• 35mm 861.6mm2
  • 24.5 megapixels
  • ISO 100 - 1600
  • 2.17 inch 1,452.0mm2
  • 40.0 megapixels
  • ISO 200 - 1000

Buy From

Advantages

Nikon D3X over Pentax 645D

  • Lens selection
    Excellent vs Limited
    Better lens selection gives you more options
  • Fast startup
    0.30 vs 0.70 sec
    Faster startup lets you catch the moment
  • Longer battery life
    4400 vs 800 shots
    Capture more photos
  • External Mic
    Jack vs No jack
    Improved sound fidelity when shooting video
  • More AF points
    51 vs 11
    More AF points improve autofocus
  • Higher max flash sync
    1/250 vs 1/125 sec
    Reduce the effect of ambient light in flash shots
  • Bigger JPEG buffer
    Unlimited vs 21 shots
    Take more JPEG shots before waiting (single-shot mode)
  • Faster RAW shooting
    4.0 fps vs 0.9 fps
    Faster RAW shooting in single-shot mode
  • Bigger RAW buffer
    31 vs 17 shots
    Larger buffer for RAW shots (single-shot mode)
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos and video
  • Faster JPEG shooting
    4.3 fps vs 0.9 fps
    Faster JPEG shooting (single-shot mode)
  • Higher extended ISO
    6400 vs 1600 ISO
    Higher extended ISO can give more low-light flexibility
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light

Pentax 645D over Nikon D3X

  • Larger sensor
    2.17 inch vs 35mm
    More sensor area. Bigger is (generally) better.
  • More pixels
    40.0 vs 24.5 megapixels
    Higher resolution photos
  • Newer
    4 years vs 6 years old
    Newer cameras often support more advanced features
  • Lacks anti-aliasing filter
    No Filter vs Filter
    Enjoy sharper photos

Buy From

Review Excerpt

  • Very high-resolution 40-megapixel sensor; Plentiful controls with great placement; Excellent optical viewfinder; Dual SDHC card slots; Infrared remote sensors front and back.

  • High price tag; Aliasing artifacts; Produces ~70MB RAW files.

The Competition

Compared to Canon 1D X

Nikon D3X
Canon 1D X
  • $7126
  • 35mm
  • Fast startup
  • Longer battery life
  • $6799
  • 35mm
  • Bigger pixels
  • 60p
Pentax 645D
Canon 1D X
  • $4296
  • 2.17 inch
  • Larger sensor
  • More pixels
  • $6799
  • 35mm
  • Lens selection
  • Fast startup

Compared to Nikon D800

Nikon D3X
Nikon D800
  • $7126
  • 35mm
  • Bigger pixels
  • Longer battery life
  • $2407
  • 35mm
  • 60p
  • Headphone jack
Pentax 645D
Nikon D800
  • $4296
  • 2.17 inch
  • Larger sensor
  • Bigger pixels
  • $2407
  • 35mm
  • Lens selection
  • Fast startup

Compared to Canon 5D Mark III

Nikon D3X
Canon 5D Mark III
  • $7126
  • 35mm
  • Fast startup
  • Longer battery life
  • $3099
  • 35mm
  • 60p
  • More cross-type AF points
Pentax 645D
Canon 5D Mark III
  • $4296
  • 2.17 inch
  • Larger sensor
  • More pixels
  • $3099
  • 35mm
  • Lens selection
  • Fast startup

Compared to Nikon D4S

Nikon D3X
Nikon D4S
  • $7126
  • 35mm
  • More pixels
  • $6497
  • 35mm
  • Fast startup
  • Bigger pixels
Pentax 645D
Nikon D4S
  • $4296
  • 2.17 inch
  • Larger sensor
  • More pixels
  • $6497
  • 35mm
  • Lens selection
  • Fast startup

Compared to Pentax 645Z

Nikon D3X
Pentax 645Z
  • $7126
  • 35mm
  • Lens selection
  • Fast startup
  • $8436
  • 2.15 inch
  • Focus peaking
  • Larger sensor
Pentax 645D
Pentax 645Z
  • $4296
  • 2.17 inch
  • Fast startup
  • Bigger RAW buffer
  • $8436
  • 2.15 inch
  • Focus peaking
  • Tiltable Screen
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