• 35mm 847.3mm2
  • 12.2 megapixels
  • ISO 100 - 102,400
  • 4/3 224.9mm2
  • 20.2 megapixels
  • ISO 100 - 25,600

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Differences

Sony A7S advantages over YI M1

  • Larger sensor
    35mm vs 4/3
    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 3.34 microns
    Better low-light and dynamic range (all else equal)
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Higher max flash sync
    1/250 vs 1/125 sec
    Reduce the effect of ambient light in flash shots
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • 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

YI M1 advantages over Sony A7S

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Slower slow-motion
    240 fps vs 120 fps
    Supports slower slow-mo
  • Shoot 4K video
    4K (UHD) vs 1080p
    Make sure you have a fast computer
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • Thinner
    33 mm vs 48 mm
    Thinner
  • Lighter weight
    280g vs 507g
    Lighter weight
  • More pixels
    20.2 vs 12.2 megapixels
    Higher resolution photos
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots

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
  • Built-in Wi-Fi
    Both provide
    Share your photos wirelessly
  • HDMI out
    Both provide
    Use HDMI output to monitor or review video
  • Hot shoe
    Both provide
    Off-camera flashes open new possibilities
  • Bulb shutter
    Both provide
    Hold the shutter open manually for long exposures
  • Slow-motion videos
    Both provide
    Shoot slow-motion videos

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 GPS
    Neither provide
    Geotag your photos
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • Internal flash
    Neither provide
    Useful in a pinch for fill flash
  • 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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Buy the YI M1
Kit with 12-40mm lens (Black)
  • Kit with 12-40mm lens (Black)
  • Kit with 12-40mm & 42.5mm lenses (Silver)

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.

  • Read our Sony A7S Review

  • Cheap as chips (and with a kit lens!); Quality Sony Exmor Four Thirds sensor; Widely-supported Micro Four Thirds lens mount; Good image quality from raw files; Reasonable burst performance for price; 4K video capture.

  • Poor ergonomics; Controls too easily bumped; Frustrating user interface; Mediocre JPEG image quality; Heavy-handed noise reduction; Unreliable white balance; No raw+JPEG; Buffer is almost nonexistent; Focus confirmation beep happens while still focusing; AF is poor in low light; Laggy user interface in playback; Extreme crop for 4K video; Kit lenses feel cheap; No bundled flash.

  • Read our YI M1 Express Review

The Competition

Compared to Leica M-E (Typ 220)

Sony A7S
Leica M-E (Typ 220)
  • $1998
  • 35mm
  • Lens selection
  • Less expensive
  • $7999
  • 35mm
  • Thinner
  • More pixels

Compare Sony A7S vs Leica M-E (Typ 220)

YI M1
Leica M-E (Typ 220)
  • $199
  • 4/3
  • Lens selection
  • Shoot 4K video
  • $7999
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compare YI M1 vs Leica M-E (Typ 220)

Compared to Olympus E-PL6

Sony A7S
Olympus E-PL6
  • $1998
  • 35mm
  • Focus peaking
  • Larger sensor
  • $299
  • 4/3
  • Lens selection
  • In-Camera Image Stabilization

Compare Sony A7S vs Olympus E-PL6

YI M1
Olympus E-PL6
  • $199
  • 4/3
  • Focus peaking
  • Shoot 4K video
  • $299
  • 4/3
  • Less expensive
  • In-Camera Image Stabilization

Compare YI M1 vs Olympus E-PL6

Compared to Sony A7S II

Sony A7S
Sony A7S II
  • $1998
  • 35mm
  • Less expensive
  • Fast startup
  • $2398
  • 35mm
  • In-Camera Image Stabilization
  • Shoot 4K video

Compare Sony A7S vs Sony A7S II

YI M1
Sony A7S II
  • $199
  • 4/3
  • Lens selection
  • Slower slow-motion
  • $2398
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compare YI M1 vs Sony A7S II

Compared to Leica M (Typ 262)

Sony A7S
Leica M (Typ 262)
  • $1998
  • 35mm
  • Lens selection
  • Focus peaking
  • $4995
  • 35mm
  • More pixels
  • Lacks anti-aliasing filter

Compare Sony A7S vs Leica M (Typ 262)

YI M1
Leica M (Typ 262)
  • $199
  • 4/3
  • Lens selection
  • Focus peaking
  • $4995
  • 35mm
  • Larger sensor
  • Eye-level viewfinder

Compare YI M1 vs Leica M (Typ 262)

Compared to Panasonic GX850

Sony A7S
Panasonic GX850
  • $1998
  • 35mm
  • Larger sensor
  • Eye-level viewfinder
  • $548
  • 4/3
  • Lens selection
  • Shoot 4K video

Compare Sony A7S vs Panasonic GX850

YI M1
Panasonic GX850
  • $199
  • 4/3
  • Less expensive
  • Built-in Bluetooth
  • $548
  • 4/3
  • Tiltable Screen
  • Internal flash

Compare YI M1 vs Panasonic GX850

Compare Other Cameras?