Sigma SD15 vs Sony A57

Sony A57 advantages over Sigma SD15

• Lens selection
  Good vs Limited
  Better lens selection gives you more options
• Focus peaking
  Peaker vs Non-peaker
  Your camera will highlight what's in focus
• Larger sensor
  APS-C vs 0.98 inch
  More sensor area. Bigger is (generally) better.
• In-Camera Image Stabilization
  Yes vs No
  Reduces the effects of camera shake at slower shutter speeds
• In-camera panoramas
  Yes vs No
  Stitches multiple shots into a panoramic photo
• Tiltable Screen
  Tiltable vs Fixed
  Tilt the screen for shooting flexbility
• 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

  550 vs 250 shots
  Capture more photos
• More cross-type AF points
  3 vs 1
  Cross-type AF points improve autofocus performance
• HDMI out
  HDMI out vs None
  Use HDMI output to monitor or review video
• Shoots 24p video
  Yes vs No
  Gives your movies a big-screen feel
• More dots on screen
  922k vs 460k dots
  Can mean greater resolution or a brighter screen
• Shoots 1080p video
  Yes vs No
  You'll want this if you shoot video
• More viewfinder magnification
  0.69x vs 0.53x
  Get a bigger view of the scene through the eye-level viewfinder
• More pixels
  16.1 vs 4.7 megapixels
  Higher resolution photos
• Shoots 60p video
  Yes vs No
  A faster framerate can give you more editing options
• More AF points
  15 vs 5
  More AF points improve autofocus
• Faster JPEG shooting
  10.0 fps vs 3.0 fps
  Faster JPEG shooting (burst mode)
• Higher extended ISO
  25600 vs 3200 ISO
  Higher extended ISO can give more low-light flexibility