• APS-C 366.6mm2
  • 24.4 megapixels
  • ISO 100 - 51,200
  • 1/2.3 inch 28.1mm2
  • 16.0 megapixels
  • 24.00mm - 1200.00mm (35mm eq.)

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Differences

Pentax K-3 advantages over Fujifilm S1

  • Larger sensor
    APS-C vs 1/2.3 inch
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 3.91 vs 1.34 microns
    Better low-light and dynamic range (all else equal)
  • Longer stills battery life
    More info 560 vs 350 shots
    Capture more photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • Thinner
    77 mm vs 110 mm
    Thinner
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • More pixels
    24.4 vs 16.0 megapixels
    Higher resolution photos
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Bulb shutter
    Bulb vs No bulb
    Hold the shutter open manually for long exposures
  • Bigger JPEG buffer
    75 vs 9 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster shutter
    1/8000 vs 1/2000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    51200 vs 12800 ISO
    Higher extended ISO can give more low-light flexibility

Fujifilm S1 advantages over Pentax K-3

  • Less expensive
    $349* vs $999
    Save money for lenses or accessories
  • Tilt-swivel screen
    Tilt-swivel vs none
    Tilt and swivel the screen for maximum shooting flexibility
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Faster JPEG shooting
    9.6 fps vs 7.1 fps
    Faster JPEG shooting (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos

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
  • RAW file ability
    Both provide
    Gives you more flexibility to develop your photos later
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • Manual focus
    Both provide
    AF is for the weak. Real photographers focus manually.
  • HDMI out
    Both provide
    Use HDMI output to monitor or review video
  • Hot shoe
    Both provide
    Off-camera flashes open new possibilities

Common Weaknesses

  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • 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
  • Integrated ND filter
    Neither provide
    Shoot in daylight with a large aperture or slow shutter

User reviews

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Your purchases support this site

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

Pentax K-3
Nikon D7100
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $829
  • APS-C
  • Fast startup
  • Longer stills battery life
Fujifilm S1
Nikon D7100
  • $349
  • 1/2.3 inch
  • Focus peaking
  • Less expensive
  • $829
  • APS-C
  • Larger sensor
  • Bigger pixels

Compared to Canon 70D

Pentax K-3
Canon 70D
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $902
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
Fujifilm S1
Canon 70D
  • $349
  • 1/2.3 inch
  • Less expensive
  • Focus peaking
  • $902
  • APS-C
  • Larger sensor
  • Bigger pixels

Compared to Panasonic FZ70

Pentax K-3
Panasonic FZ70
  • $699
  • APS-C
  • Focus peaking
  • Larger sensor
  • $298
  • 1/2.3 inch
  • Less expensive
  • In-camera panoramas
Fujifilm S1
Panasonic FZ70
  • $349
  • 1/2.3 inch
  • Focus peaking
  • Tilt-swivel screen
  • $298
  • 1/2.3 inch
  • Less expensive
  • Wider angle lens

Compared to Nikon D5300

Pentax K-3
Nikon D5300
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $585
  • APS-C
  • Less expensive
  • Tilt-swivel screen
Fujifilm S1
Nikon D5300
  • $349
  • 1/2.3 inch
  • Less expensive
  • Focus peaking
  • $585
  • APS-C
  • Larger sensor
  • Bigger pixels

Compared to Fujifilm S9400W

Pentax K-3
Fujifilm S9400W
  • $699
  • APS-C
  • Focus peaking
  • Larger sensor
  • $330
  • 1/2.3 inch
  • In-camera panoramas
  • Built-in Wi-Fi
Fujifilm S1
Fujifilm S9400W
  • $349
  • 1/2.3 inch
  • Focus peaking
  • Tilt-swivel screen
  • $330
  • 1/2.3 inch
  • Longer stills battery life
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