• 1 inch 116.2mm2
  • 20.1 megapixels
  • 24.00mm - 600.00mm (35mm eq.)
  • APS-C 361.2mm2
  • 25.7 megapixels
  • ISO 100 - 1,600,000

Buy From

Differences

Sony RX10 IV advantages over Pentax K-3 III

  • Less expensive
    $1698* vs $2344
    Save money for lenses or accessories
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Faster JPEG shooting
    23.8 fps vs 12.0 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    217 vs 30 shots
    Take more JPEG shots before waiting (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/32000 vs 1/8000 sec
    Shoot wide open in bright light

Pentax K-3 III advantages over Sony RX10 IV

  • Larger sensor
    APS-C vs 1 inch
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 3.76 vs 2.41 microns
    Better low-light and dynamic range (all else equal)
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Longer stills battery life
    More info 800 vs 400 shots
    Capture more photos
  • Thinner
    73 mm vs 127 mm
    Thinner
  • Newer
    3 years vs 7 years old
    Newer cameras often support more advanced features
  • Lighter weight
    820g vs 1095g
    Lighter weight
  • More viewfinder magnification
    1.05x vs 0.70x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    25.7 vs 20.1 megapixels
    Higher resolution photos
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré
  • Higher extended ISO
    1600000 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

  • Rear display
    Both provide
    Review photos on the back of the camera
  • 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
  • In-Camera Image Stabilization
    Both provide
    Reduces the effects of camera shake at slower shutter speeds
  • Shoot 4K video
    Both provide
    Make sure you have a fast computer
  • Touchscreen
    Both provide
    Interact with your camera just like your smartphone
  • RAW file ability
    Both provide
    Gives you more flexibility to develop your photos later
  • Built-in Wi-Fi
    Both provide
    Share your photos wirelessly
  • Built-in Bluetooth
    Both provide
    Always-on wireless connectivity
  • Manual focus
    Both provide
    AF is for the weak. Real photographers focus manually.
  • Top deck display
    Both provide
    Check settings with a screen on top of the camera
  • 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
  • Headphone jack
    Both provide
    Monitor audio recording while you shoot video
  • 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
  • Integrated ND filter
    Neither provide
    Shoot in daylight with a large aperture or slow shutter

User reviews

Buy From

Your purchases support this site

Buy the Sony RX10 IV
Sony RX10 IV
All RX10 IV Deals

Your purchases support this site

Buy the Pentax K-3 III
Body Only
  • Body Only
  • Kit with 20-40mm F2.8-4 Lens
  • Kit with 55-300mm f/4.5-6.3 Lens
All K-3 III Deals

Review Excerpt

The Competition

Compared to Sony RX10 III

Sony RX10 IV
Sony RX10 III
  • $1698
  • 1 inch
  • Touchscreen
  • Built-in Bluetooth
  • $1398
  • 1 inch
  • Less expensive

Compare Sony RX10 IV vs Sony RX10 III

Pentax K-3 III
Sony RX10 III
  • $1847
  • APS-C
  • Larger sensor
  • Bigger pixels
  • $1398
  • 1 inch
  • Less expensive
  • In-camera panoramas

Compare Pentax K-3 III vs Sony RX10 III

Compared to Panasonic FZ2500

Sony RX10 IV
Panasonic FZ2500
  • $1698
  • 1 inch
  • Slower slow-motion
  • Larger lens aperture
  • $931
  • 1 inch
  • Less expensive
  • Tilt-swivel screen

Compare Sony RX10 IV vs Panasonic FZ2500

Pentax K-3 III
Panasonic FZ2500
  • $1847
  • APS-C
  • Larger sensor
  • Bigger pixels
  • $931
  • 1 inch
  • Less expensive
  • Tilt-swivel screen

Compare Pentax K-3 III vs Panasonic FZ2500

Compared to Pentax KP

Sony RX10 IV
Pentax KP
  • $1698
  • 1 inch
  • Shoot 4K video
  • Touchscreen
  • $999
  • APS-C
  • Less expensive
  • Larger sensor

Compare Sony RX10 IV vs Pentax KP

Pentax K-3 III
Pentax KP
  • $1847
  • APS-C
  • Shoot 4K video
  • Touchscreen
  • $999
  • APS-C
  • Less expensive
  • Tiltable Screen

Compare Pentax K-3 III vs Pentax KP

Compared to Panasonic FZ1000 II

Sony RX10 IV
Panasonic FZ1000 II
  • $1698
  • 1 inch
  • Slower slow-motion
  • Larger lens aperture
  • $865
  • 1 inch
  • Less expensive
  • Tilt-swivel screen

Compare Sony RX10 IV vs Panasonic FZ1000 II

Pentax K-3 III
Panasonic FZ1000 II
  • $1847
  • APS-C
  • Larger sensor
  • Bigger pixels
  • $865
  • 1 inch
  • Less expensive
  • Tilt-swivel screen

Compare Pentax K-3 III vs Panasonic FZ1000 II

Compared to Canon 90D

Sony RX10 IV
Canon 90D
  • $1698
  • 1 inch
  • Focus peaking
  • Slower slow-motion
  • $1199
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compare Sony RX10 IV vs Canon 90D

Pentax K-3 III
Canon 90D
  • $1847
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1199
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compare Pentax K-3 III vs Canon 90D

Compare Other Cameras?