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  Test # 1748 
  
Camera ISO Test

Sony A55 ISO Test
Tested ISOs: ISO100, ISO200, ISO400, ISO800, ISO1600, ISO3200, ISO6400, ISO12800
 
Test by Sinan Ozturk   
PhotoAgainst Photo Editor's Comment: In our official ISO test we shoot a chart that consists of 1 and 5 American Dolars. We take 6 crops from various sections of the chart to display details in different ISO.

For each camera we shoot a good quality lens in its sweat spot This is usually F8 for interchangeable lens cameras.

Unlike our other comparisons, these ISO shots are taken in different times and lighting conditions might be different. So please consider only ISOs in these tests (we recommend analyzing black and white crops we provide) as contrast and color cast might not be very accurate in these comparisons. After reviewing the test, scroll to the bottom of the page to compare Sony A55's ISO with other cameras.
  
  
  Comparison Photo # 1  
Photo_3548Sony A55 + Sigma 50mm F/2.8 DG Macro  
against
Photo_3547 Sony A55 + Sigma 50mm F/2.8 DG Macro
F8.0 1/30 200 50mm.    
  F8.0 1/5100 50mm.  
Photo by Sinan Ozturk  Photo by Sinan Ozturk 
100% (1:1) Crop Samples
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop1
ISO 200
Brightness 127
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop2
ISO 200
Brightness 121
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop3
ISO 200
Brightness 110
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop4
ISO 200
Brightness 101
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop5
ISO 200
Brightness 100
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop6
ISO 200
Brightness 121
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop1
ISO 100
Brightness 128
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop2
ISO 100
Brightness 119
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop3
ISO 100
Brightness 105
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop4
ISO 100
Brightness 102
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop5
ISO 100
Brightness 97
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop6
ISO 100
Brightness 116
(Almost Same)
Black & White crops are displayed for better details study.
Click here to switch back to colored crops.
  EXIF  
 
  Comparison Photo # 2  
Photo_3549Sony A55 + Sigma 50mm F/2.8 DG Macro  
against
Photo_3547 Sony A55 + Sigma 50mm F/2.8 DG Macro
F8.0 1/60 400 50mm.    
  F8.0 1/5100 50mm.  
100% (1:1) Crop Samples
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop1
ISO 400
Brightness 126
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop2
ISO 400
Brightness 118
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop3
ISO 400
Brightness 105
(Exactly Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop4
ISO 400
Brightness 100
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop5
ISO 400
Brightness 95
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop6
ISO 400
Brightness 113
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop1
ISO 100
Brightness 128
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop2
ISO 100
Brightness 119
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop3
ISO 100
Brightness 105
(Exactly Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop4
ISO 100
Brightness 102
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop5
ISO 100
Brightness 97
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop6
ISO 100
Brightness 116
(Almost Same)
Black & White crops are displayed for better details study.
Click here to switch back to colored crops.
  EXIF  
 
  Comparison Photo # 3  
Photo_3550Sony A55 + Sigma 50mm F/2.8 DG Macro  
against
Photo_3547 Sony A55 + Sigma 50mm F/2.8 DG Macro
F8.0 1/100 800 50mm.    
  F8.0 1/5100 50mm.  
100% (1:1) Crop Samples
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop1
ISO 800
Brightness 131
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop2
ISO 800
Brightness 122
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop3
ISO 800
Brightness 109
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop4
ISO 800
Brightness 104
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop5
ISO 800
Brightness 98
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop6
ISO 800
Brightness 117
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop1
ISO 100
Brightness 128
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop2
ISO 100
Brightness 119
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop3
ISO 100
Brightness 105
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop4
ISO 100
Brightness 102
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop5
ISO 100
Brightness 97
(Almost Same)
Sony A55 + Sigma 50mm F/2.8 DG Macro
Crop6
ISO 100
Brightness 116
(Almost Same)
Black & White crops are displayed for better details study.
Click here to switch back to colored crops.
  EXIF  
 
  Comparison Photo # 4  
Photo_3551Sony A55 + Sigma 50mm F/2.8 DG Macro  
against
Photo_3547 Sony A55 + Sigma 50mm F/2.8 DG Macro
F8.0 1/250 1600 50mm.    
  F8.0 1/5100 50mm.  
100% (1:1) Crop Samples
Login or Register to display 6 crops from Sony A55 + Sigma 50mm F/2.8 DG Macro ISO 1600 vs. Sony A55 + Sigma 50mm F/2.8 DG Macro ISO 100 for locations Crop1, Crop2, Crop3, Crop4, Crop5, Crop6
  EXIF  
 
  Comparison Photo # 5  
Photo_3552Sony A55 + Sigma 50mm F/2.8 DG Macro  
against
Photo_3547 Sony A55 + Sigma 50mm F/2.8 DG Macro
F8.0 1/320 3200 50mm.    
  F8.0 1/5100 50mm.  
100% (1:1) Crop Samples
Login or Register to display 6 crops from Sony A55 + Sigma 50mm F/2.8 DG Macro ISO 3200 vs. Sony A55 + Sigma 50mm F/2.8 DG Macro ISO 100 for locations Crop1, Crop2, Crop3, Crop4, Crop5, Crop6
  EXIF  
 
  Comparison Photo # 6  
Photo_3553Sony A55 + Sigma 50mm F/2.8 DG Macro  
against
Photo_3547 Sony A55 + Sigma 50mm F/2.8 DG Macro
F8.0 1/640 6400 50mm.    
  F8.0 1/5100 50mm.  
100% (1:1) Crop Samples
Login or Register to display 6 crops from Sony A55 + Sigma 50mm F/2.8 DG Macro ISO 6400 vs. Sony A55 + Sigma 50mm F/2.8 DG Macro ISO 100 for locations Crop1, Crop2, Crop3, Crop4, Crop5, Crop6