Sigma SD15 vs Sony DSLR-A550

Sony DSLR-A550 advantages over Sigma SD15

• Lens selection
  Good vs Limited
  Better lens selection gives you more options
• 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
• 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

  950 vs 250 shots
  Capture more photos
• HDMI out
  HDMI out vs None
  Use HDMI output to monitor or review video
• More dots on screen
  922k vs 460k dots
  Can mean greater resolution or a brighter screen
• More pixels
  14.2 vs 4.7 megapixels
  Higher resolution photos
• More AF points
  9 vs 5
  More AF points improve autofocus
• Faster JPEG shooting
  6.7 fps vs 3.0 fps
  Faster JPEG shooting (burst mode)
• Higher extended ISO
  12800 vs 3200 ISO
  Higher extended ISO can give more low-light flexibility