Nikon D3S vs Pentax 645D

Nikon D3S advantages over Pentax 645D

• Lens selection
  Excellent vs Limited
  Better lens selection gives you more options
• Less expensive
  $5200 vs $9996 (MSRP)
  Save money for lenses or accessories
• Bigger pixels
  ~ 8.46 vs 6.06 microns
  Better low-light and dynamic range (all else equal)
• 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.

  D3S test data on DxO Mark 645D test data on DxO Mark
  3,253 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

  4200 vs 800 shots
  Capture more photos
• Thinner
  87 mm vs 119 mm
  Thinner
• Higher max flash sync
  1/250 vs 1/125 sec
  Reduce the effect of ambient light in flash shots
• Shoots 24p video
  Yes vs No
  Gives your movies a big-screen feel
• Has anti-aliasing filter
  Filter vs No Filter
  Reduces unsightly moiré in photos
• Faster JPEG shooting
  9.0 fps vs 1.1 fps
  Faster JPEG shooting (burst mode)
• Bigger JPEG buffer
  90 vs 19 shots
  Take more JPEG shots before waiting (burst mode)
• Faster RAW shooting
  9.1 fps vs 1.1 fps
  Faster RAW shooting in burst mode
• Bigger RAW buffer
  41 vs 16 shots
  Larger buffer for RAW shots (burst mode)
• Faster shutter
  1/8000 vs 1/4000 sec
  Shoot wide open in bright light
• Higher extended ISO
  102400 vs 1600 ISO
  Higher extended ISO can give more low-light flexibility