• APS-C 368.2mm2
  • 16.3 megapixels
  • 35.00mm (35mm eq.)
  • APS-C 366.6mm2
  • 24.4 megapixels
  • ISO 100 - 51,200

Buy From

Differences

Fujifilm X100S advantages over Pentax K-3

  • Bigger pixels
    ~ 4.82 vs 3.91 microns
    Better low-light and dynamic range (all else equal)
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Integrated ND filter
    Yes vs No
    Shoot in daylight with a large aperture or slow shutter
  • Thinner
    53 mm vs 77 mm
    Thinner
  • Higher max flash sync
    1/2000 vs 1/180 sec
    Reduce the effect of ambient light in flash shots

Pentax K-3 advantages over Fujifilm X100S

  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Fast startup
    ~0.90 vs 1.9 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 560 vs 330 shots
    Capture more photos
  • 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
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Higher-res screen
    346k vs 153k pixels
    More detail on the screen lets you judge focus and composition
  • Less shutter lag
    0.14 vs 0.32 sec
    Focus and take a photo quickly (wide angle)
  • More viewfinder magnification
    0.63x vs 0.50x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    24.4 vs 16.3 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
  • Faster JPEG shooting
    7.1 fps vs 5.7 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    75 vs 16 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    7.1 fps vs 5.7 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    24 vs 8 shots
    Larger buffer for RAW shots (burst mode)
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    51200 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
  • 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
  • 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
  • Tiltable Screen
    Neither provide
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Neither provide
    Share your photos wirelessly
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Built-in GPS
    Neither provide
    Geotag your photos
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

Your purchases support this site

Buy the Fujifilm X100S
Fujifilm X100S

Your purchases support this site

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

Review Excerpt

  • Attractive, retro rangefinder-style design; Improved (excellent) still image quality that's even better thanks to second generation X-Trans sensor technology; Great, sharp f/2 35mm-equivalent lens; Overall better operation and performance than the X100; Addition of phase-detect pixels makes bright light autofocusing faster.

  • Low-light AF slow and inconsistent; Video quality, even at 60p, compromised by moire and lack of image stabilization; Combined four-way pad/Command dial means AF control points cumbersome to change; Too easy to bump control dials and change settings accidentally (especially the EV dial).

  • Read our Fujifilm X100S Review

  • 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 Fujifilm X100

Fujifilm X100S
Fujifilm X100
  • $1099
  • APS-C
  • Focus peaking
  • In-camera panoramas
  • $1200
  • APS-C
  • Shoots 24p video

Compare Fujifilm X100S vs Fujifilm X100

Pentax K-3
Fujifilm X100
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $1200
  • APS-C
  • Bigger pixels
  • Integrated ND filter

Compare Pentax K-3 vs Fujifilm X100

Compared to Nikon D7100

Fujifilm X100S
Nikon D7100
  • $1099
  • APS-C
  • Focus peaking
  • Bigger pixels
  • $690
  • APS-C
  • Fast startup
  • Longer stills battery life

Compare Fujifilm X100S vs Nikon D7100

Pentax K-3
Nikon D7100
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $690
  • APS-C
  • Fast startup
  • Longer stills battery life

Compare Pentax K-3 vs Nikon D7100

Compared to Nikon D5300

Fujifilm X100S
Nikon D5300
  • $1099
  • APS-C
  • Focus peaking
  • Bigger pixels
  • $549
  • APS-C
  • Tilt-swivel screen
  • Fast startup

Compare Fujifilm X100S vs 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

Compared to Fujifilm X100T

Fujifilm X100S
Fujifilm X100T
  • $1099
  • APS-C
  • $1299
  • APS-C
  • Built-in Wi-Fi
  • External Mic Jack

Compare Fujifilm X100S vs Fujifilm X100T

Pentax K-3
Fujifilm X100T
  • $699
  • APS-C
  • In-Camera Image Stabilization
  • Fast startup
  • $1299
  • APS-C
  • Bigger pixels
  • In-camera panoramas

Compare Pentax K-3 vs Fujifilm X100T

Compared to Fujifilm X100F

Fujifilm X100S
Fujifilm X100F
  • $1099
  • APS-C
  • Bigger pixels
  • $899
  • APS-C
  • Fast startup
  • Built-in Wi-Fi

Compare Fujifilm X100S vs Fujifilm X100F

Pentax K-3
Fujifilm X100F
  • $699
  • APS-C
  • In-Camera Image Stabilization
  • Fast startup
  • $899
  • APS-C
  • In-camera panoramas
  • Built-in Wi-Fi

Compare Pentax K-3 vs Fujifilm X100F

Compare Other Cameras?