Nikon D3100 vs Olympus E-PM1

Nikon D3100 advantages over Olympus E-PM1

• Larger sensor
  APS-C vs 4/3
  More sensor area. Bigger is (generally) better.
• Eye-level viewfinder
  Eye-level vs Rear display only
  You'll be able to frame photos even when the sun is out
• Bigger pixels
  ~ 5.01 vs 4.29 microns
  Better low-light and dynamic range (all else equal)
• Fast startup
  ~0.40 vs 1.8 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.

  D3100 test data on DxO Mark E-PM1 test data on DxO Mark
  919 vs 499 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

  550 vs 330 shots
  Capture more photos
• Internal flash
  Internal flash vs None
  Useful in a pinch for fill flash
• Shoots 24p video
  Yes vs No
  Gives your movies a big-screen feel
• Shoots 1080p video
  Yes vs No
  You'll want this if you shoot video
• More pixels
  14.2 vs 12.3 megapixels
  Higher resolution photos
• Bigger JPEG buffer
  100 vs 9 shots
  Take more JPEG shots before waiting (burst mode)