Nikon P100 vs Sony A55

Sony A55 advantages over Nikon P100

• Larger sensor
  APS-C vs 1/2.3 inch
  More sensor area. Bigger is (generally) better.
• Bigger pixels
  ~ 4.82 vs 1.69 microns
  Better low-light and dynamic range (all else equal)
• In-camera panoramas
  Yes vs No
  Stitches multiple shots into a panoramic photo
• RAW file ability
  Yes vs No
  Gives you more flexibility to develop your photos later
• Fast startup
  ~0.90 vs 2.3 sec
  Faster startup lets you catch the moment
• Built-in GPS
  GPS vs None
  Geotag your photos
• 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

  330 vs 250 shots
  Capture more photos
• External Mic Jack
  Jack vs No jack
  Improved sound fidelity when shooting video
• More dots on screen
  922k vs 460k dots
  Can mean greater resolution or a brighter screen
• Hot shoe
  Hot shoe vs None
  Off-camera flashes open new possibilities
• More pixels
  16.2 vs 10.3 megapixels
  Higher resolution photos
• Longer exposure
  30 vs 8 sec
  Long exposures for night shots
• Bulb shutter
  Bulb vs No bulb
  Hold the shutter open manually for long exposures
• Bigger JPEG buffer
  32 vs 6 shots
  Take more JPEG shots before waiting (burst mode)
• Higher extended ISO
  25600 vs 6400 ISO
  Higher extended ISO can give more low-light flexibility