• APS-C 366.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600
  • APS-C 366.6mm2
  • 24.4 megapixels
  • ISO 100 - 51,200

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Differences

Sony A5100 advantages over Pentax K-3 II

  • 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
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Higher effective ISO
    1,347 vs 1,106 iso
    Take photos in low light with less noise
  • 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
  • Thinner
    35 mm vs 77 mm
    Thinner

Pentax K-3 II advantages over Sony A5100

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • 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
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Fast startup
    ~1.20 vs 2.0 sec
    Faster startup lets you catch the moment
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Longer stills battery life
    More info 720 vs 400 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
  • Higher-res screen
    346k vs 230k pixels
    More detail on the screen lets you judge focus and composition
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities
  • Less shutter lag
    0.14 vs 0.23 sec
    Focus and take a photo quickly (wide angle)
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré
  • Faster JPEG shooting
    8.1 fps vs 6.0 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    8.2 fps vs 6.0 fps
    Faster RAW shooting in 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

  • Focus peaking
    Both provide
    Your camera will highlight what's in focus
  • HDMI out
    Both provide
    Use HDMI output to monitor or review 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 Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

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.

  • Top-notch image quality; Spectacular detail from Pixel Shift Resolution; Better performance than K-3; Geotag images with no accessories; Great ergonomics in a compact body; Clever on-demand low-pass filtering; Broad sensitivity range; Large and bright viewfinder for an APS-C camera; Dual card slots

  • No built-in flash strobe; No wireless flash support out of the box; AstroTracer function can be finicky; AE Lock button is poorly located; Below-average battery life for a prosumer DSLR; Requires a different battery grip accessory than its predecessors

The Competition

Compared to Samsung NX1100

Sony A5100
Samsung NX1100
  • $348
  • APS-C
  • Lens selection
  • Focus peaking
  • $450
  • APS-C
  • Higher-res screen
  • Hot shoe
Pentax K-3 II
Samsung NX1100
  • $830
  • APS-C
  • Lens selection
  • Focus peaking
  • $450
  • APS-C
  • Built-in Wi-Fi
  • Thinner

Compared to Sony A5000

Sony A5100
Sony A5000
  • $348
  • APS-C
  • Touchscreen
  • Higher effective ISO
  • $479
  • APS-C
Pentax K-3 II
Sony A5000
  • $830
  • APS-C
  • Lens selection
  • Eye-level viewfinder
  • $479
  • APS-C
  • In-camera panoramas
  • Tiltable Screen

Compared to Sony A6000

Sony A5100
Sony A6000
  • $348
  • APS-C
  • Touchscreen
  • $448
  • APS-C
  • Eye-level viewfinder
  • Higher-res screen
Pentax K-3 II
Sony A6000
  • $830
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization
  • $448
  • APS-C
  • In-camera panoramas
  • Tiltable Screen

Compared to Canon T6i

Sony A5100
Canon T6i
  • $348
  • APS-C
  • Less expensive
  • Focus peaking
  • $549
  • APS-C
  • Lens selection
  • Tilt-swivel screen
Pentax K-3 II
Canon T6i
  • $830
  • APS-C
  • Focus peaking
  • Larger sensor
  • $549
  • APS-C
  • Tilt-swivel screen
  • Touchscreen

Compared to Sony A68

Sony A5100
Sony A68
  • $348
  • APS-C
  • Less expensive
  • Touchscreen
  • $598
  • APS-C
  • Eye-level viewfinder
  • In-Camera Image Stabilization
Pentax K-3 II
Sony A68
  • $830
  • APS-C
  • Lens selection
  • High resolution composite
  • $598
  • APS-C
  • In-camera panoramas
  • Tiltable Screen
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