Nikon D3X vs Pentax 645D

Nikon D3X advantages over Pentax 645D

• Lens selection
  Excellent vs Limited
  Better lens selection gives you more options
• Less expensive
  $8000 vs $9996 (MSRP)
  Save money for lenses or accessories
• Fast startup
  ~0.30 vs 0.7 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 645D test data on DxO Mark
  1,992 vs 1,262 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 800 shots
  Capture more photos
• Thinner
  87 mm vs 119 mm
  Thinner
• External Mic Jack
  Jack vs No jack
  Improved sound fidelity when shooting video
• More cross-type AF points
  15 vs 11
  Cross-type AF points improve autofocus performance
• Higher max flash sync
  1/250 vs 1/125 sec
  Reduce the effect of ambient light in flash shots
• More AF points
  51 vs 11
  More AF points improve autofocus
• Has anti-aliasing filter
  Filter vs No Filter
  Reduces unsightly moiré in photos
• Faster JPEG shooting
  5.0 fps vs 1.1 fps
  Faster JPEG shooting (burst mode)
• Bigger JPEG buffer
  31 vs 19 shots
  Take more JPEG shots before waiting (burst mode)
• Faster shutter
  1/8000 vs 1/4000 sec
  Shoot wide open in bright light
• Higher extended ISO
  6400 vs 1600 ISO
  Higher extended ISO can give more low-light flexibility