• APS-C 366.6mm2
  • 24.4 megapixels
  • ISO 100 - 51,200
  • APS-C 366.6mm2
  • 24.2 megapixels
  • ISO 100 - 32,000

Buy From

Differences

Pentax K-3 advantages over Sony A6100

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Longer stills battery life
    More info 560 vs 420 shots
    Capture more photos
  • More telephoto lens reach
    203 mm vs 75 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
  • 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 shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light

Sony A6100 advantages over Pentax K-3

  • Shoot 4K video
    4K (UHD) vs 1080p
    Make sure you have a fast computer
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Thinner
    59 mm vs 77 mm
    Thinner
  • Newer
    5 years vs 11 years old
    Newer cameras often support more advanced features
  • Lighter weight
    512g vs 1240g
    Lighter weight
  • More viewfinder magnification
    0.70x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • Wider angle kit lens
    24 mm vs 27 mm
    Capture more of the scene with the included lens
  • Faster JPEG shooting
    11.0 fps vs 7.1 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    11.0 fps vs 7.1 fps
    Faster RAW shooting in burst mode
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos

Similarities

Common Strengths

  • Focus peaking
    Both provide
    Your camera will highlight what's in focus
  • 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
  • External Mic Jack
    Both provide
    Improved sound fidelity when shooting video
  • 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
  • Built-in GPS
    Neither provide
    Geotag your photos

User reviews

Buy From

Your purchases support this site

Buy the Pentax K-3
Body Only
  • Body Only
  • Kit with 18-135mm Lens
All K-3 Deals

Your purchases support this site

Buy the Sony A6100
Body Only
  • Body Only
  • Kit with 16-50mm and 55-210mm Lenses
  • Kit with 16-50mm Lens
All A6100 Deals

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

  • Read our Pentax K-3 Review

The Competition

Compared to Nikon D7100

Pentax K-3
Nikon D7100
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $810
  • APS-C
  • Fast startup
  • Longer stills battery life

Compare Pentax K-3 vs Nikon D7100

Sony A6100
Nikon D7100
  • $648
  • APS-C
  • Less expensive
  • Focus peaking
  • $810
  • APS-C
  • Lens selection
  • Longer stills battery life

Compare Sony A6100 vs Nikon D7100

Compared to Nikon D5300

Pentax K-3
Nikon D5300
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $549
  • APS-C
  • Tilt-swivel screen
  • Fast startup

Compare Pentax K-3 vs Nikon D5300

Sony A6100
Nikon D5300
  • $648
  • APS-C
  • Focus peaking
  • Shoot 4K video
  • $549
  • APS-C
  • Lens selection
  • Tilt-swivel screen

Compare Sony A6100 vs Nikon D5300

Compared to Nikon D7200

Pentax K-3
Nikon D7200
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1016
  • APS-C
  • Fast startup
  • Built-in Wi-Fi

Compare Pentax K-3 vs Nikon D7200

Sony A6100
Nikon D7200
  • $648
  • APS-C
  • Less expensive
  • Focus peaking
  • $1016
  • APS-C
  • Lens selection
  • Longer stills battery life

Compare Sony A6100 vs Nikon D7200

Compared to Fujifilm X-T100

Pentax K-3
Fujifilm X-T100
  • $699
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization
  • $599
  • APS-C
  • Tilt-swivel screen
  • Shoot 4K video

Compare Pentax K-3 vs Fujifilm X-T100

Sony A6100
Fujifilm X-T100
  • $648
  • APS-C
  • Slower slow-motion
  • NFC
  • $599
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compare Sony A6100 vs Fujifilm X-T100

Compared to Sony A6400

Pentax K-3
Sony A6400
  • $699
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization
  • $798
  • APS-C
  • Shoot 4K video
  • Touchscreen

Compare Pentax K-3 vs Sony A6400

Sony A6100
Sony A6400
  • $648
  • APS-C
  • Less expensive
  • $798
  • APS-C
  • Higher extended ISO

Compare Sony A6100 vs Sony A6400

Compare Other Cameras?