• 35mm 855.6mm2
  • 24.3 megapixels
  • ISO 100 - 25600
  • 35mm 847.3mm2
  • 12.2 megapixels
  • ISO 100 - 102400

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Advantages

Sony A7 over Sony A7S

  • On-sensor phase detect
    Yes vs No
    Might improve live view and video AF performance
  • More pixels
    24.3 vs 12.2 megapixels
    Higher resolution photos

Sony A7S over Sony A7

  • Bigger pixels
    ~ 8.40 vs 5.97 microns
    Better low-light and dynamic range (all else equal)
  • Lighter weight
    507g vs 769g
    Lighter weight
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Higher extended ISO
    409600 vs 51200 ISO
    Higher extended ISO can give more low-light flexibility

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Review Excerpt

  • Incredibly small body for a fully-featured, full-frame camera; Very high resolution; Hybrid autofocus is reasonably fast and confident; Significantly better burst-shooting performance than A7R; Excellent image quality even at very high sensitivities; Faster x-sync than A7R; Accepts existing Alpha-mount and E-mount lenses, and can optionally crop to APS-C image circle.

  • Grass-is-greener syndrome when compared to its higher-res sibling; Moderate performance; Loud shutter (but electronic first-curtain helps); Mediocre battery life when using electronic viewfinder; Weak low-light autofocus considering its price; Limited selection of native Sony FE lenses.

  • 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.

The Competition

Compared to Sony A7R

Sony A7
Sony A7R
  • $1298
  • 35mm
  • Bigger pixels
  • On-sensor phase detect
  • $2098
  • 35mm
  • More pixels
  • Lighter weight
Sony A7S
Sony A7R
  • $2498
  • 35mm
  • Bigger pixels
  • Higher max flash sync
  • $2098
  • 35mm
  • More pixels
  • Lacks anti-aliasing filter

Compared to Fujifilm X-E1

Sony A7
Fujifilm X-E1
  • $1298
  • 35mm
  • Larger sensor
  • Tiltable Screen
  • $442
  • APS-C
  • Internal flash
  • Doesn't require an AA filter
Sony A7S
Fujifilm X-E1
  • $2498
  • 35mm
  • Larger sensor
  • Tiltable Screen
  • $442
  • APS-C
  • More pixels
  • Internal flash

Compared to Samsung Galaxy NX

Sony A7
Samsung Galaxy NX
  • $1298
  • 35mm
  • Lens selection
  • Larger sensor
  • $1019
  • APS-C
  • Touchscreen
  • GPS
Sony A7S
Samsung Galaxy NX
  • $2498
  • 35mm
  • Lens selection
  • Larger sensor
  • $1019
  • APS-C
  • Touchscreen
  • GPS

Compared to Sony A3000

Sony A7
Sony A3000
  • $1298
  • 35mm
  • Larger sensor
  • Tiltable Screen
  • $348
  • APS-C
  • Internal flash
  • Kit lens zoom ratio
Sony A7S
Sony A3000
  • $2498
  • 35mm
  • Larger sensor
  • Tiltable Screen
  • $348
  • APS-C
  • More pixels
  • Internal flash

Compared to Fujifilm X-T1

Sony A7
Fujifilm X-T1
  • $1298
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $1199
  • APS-C
  • Fast startup
  • Less shutter lag
Sony A7S
Fujifilm X-T1
  • $2498
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $1199
  • APS-C
  • Fast startup
  • On-sensor phase detect
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