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  Test # 381 
 
Lens Distortion Test

Tamron 18-200 Distortion Test

Distortion at 18mm.
 
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 Tamron 18-200's Barrel Distortion with other lenses.
  
  
  Test Photo # 1  
Photo_642Tamron 18-200 F3.5-6.3  
F:11.0, S:1/400, ISO:100    
Photo by Sinan Ozturk 
    EXIF    
Sony A35     Camera    
Tamron 18-200 F3.5-6.3     Lens    
11.0     Aperture    
1/400     Shutter    
100     ISO    
172     Brightness    
18 mm.     Focal Length    
27 mm.     Foc.Len.FF eq    
18 mm.     Foc.Len.APS-C    
0.81 Mb.   Filesize    
1658 x 1080 [1 MP.]   Dimensions    
 
  Test Photo # 2  
Photo_643Tamron 18-200 F3.5-6.3  
F:11.0, S:1/250, ISO:100    
Photo by Sinan Ozturk 
    EXIF    
Sony A35     Camera    
Tamron 18-200 F3.5-6.3     Lens    
11.0     Aperture    
1/250     Shutter    
100     ISO    
173     Brightness    
18 mm.     Focal Length    
27 mm.     Foc.Len.FF eq    
18 mm.     Foc.Len.APS-C    
1.12 Mb.   Filesize    
1645 x 1080 [1 MP.]   Dimensions    
 
  Test Photo # 3  
Photo_644Tamron 18-200 F3.5-6.3  
F:11.0, S:1/200, ISO:100    
Photo by Sinan Ozturk 
    EXIF    
Sony A35     Camera    
Tamron 18-200 F3.5-6.3     Lens    
11.0     Aperture    
1/200     Shutter    
100     ISO    
171     Brightness    
18 mm.     Focal Length    
27 mm.     Foc.Len.FF eq    
18 mm.     Foc.Len.APS-C    
1.32 Mb.   Filesize    
1638 x 1080 [1 MP.]   Dimensions    
 
Barrel Distortion Comparison
You can select 2 lens to compare their barrel distortions side by side:
against

 

 

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  Other Tamron 18-200 F3.5-6.3 vs. Comparisons  
Tamron 18-200 Sharpness Test at 200mm.
at 200mm.
Tested Apertures Between F6.3 to F13.0
Tamron 18-200 Sharpness Test at 24mm.
at 24mm.
Tested Apertures Between F4.0 to F13.0
Tamron 18-200 Video Auto Focus Performance
at 18-200mm.
Auto Focus Noise (Sound), AF Speed and Focus Hunting Test (in Silent Enviroment)
Tamron 18-200 Distortion Test
Distortion at 50mm.
  Other Comparisons of Tamron 18-200 F3.5-6.3  
Tamron 18-200 vs. Sony 16-105
Sharpness at 70mm.
Tested Apertures F5.6, F6.3, F7.1, F8
Tamron 18-200 vs. Minolta 28-105
Sharpness at 70mm.
Tested Apertures F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8
Tamron 18-200 vs. Minolta 35-105mm.
Sharpness at 70mm.
Tested Apertures F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8
Sigma 17-70 vs. Tamron 18-200
Sharpness at 70mm.
Tested Apertures F4/F5.6, F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8
Minolta 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. 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
Tamron 18-200 vs. Minolta 28-105
Sharpness at 105mm.
Tested Apertures F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8
Tamron 18-200 vs. Minolta 35-105mm.
Sharpness at 105mm.
Tested Apertures F4.5/F5.6, F5/F5.6, F5.6, F6.3, F7.1, F8
Sony 16-105 vs. Tamron 18-200
Sharpness at 105mm.
Tested Apertures F5.6, F6.3, F7.1, F8
Tamron 18-200 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
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. Tamron 18-200
Sharpness at 28mm.
Tested Apertures F2.8/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
Sony 16-105 vs. Tamron 18-200
Sharpness at 28mm.
Tested Apertures F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1
Sigma 17-70 vs. Tamron 18-200
Sharpness at 28mm.
Tested Apertures F3.2/F4, F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
Sony 18-55 vs. Tamron 18-200
Sharpness at 28mm.
Tested Apertures F4/F4.5, 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
Tamron 17-50 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 28-105 vs. Tamron 18-200
Sharpness at 28mm.
Tested Apertures F3.5/F4, F4, F4.5, F5, F5.6, F6.3, F7.1
Tamron 18-200 vs. Minolta 35-105mm.
Sharpness at 35mm.
Tested Apertures F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8