• 1/2.3 inch 28.1mm2
  • 16.0 megapixels
  • 25.00mm - 100.00mm (35mm eq.)
  • APS-C 366.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600

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Differences

Pentax WG-3 advantages over Sony A5100

  • Waterproof
    Yes vs No
    Take photos underwater without destroying your camera!
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds

Sony A5100 advantages over Pentax WG-3

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Larger sensor
    APS-C vs 1/2.3 inch
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 3.92 vs 1.34 microns
    Better low-light and dynamic range (all else equal)
  • 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
  • RAW file ability
    Yes vs No
    Gives you more flexibility to develop your photos later
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • 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
  • Longer stills battery life
    More info 400 vs 240 shots
    Capture more photos
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • More dots on screen
    922k vs 460k dots
    Can mean greater resolution or a brighter screen
  • More pixels
    24.3 vs 16.0 megapixels
    Higher resolution photos
  • Longer exposure
    30 vs 4 sec
    Long exposures for night shots
  • Bulb shutter
    Bulb vs No bulb
    Hold the shutter open manually for long exposures
  • Higher extended ISO
    25600 vs 6400 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
  • 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

Common Weaknesses

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • Eye-level viewfinder
    Neither provide
    You'll be able to frame photos even when the sun is out
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Built-in GPS
    Neither provide
    Geotag your photos
  • 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
  • Hot shoe
    Neither provide
    Off-camera flashes open new possibilities
  • 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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Your purchases support this site

Buy the Sony A5100

Review Excerpt

  • Very small and comfortable form factor; Very good image quality for its class; New dual video record function; Quick autofocus and good dynamic range.

  • Lacks an EVF and external mode dial; No hot shoe; JPEG processing at higher ISOs not as good as some competing mid-level models.

The Competition

Compared to Pentax WG-3 GPS

Pentax WG-3
Pentax WG-3 GPS
  • $189
  • 1/2.3 inch
  • Less expensive
  • $229
  • 1/2.3 inch
  • In-camera panoramas
  • Built-in GPS
Sony A5100
Pentax WG-3 GPS
  • $348
  • APS-C
  • Focus peaking
  • Larger sensor
  • $229
  • 1/2.3 inch
  • Waterproof
  • In-Camera Image Stabilization

Compared to Samsung NX1100

Pentax WG-3
Samsung NX1100
  • $189
  • 1/2.3 inch
  • Less expensive
  • Waterproof
  • $450
  • APS-C
  • Larger sensor
  • Bigger pixels
Sony A5100
Samsung NX1100
  • $348
  • APS-C
  • Lens selection
  • Focus peaking
  • $450
  • APS-C
  • Higher-res screen
  • Hot shoe

Compared to Sony A5000

Pentax WG-3
Sony A5000
  • $189
  • 1/2.3 inch
  • Waterproof
  • In-Camera Image Stabilization
  • $298
  • APS-C
  • Focus peaking
  • Larger sensor
Sony A5100
Sony A5000
  • $348
  • APS-C
  • Touchscreen
  • Higher effective ISO
  • $298
  • APS-C
  • Less expensive

Compared to Ricoh WG-4 GPS

Pentax WG-3
Ricoh WG-4 GPS
  • $189
  • 1/2.3 inch
  • Less expensive
  • $380
  • 1/2.3 inch
  • In-camera panoramas
  • Built-in GPS
Sony A5100
Ricoh WG-4 GPS
  • $348
  • APS-C
  • Focus peaking
  • Larger sensor
  • $380
  • 1/2.3 inch
  • Waterproof
  • In-Camera Image Stabilization

Compared to Ricoh WG-4

Pentax WG-3
Ricoh WG-4
  • $189
  • 1/2.3 inch
  • $330
  • 1/2.3 inch
  • In-camera panoramas
  • Slow-motion videos
Sony A5100
Ricoh WG-4
  • $348
  • APS-C
  • Focus peaking
  • Larger sensor
  • $330
  • 1/2.3 inch
  • Waterproof
  • In-Camera Image Stabilization
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