• APS-C 369.7mm2
  • 12.4 megapixels
  • ISO 200 - 6400
  • APS-C 369.0mm2
  • 19.6 megapixels
  • 75.00mm (35mm eq.)

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Differences

Pentax K-x advantages over Sigma dp3 Quattro

  • Less expensive
    $650 vs $999 (MSRP)
    Save money for lenses or accessories
  • Eye-level viewfinder
    Eye-level vs Rear display only
    You'll be able to frame photos even when the sun is out
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Bigger pixels
    ~ 5.53 vs 4.33 microns
    Better low-light and dynamic range (all else equal)
  • Longer stills battery life
    More info 420 vs 200 shots
    Capture more photos
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    69 mm vs 101 mm
    Thinner
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Bulb shutter
    Bulb vs No bulb
    Hold the shutter open manually for long exposures
  • Faster shutter
    1/6000 vs 1/2000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    12800 vs 6400 ISO
    Higher extended ISO can give more low-light flexibility

Sigma dp3 Quattro advantages over Pentax K-x

  • Higher max flash sync
    1/1250 vs 1/180 sec
    Reduce the effect of ambient light in flash shots
  • Newer
    10 years vs 15 years old
    Newer cameras often support more advanced features
  • More dots on screen
    922k vs 230k dots
    Can mean greater resolution or a brighter screen
  • More pixels
    19.6 vs 12.4 megapixels
    Higher resolution photos
  • Doesn't require an AA filter
    Yes vs No
    A unique sensor design provides sharp photos without moiré

Similarities

Common Strengths

  • Rear display
    Both provide
    Review photos on the back of the camera
  • RAW file ability
    Both provide
    Gives you more flexibility to develop your photos later
  • Manual focus
    Both provide
    AF is for the weak. Real photographers focus manually.
  • Hot shoe
    Both provide
    Off-camera flashes open new possibilities

Common Weaknesses

  • Focus peaking
    Neither provide
    Your camera will highlight what's in focus
  • 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
  • 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
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • Top deck display
    Neither provide
    Check settings with a screen on top of the camera
  • Integrated ND filter
    Neither provide
    Shoot in daylight with a large aperture or slow shutter
  • External Mic Jack
    Neither provide
    Improved sound fidelity when shooting video
  • HDMI out
    Neither provide
    Use HDMI output to monitor or review video
  • Dual card slots
    Neither provide
    Gives you more storage flexibility
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

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Review Excerpt

The Competition

Compared to Sony DSLR-A380

Pentax K-x
Sony DSLR-A380
  • $702
  • APS-C
  • Lens selection
  • Less expensive
  • $849
  • APS-C
  • Tiltable Screen
  • HDMI out

Compare Pentax K-x vs Sony DSLR-A380

Sigma dp3 Quattro
Sony DSLR-A380
  • $999
  • APS-C
  • Higher max flash sync
  • Newer
  • $849
  • APS-C
  • Less expensive
  • Eye-level viewfinder

Compare Sigma dp3 Quattro vs Sony DSLR-A380

Compared to Pentax K-7

Pentax K-x
Pentax K-7
  • $702
  • APS-C
  • Less expensive
  • Higher effective ISO
  • $1300
  • APS-C
  • Longer stills battery life
  • Top deck display

Compare Pentax K-x vs Pentax K-7

Sigma dp3 Quattro
Pentax K-7
  • $999
  • APS-C
  • Less expensive
  • Higher max flash sync
  • $1300
  • APS-C
  • Eye-level viewfinder
  • In-Camera Image Stabilization

Compare Sigma dp3 Quattro vs Pentax K-7

Compared to Pentax K-r

Pentax K-x
Pentax K-r
  • $702
  • APS-C
  • Less expensive
  • Shoots 24p video
  • $850
  • APS-C
  • Fast startup
  • External Mic Jack

Compare Pentax K-x vs Pentax K-r

Sigma dp3 Quattro
Pentax K-r
  • $999
  • APS-C
  • Higher max flash sync
  • Newer
  • $850
  • APS-C
  • Less expensive
  • Eye-level viewfinder

Compare Sigma dp3 Quattro vs Pentax K-r

Compared to Sigma dp2 Quattro

Pentax K-x
Sigma dp2 Quattro
  • $702
  • APS-C
  • Eye-level viewfinder
  • In-Camera Image Stabilization
  • $899
  • APS-C
  • Higher max flash sync
  • Newer

Compare Pentax K-x vs Sigma dp2 Quattro

Sigma dp3 Quattro
Sigma dp2 Quattro
  • $999
  • APS-C
  • More telephoto lens reach
  • $899
  • APS-C
  • Wider angle lens

Compare Sigma dp3 Quattro vs Sigma dp2 Quattro

Compared to Sigma dp1 Quattro

Pentax K-x
Sigma dp1 Quattro
  • $702
  • APS-C
  • Less expensive
  • Eye-level viewfinder
  • $999
  • APS-C
  • Higher max flash sync
  • Newer

Compare Pentax K-x vs Sigma dp1 Quattro

Sigma dp3 Quattro
Sigma dp1 Quattro
  • $999
  • APS-C
  • More telephoto lens reach
  • $999
  • APS-C
  • Wider angle lens

Compare Sigma dp3 Quattro vs Sigma dp1 Quattro

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