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  Test # 2056 
 
Lens Distortion Test

Minolta 28-70 2.8G

Distortion at 28mm.
 
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_4000Minolta 28-70mm. F2.8  
F:8.0, S:1/1250, ISO:100    
Photo by Sinan Ozturk 
    EXIF    
Sony A55     Camera    
Minolta 28-70mm. F2.8     Lens    
8.0     Aperture    
1/1250     Shutter    
100     ISO    
167     Brightness    
0     Contrast    
0     Saturation    
0     Sharpness    
28 mm.     Focal Length    
42 mm.     Foc.Len.FF eq    
28 mm.     Foc.Len.APS-C    
Standard     Scene Mode    
Daylight     White Balance    
0.05 Mb.   Filesize    
1080 x 714 [0 MP.]   Dimensions    
 
  Test Photo # 2  
Photo_3999Minolta 28-70mm. F2.8  
F:8.0, S:1/1250, ISO:100    
Photo by Sinan Ozturk 
    EXIF    
Sony A55     Camera    
Minolta 28-70mm. F2.8     Lens    
8.0     Aperture    
1/1250     Shutter    
100     ISO    
166     Brightness    
0     Contrast    
0     Saturation    
0     Sharpness    
28 mm.     Focal Length    
42 mm.     Foc.Len.FF eq    
28 mm.     Foc.Len.APS-C    
Standard     Scene Mode    
Daylight     White Balance    
0.08 Mb.   Filesize    
1080 x 711 [0 MP.]   Dimensions    
 
  Test Photo # 3  
Photo_3998Minolta 28-70mm. F2.8  
F:8.0, S:1/1250, ISO:100    
Photo by Sinan Ozturk 
    EXIF    
Sony A55     Camera    
Minolta 28-70mm. F2.8     Lens    
8.0     Aperture    
1/1250     Shutter    
100     ISO    
151     Brightness    
0     Contrast    
0     Saturation    
0     Sharpness    
28 mm.     Focal Length    
42 mm.     Foc.Len.FF eq    
28 mm.     Foc.Len.APS-C    
Standard     Scene Mode    
Daylight     White Balance    
0.11 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

 

 

Related Comparisons
Carl Zeiss 24-70 F2.8 ZA SSM (at 24mm.)Carl Zeiss 24-70 F2.8 ZA SSM (at 70mm.)Carl Zeiss Jena MC Flektogan 35mm F2.4 (at 35mm.)
Carl Zeiss Jena Pancolar 50mm  F1.8 (at 50mm.)Cosina 19-35mm F3.5-F4.5 (at 26mm.)Cosina 19-35mm F3.5-F4.5 (at 35mm.)
Minolta 24mm F2.8 (at 28mm.)Minolta 28-70mm. F2.8 (at 28mm.)Minolta 28-70mm. F2.8 (at 50mm.)
Minolta 28mm. F2.8 (at 28mm.)Minolta 35-80mm F/4-5.6 (at 35mm.)Minolta 35-80mm F/4-5.6 (at 75mm.)
Minolta 50mm F/1.4 (at 50mm.)Samsung 10mm f3.5 (fisheye) (at 10mm.)Samsung 18-55mm OIS F/3.5-5.6 (at 18mm.)
Samsung 18-55mm OIS F/3.5-5.6 (at 50mm.)Sigma 10-20mm. F/4-5.6 (at 11mm.)Sigma 10-20mm. F/4-5.6 (at 20mm.)
Sigma 12-24 F4.5-5.6 DG (at 12mm.)Sigma 12-24 F4.5-5.6 DG (at 24mm.)Sigma 17-70 F/2.8-4 DS Macro HSM (at 17mm.)
Sigma 17-70 F/2.8-4 DS Macro HSM (at 50mm.)Sony 16-105 F3.5-5.6 DT (at 16mm.)Sony 16-105 F3.5-5.6 DT (at 50mm.)
Sony 16-50 DT F2.8 SAM (at 16mm.)Sony 16-50 DT F2.8 SAM (at 50mm.)Sony 18-55 F3.5-5.6 SAM (at 18mm.)
Sony 18-55 F3.5-5.6 SAM (at 50mm.)Sony 35mm DT F/1.8 SAM (at 35mm.)Sony 50mm F1.8 SAM DT (at 50mm.)
Sony RX100 mk2's Lens (at 10mm.)Sony SEL PZ 16-50 F/3.5-5.6 OSS (at 16mm.)Sony SEL PZ 16-50 F/3.5-5.6 OSS (at 50mm.)
Tamron 17-50 F/2.8 (at 17mm.)Tamron 17-50 F/2.8 (at 50mm.)Tamron 18-200 F3.5-6.3 (at 18mm.)
Tamron 18-200 F3.5-6.3 (at 50mm.)Tokina 11-16mm f2.8 (at 11mm.)Tokina 11-16mm f2.8 (at 16mm.)
Tokina 28-70mm. F2.8 (at 28mm.)Tokina 28-70mm. F2.8 (at 35mm.)Tokina 28-70mm. F2.8 (at 55mm.)

 

  Other Minolta 28-70mm. F2.8 vs. Comparisons  
Minolta 28-70 2.8 (on Full Frame Camera)
at 70mm.
Tested Apertures Between F2.8 to F13.0
Minolta 28-70 2.8G
Distortion at 50mm.
Minolta 28-70 2.8G
at 70mm.
Tested Apertures Between F2.8 to F13.0
Minolta 28-70 2.8G
at 50mm.
Tested Apertures Between F2.8 to F13.0
Minolta 28-70mm. F2.8 G Lens Video Auto Focus Performance
at 28-70mm.
Auto Focus Noise (Sound), AF Speed and Focus Hunting Test (in Silent Environment)
  Other Comparisons of Minolta 28-70mm. F2.8  
Minolta 28-70 2.8 vs. Minolta 35-105mm.
Sharpness at 60mm.
Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8, F10, F13, F16
Minolta 28-70 2.8 vs. Carl Zeiss 24-70
Sharpness at 60mm.
Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F10, F13, F16
Minolta 28-70 2.8 vs. Carl Zeiss 24-70
Sharpness at 50mm.
Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F10, F13, F16
Minolta 50mm. 2.8 vs. Minolta 28-70 2.8
Sharpness at 50mm.
Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F7.1, F8, F10, F13, F16
Minolta 35-105mm. vs. Minolta 28-70 2.8
Sharpness at 50mm.
Tested Apertures F2.8/F4.5, F3.5/F4.5, F4/F4.5, F4.5, F5, F5.6, F6.3, F7.1, F8, F10, F13, F16
Carl Zeiss 24-70 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, F10, F13, F16
Minolta 35-105mm. vs. Minolta 28-70 2.8
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, F10, F13, F16
Carl Zeiss 24-70 vs. Minolta 28-70 2.8
Sharpness at 28mm.
Tested Apertures F2.8, F3.5, F4, F4.5, F5, F5.6, F6.3, F8, F10, F13, F16
Minolta 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
Minolta 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
Minolta 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
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
Minolta 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
Minolta 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
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
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. Minolta 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. Minolta 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