Nikon D3X vs Sony A77

Nikon D3X advantages over Sony A77

• Lens selection
  Excellent vs Good
  Better lens selection gives you more options
• Larger sensor
  35mm vs APS-C
  More sensor area. Bigger is (generally) better.
• Bigger pixels
  ~ 5.94 vs 3.95 microns
  Better low-light and dynamic range (all else equal)
• Fast startup
  ~0.30 vs 0.8 sec
  Faster startup lets you catch the moment
• Higher effective ISO

  Higher effective ISO

  Maximum effective ISO is an estimate of the highest sensitivity at which a camera can capture excellent quality photos.

  Cameras with higher effective ISO will be better choices for indoor photography, night shooting, and indoor sports photography, especially if you intend to make large prints.

  You can learn more at our glossary entry.

  Maximum effective ISO test data courtesy of DxO Mark.

  D3X test data on DxO Mark A77 test data on DxO Mark
  1,992 vs 801 iso
  Take photos in low light with less noise
• Longer stills battery life
  More info

  Longer stills battery life

  Cameras with longer battery life can take more photos before exhausting their batteries.

  Special note: The measurement standard for battery life stipulates that if a camera has an internal flash, it must be used for 50% of photos taken. For this reason, comparisons of one camera with an internal flash to another without will not be comparable

  4400 vs 530 shots
  Capture more photos
• More cross-type AF points
  15 vs 11
  Cross-type AF points improve autofocus performance
• Dual card slots
  Yes vs No
  Gives you more storage flexibility
• More AF points
  51 vs 19
  More AF points improve autofocus
• Bigger JPEG buffer
  31 vs 17 shots
  Take more JPEG shots before waiting (burst mode)