens Distortion Test

Cosina 19-35

Distortion at 26mm.
 
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_2781Cosina 19-35mm F3.5-F4.5  
F:5.0, S:1/60, ISO:100    
Photo by Sinan Ozturk 
    EXIF    
Sony A55     Camera    
Cosina 19-35mm F3.5-F4.5     Lens    
5.0     Aperture    
1/60     Shutter    
100     ISO    
143     Brightness    
0     Contrast    
0     Saturation    
0     Sharpness    
26 mm.     Focal Length    
39 mm.     Foc.Len.FF eq    
26 mm.     Foc.Len.APS-C    
Standard     Scene Mode    
Auto     White Balance    
0.08 Mb.   Filesize    
1080 x 715 [0 MP.]   Dimensions    
 
  Test Photo # 2  
Photo_2782Cosina 19-35mm F3.5-F4.5  
F:5.0, S:1/50, ISO:100    
Photo by Sinan Ozturk 
    EXIF    
Sony A55     Camera    
Cosina 19-35mm F3.5-F4.5     Lens    
5.0     Aperture    
1/50     Shutter    
100     ISO    
145     Brightness    
0     Contrast    
0     Saturation    
0     Sharpness    
26 mm.     Focal Length    
39 mm.     Foc.Len.FF eq    
26 mm.     Foc.Len.APS-C    
Standard     Scene Mode    
Auto     White Balance    
0.12 Mb.   Filesize    
1080 x 718 [0 MP.]   Dimensions    
 
  Test Photo # 3  
Photo_2783Cosina 19-35mm F3.5-F4.5  
F:5.0, S:1/50, ISO:125    
Photo by Sinan Ozturk 
    EXIF    
Sony A55     Camera    
Cosina 19-35mm F3.5-F4.5     Lens    
5.0     Aperture    
1/50     Shutter    
125     ISO    
147     Brightness    
0     Contrast    
0     Saturation    
0     Sharpness    
26 mm.     Focal Length    
39 mm.     Foc.Len.FF eq    
26 mm.     Foc.Len.APS-C    
Standard     Scene Mode    
Auto     White Balance    
0.13 Mb.   Filesize    
1080 x 716 [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 Cosina 19-35mm F3.5-F4.5 vs. Comparisons  
Cosina 19-35mm Video Auto Focus Performance
at 19-35mm.
Auto Focus Noise (Sound), AF Speed and Focus Hunting Test (in Silent Environment)
Cosina 19-35
Distortion at 35mm.
Cosina 19-35 Sharpness Test at 35mm.
at 35mm.
Tested Apertures Between F4.0 to F13.0
Cosina 19-35 Sharpness Test at 22mm.
at 22mm.
Tested Apertures Between F4.0 to F13.0
  Other Comparisons of Cosina 19-35mm F3.5-F4.5  
Cosina 19-35 vs. Sony 16-50
Sharpness at 28mm.
Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
Cosina 19-35 vs. Tamron 18-200
Sharpness at 28mm.
Tested Apertures F4, 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
Cosina 19-35 vs. Minolta 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
Cosina 19-35 vs. Sony 16-105
Sharpness at 28mm.
Tested Apertures 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
Cosina 19-35 vs. Sony 18-55
Sharpness at 28mm.
Tested Apertures F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1
Tamron 17-50 vs. Cosina 19-35
Sharpness at 28mm.
Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
Minolta 28-105 vs. Cosina 19-35
Sharpness at 28mm.
Tested Apertures F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
Cosina 19-35 vs. Minolta 35-105mm.
Sharpness at 35mm.
Tested Apertures F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
Cosina 19-35 vs. Minolta 28-105
Sharpness at 35mm.
Tested Apertures F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
Cosina 19-35 vs. Sony 35mm 1.8
Sharpness at 35mm.
Tested Apertures F1.8/F4.5, F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
Cosina 19-35 vs. Tamron 17-50
Sharpness at 35mm.
Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
Sigma 17-70 vs. Cosina 19-35
Sharpness at 35mm.
Tested Apertures F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
Sony 16-50 vs. Cosina 19-35
Sharpness at 35mm.
Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
Sony 16-105 vs. Cosina 19-35
Sharpness at 35mm.
Tested Apertures F4.5/F5, F5, F5.6, F6.3, F7.1, F8
Minolta 28-70 2.8 vs. Cosina 19-35
Sharpness at 35mm.
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. Cosina 19-35
Sharpness at 35mm.
Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8
Sony 18-55 vs. Cosina 19-35
Sharpness at 35mm.
Tested Apertures F4.5, F5, F5.6, F6.3, F7.1, F8