• 35mm 847.3mm2
  • 12.2 megapixels
  • ISO 100 - 102,400
  • APS-C 366.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600

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Differences

Sony A7S 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
  • Bigger pixels
    ~ 8.40 vs 3.92 microns
    Better low-light and dynamic range (all else equal)
  • Higher effective ISO
    3,702 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
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Bigger RAW buffer
    39 vs 25 shots
    Larger buffer for RAW shots (burst mode)
  • 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
    409600 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Sony A5100 advantages over Sony A7S

  • Less expensive
    $448 vs $1998*
    Save money for lenses or accessories
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • 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 48 mm
    Thinner
  • More pixels
    24.3 vs 12.2 megapixels
    Higher resolution photos
  • Faster JPEG shooting
    6.0 fps vs 5.0 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    6.0 fps vs 5.0 fps
    Faster RAW shooting in burst mode

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
  • 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
  • In-Camera Image Stabilization
    Neither provide
    Reduces the effects of camera shake at slower shutter speeds
  • 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

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Your purchases support this site

Buy the Sony A5100

Review Excerpt

  • Outstanding high ISO performance; excellent dynamic range; 4K video recording (via uncompressed HDMI); XAVC S option for HD video; Slightly improved battery life over A7/A7R; Built-in Wi-Fi & NFC connectivity.

  • 4K video requires expensive external recorder; Sluggish startup time; Loud shutter; Silent Shooting mode hurts image quality; Lacks a built-in, pop-up flash; Limited selection of native Sony FE lenses.

  • 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 Leica M-E (Typ 220)

Sony A7S
Leica M-E (Typ 220)
  • $1998
  • 35mm
  • Lens selection
  • Less expensive
  • $4409
  • 35mm
  • Thinner
  • More pixels
Sony A5100
Leica M-E (Typ 220)
  • $348
  • APS-C
  • Lens selection
  • Less expensive
  • $4409
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compared to Samsung NX1100

Sony A7S
Samsung NX1100
  • $1998
  • 35mm
  • Lens selection
  • Focus peaking
  • $450
  • APS-C
  • Less expensive
  • More pixels
Sony A5100
Samsung NX1100
  • $348
  • APS-C
  • Lens selection
  • Focus peaking
  • $450
  • APS-C
  • Higher-res screen
  • Hot shoe

Compared to Sony A5000

Sony A7S
Sony A5000
  • $1998
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
  • $448
  • APS-C
  • Less expensive
  • Internal flash
Sony A5100
Sony A5000
  • $348
  • APS-C
  • Touchscreen
  • Higher effective ISO
  • $448
  • APS-C

Compared to Sony A7S II

Sony A7S
Sony A7S II
  • $1998
  • 35mm
  • Fast startup
  • Higher effective ISO
  • $2198
  • 35mm
  • In-Camera Image Stabilization
  • Shoot 4K video
Sony A5100
Sony A7S II
  • $348
  • APS-C
  • Less expensive
  • Touchscreen
  • $2198
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compared to Leica M (Typ 262)

Sony A7S
Leica M (Typ 262)
  • $1998
  • 35mm
  • Lens selection
  • Focus peaking
  • $4462
  • 35mm
  • Newer
  • More pixels
Sony A5100
Leica M (Typ 262)
  • $348
  • APS-C
  • Lens selection
  • Focus peaking
  • $4462
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
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