• APS-C 366.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600
  • 35mm 861.6mm2
  • 42.4 megapixels
  • ISO 100 - 25,600

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Differences

Sony A5100 advantages over Sony A7R II

  • Less expensive
    $448 vs $1598*
    Save money for lenses or accessories
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Thinner
    35 mm vs 60 mm
    Thinner
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos
  • Faster JPEG shooting
    6.0 fps vs 5.0 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    67 vs 23 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    6.0 fps vs 5.0 fps
    Faster RAW shooting in burst mode

Sony A7R II advantages over Sony A5100

  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • 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
    ~ 4.51 vs 3.92 microns
    Better low-light and dynamic range (all else equal)
  • Shoot 4K video
    4K (UHD) vs 1080p
    Make sure you have a fast computer
  • Fast startup
    ~1.50 vs 2.0 sec
    Faster startup lets you catch the moment
  • Higher effective ISO
    3,434 vs 1,347 iso
    Take photos in low light with less noise
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Higher max flash sync
    1/250 vs 1/160 sec
    Reduce the effect of ambient light in flash shots
  • Higher-res screen
    307k 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
  • More pixels
    42.4 vs 24.3 megapixels
    Higher resolution photos
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Lacks anti-aliasing filter
    No Filter vs Filter
    Enjoy sharper photos
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    102400 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
  • In-camera panoramas
    Both provide
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Both provide
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Both provide
    Share your photos wirelessly
  • NFC
    Both provide
    Simplifies pairing your camera with supported phones
  • On-sensor phase detect
    Both provide
    Usually improves live view and video AF performance
  • 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
  • Built-in GPS
    Neither provide
    Geotag your photos
  • Top deck display
    Neither provide
    Check settings with a screen on top of the camera
  • Dual card slots
    Neither provide
    Gives you more storage flexibility

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.

  • Superb image quality; Very high resolution; Surprisingly good high ISO performance; Fast autofocus; Compact, comfortable body with lots of customization potential; Bright, roomy and clear viewfinder; Tilting LCD display; Five-axis stabilization; Intuitive Wi-Fi / NFC connectivity

  • Movie button is poorly located; No touch screen; Not as fast to start up or shoot photos as a similarly-priced SLR; Rather slow buffer clearing; No built-in flash; Single card slot; Not weather-sealed to the same degree as some rivals

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
Sony A7R II
Samsung NX1100
  • $1598
  • 35mm
  • Lens selection
  • Focus peaking
  • $450
  • APS-C
  • Less expensive
  • Thinner

Compared to Sony A7R

Sony A5100
Sony A7R
  • $348
  • APS-C
  • Less expensive
  • Touchscreen
  • $1898
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
Sony A7R II
Sony A7R
  • $1598
  • 35mm
  • Less expensive
  • In-Camera Image Stabilization
  • $1898
  • 35mm
  • Lighter weight

Compared to Sony A5000

Sony A5100
Sony A5000
  • $348
  • APS-C
  • Touchscreen
  • Higher effective ISO
  • $479
  • APS-C
Sony A7R II
Sony A5000
  • $1598
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
  • $479
  • APS-C
  • Less expensive
  • Longer stills battery life

Compared to Sony A6000

Sony A5100
Sony A6000
  • $348
  • APS-C
  • Touchscreen
  • $448
  • APS-C
  • Eye-level viewfinder
  • Higher-res screen
Sony A7R II
Sony A6000
  • $1598
  • 35mm
  • Larger sensor
  • In-Camera Image Stabilization
  • $448
  • APS-C
  • Less expensive
  • Internal flash

Compared to Sony A7R III

Sony A5100
Sony A7R III
  • $348
  • APS-C
  • Less expensive
  • In-camera panoramas
  • $2798
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
Sony A7R II
Sony A7R III
  • $1598
  • 35mm
  • Less expensive
  • In-camera panoramas
  • $2798
  • 35mm
  • Touchscreen
  • High resolution composite
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