• APS-C 355.7mm2
  • 14.2 megapixels
  • ISO 100 - 3200
  • 35mm 861.6mm2
  • 36.4 megapixels
  • ISO 100 - 819,200

Buy From

Differences

Nikon D3100 advantages over Pentax K-1 II

  • Fast startup
    ~0.40 vs 1.4 sec
    Faster startup lets you catch the moment
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash

Pentax K-1 II advantages over Nikon D3100

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Longer stills battery life
    More info 670 vs 550 shots
    Capture more photos
  • More telephoto lens reach
    105 mm vs 83 mm
    Capture objects farther away with the kit lens
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • More cross-type AF points
    25 vs 1
    Cross-type AF points improve autofocus performance
  • Pentaprism viewfinder
    Pentaprism vs Pentamirror
    Much better viewfinder picture fidelity
  • Newer
    18 months vs 9 years old
    Newer cameras often support more advanced features
  • More dots on screen
    1037k vs 230k dots
    Can mean greater resolution or a brighter screen
  • Less shutter lag
    0.10 vs 0.28 sec
    Focus and take a photo quickly (wide angle)
  • More viewfinder magnification
    0.70x vs 0.53x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    36.4 vs 14.2 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • More AF points
    33 vs 11
    More AF points improve autofocus
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré
  • Faster JPEG shooting
    4.5 fps vs 2.9 fps
    Faster JPEG shooting (burst mode)
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    819200 vs 12800 ISO
    Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • HDMI out
    Both provide
    Use HDMI output to monitor or review video
  • Hot shoe
    Both provide
    Off-camera flashes open new possibilities
  • Bulb shutter
    Both provide
    Hold the shutter open manually for long exposures

Common Weaknesses

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

Review Excerpt

  • Excellent build and comfortable handling; Bright, roomy viewfinder and articulated LCD; Great image quality; Good performance for the class; In-camera stabilization, GPS and Wi-Fi; Incredibly feature-rich design.

  • Bulkier than APS-C DSLRs; Top ISOs are for the spec sheet, not the real world; JPEGs are a bit punchy by default; Slow startup; Below-average battery life; Only a relatively modest update to the K-1.

The Competition

Compared to Sony A33

Nikon D3100
Sony A33
  • $700
  • APS-C
  • Lens selection
  • Fast startup
  • $540
  • APS-C
  • In-Camera Image Stabilization
  • In-camera panoramas
Pentax K-1 II
Sony A33
  • $1797
  • 35mm
  • Lens selection
  • Focus peaking
  • $540
  • APS-C
  • In-camera panoramas
  • Fast startup

Compared to Pentax K-r

Nikon D3100
Pentax K-r
  • $700
  • APS-C
  • Less expensive
  • Higher effective ISO
  • $850
  • APS-C
  • In-Camera Image Stabilization
  • Fast startup
Pentax K-1 II
Pentax K-r
  • $1797
  • 35mm
  • Focus peaking
  • Larger sensor
  • $850
  • APS-C
  • Fast startup
  • Internal flash

Compared to Nikon D5100

Nikon D3100
Nikon D5100
  • $700
  • APS-C
  • $499
  • APS-C
  • Tilt-swivel screen
  • Higher effective ISO
Pentax K-1 II
Nikon D5100
  • $1797
  • 35mm
  • Focus peaking
  • Larger sensor
  • $499
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Canon 5D Mark IV

Nikon D3100
Canon 5D Mark IV
  • $700
  • APS-C
  • Internal flash
  • $2499
  • 35mm
  • Larger sensor
  • Shoot 4K video
Pentax K-1 II
Canon 5D Mark IV
  • $1797
  • 35mm
  • Less expensive
  • Focus peaking
  • $2499
  • 35mm
  • Shoot 4K video
  • Touchscreen

Compared to Nikon D850

Nikon D3100
Nikon D850
  • $700
  • APS-C
  • Bigger pixels
  • Internal flash
  • $2797
  • 35mm
  • Focus peaking
  • Larger sensor
Pentax K-1 II
Nikon D850
  • $1797
  • 35mm
  • Less expensive
  • In-Camera Image Stabilization
  • $2797
  • 35mm
  • Shoot 4K video
  • Touchscreen
Compare Other Cameras?