• APS-C 372.9mm2
  • 12.3 megapixels
  • ISO 200 - 3200
  • APS-C 366.6mm2
  • 24.4 megapixels
  • ISO 100 - 51,200

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Differences

Nikon D300 advantages over Pentax K-3

  • Bigger pixels
    ~ 5.50 vs 3.91 microns
    Better low-light and dynamic range (all else equal)
  • Fast startup
    ~0.30 vs 0.9 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 1000 vs 560 shots
    Capture more photos

Pentax K-3 advantages over Nikon D300

  • Less expensive
    $1150 vs $1800 (MSRP)
    Save money for lenses or accessories
  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Higher effective ISO
    1,216 vs 679 iso
    Take photos in low light with less noise
  • More dynamic range
    13.4 vs 12.0 evs
    Retain detail in highlight and shadows
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Newer
    11 years vs 17 years old
    Newer cameras often support more advanced features
  • 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
  • Less shutter lag
    0.14 vs 0.23 sec
    Focus and take a photo quickly (wide angle)
  • More pixels
    24.4 vs 12.3 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
  • 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
    7.1 fps vs 6.1 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    75 vs 37 shots
    Take more JPEG shots before waiting (burst mode)
  • Higher extended ISO
    51200 vs 6400 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
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • Top deck display
    Both provide
    Check settings with a screen on top of the camera
  • Pentaprism viewfinder
    Both provide
    Much better viewfinder picture fidelity
  • 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
  • Tiltable Screen
    Neither provide
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Neither provide
    Share your photos wirelessly
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Built-in GPS
    Neither provide
    Geotag your photos
  • 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

Your purchases support this site

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Buy the Pentax K-3

Review Excerpt

  • Top-notch image quality; Great ergonomics in a compact body; Unique on-demand low-pass filtering; Broad sensitivity range; Large and bright viewfinder for an APS-C camera; Dual card slots; Optional Wi-Fi remote control

  • AE Lock button is poorly located; Below-average battery life for a DSLR; Rather dated-looking menu system; Requires a different battery grip accessory than its predecessors; Less third-party support than some rivals

The Competition

Compared to Nikon D7100

Nikon D300
Nikon D7100
  • $1800
  • APS-C
  • Bigger pixels
  • Has anti-aliasing filter
  • $745
  • APS-C
  • Higher effective ISO
  • More dynamic range
Pentax K-3
Nikon D7100
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $745
  • APS-C
  • Fast startup
  • Longer stills battery life

Compared to Canon 70D

Nikon D300
Canon 70D
  • $1800
  • APS-C
  • Larger sensor
  • Bigger pixels
  • $1149
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
Pentax K-3
Canon 70D
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1149
  • APS-C
  • Tilt-swivel screen
  • Touchscreen

Compared to Nikon D5300

Nikon D300
Nikon D5300
  • $1800
  • APS-C
  • Bigger pixels
  • Fast startup
  • $549
  • APS-C
  • Tilt-swivel screen
  • Built-in Wi-Fi
Pentax K-3
Nikon D5300
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $549
  • APS-C
  • Tilt-swivel screen
  • Fast startup

Compared to Sony A77 II

Nikon D300
Sony A77 II
  • $1800
  • APS-C
  • Lens selection
  • Bigger pixels
  • $1198
  • APS-C
  • Focus peaking
  • Tilt-swivel screen
Pentax K-3
Sony A77 II
  • $699
  • APS-C
  • Lens selection
  • More telephoto lens reach
  • $1198
  • APS-C
  • Tilt-swivel screen
  • In-camera panoramas

Compared to Nikon D7200

Nikon D300
Nikon D7200
  • $1800
  • APS-C
  • Bigger pixels
  • Fast startup
  • $1016
  • APS-C
  • Built-in Wi-Fi
  • Better color depth
Pentax K-3
Nikon D7200
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1016
  • APS-C
  • Fast startup
  • Built-in Wi-Fi
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