• APS-C 369.7mm2
  • 16.1 megapixels
  • ISO 100 - 16,000
  • 1 inch 116.2mm2
  • 18.4 megapixels
  • ISO 160 - 12,800

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Differences

Sony A57 advantages over Nikon J4

  • Lens selection
    Good vs Limited
    Better lens selection gives you more options
  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Larger sensor
    APS-C vs 1 inch
    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
    ~ 4.82 vs 2.52 microns
    Better low-light and dynamic range (all else equal)
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Better color depth
    23.4 vs 20.8 bits
    Capture richer, more accurate colors
  • Higher effective ISO
    785 vs 426 iso
    Take photos in low light with less noise
  • More dynamic range
    13.0 vs 10.7 evs
    Retain detail in highlight and shadows
  • Longer stills battery life
    More info 550 vs 300 shots
    Capture more photos
  • Higher max flash sync
    1/160 vs 1/60 sec
    Reduce the effect of ambient light in flash shots
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos
  • Higher extended ISO
    25600 vs 12800 ISO
    Higher extended ISO can give more low-light flexibility

Nikon J4 advantages over Sony A57

  • Less expensive
    $650 vs $800 (MSRP)
    Save money for lenses or accessories
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Thinner
    28 mm vs 80 mm
    Thinner
  • Lighter weight
    317g vs 828g
    Lighter weight
  • Lacks anti-aliasing filter
    No Filter vs Filter
    Enjoy sharper photos
  • Faster JPEG shooting
    60.0 fps vs 10.0 fps
    Faster JPEG shooting (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/16000 vs 1/4000 sec
    Shoot wide open in bright light

Similarities

Common Strengths

  • In-camera panoramas
    Both provide
    Stitches multiple shots into a panoramic photo
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • 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

  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • 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
  • External Mic Jack
    Neither provide
    Improved sound fidelity when shooting video
  • Dual card slots
    Neither provide
    Gives you more storage flexibility
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video

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Review Excerpt

The Competition

Compared to Nikon D5100

Sony A57
Nikon D5100
  • $800
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $650
  • APS-C
  • Lens selection
  • Tilt-swivel screen
Nikon J4
Nikon D5100
  • $350
  • 1 inch
  • Less expensive
  • Touchscreen
  • $650
  • APS-C
  • Lens selection
  • Larger sensor

Compared to Sony A37

Sony A57
Sony A37
  • $800
  • APS-C
  • Longer stills battery life
  • Higher-res screen
  • $600
  • APS-C
  • Less expensive
  • External Mic Jack
Nikon J4
Sony A37
  • $350
  • 1 inch
  • Touchscreen
  • Built-in Wi-Fi
  • $600
  • APS-C
  • Lens selection
  • Focus peaking

Compared to Pentax K-5 IIs

Sony A57
Pentax K-5 IIs
  • $800
  • APS-C
  • Less expensive
  • Focus peaking
  • $497
  • APS-C
  • Lens selection
  • Higher effective ISO
Nikon J4
Pentax K-5 IIs
  • $350
  • 1 inch
  • Less expensive
  • Touchscreen
  • $497
  • APS-C
  • Lens selection
  • Larger sensor

Compared to Samsung NX Mini

Sony A57
Samsung NX Mini
  • $800
  • APS-C
  • Focus peaking
  • Larger sensor
  • $600
  • 1 inch
  • Less expensive
  • Touchscreen
Nikon J4
Samsung NX Mini
  • $350
  • 1 inch
  • On-sensor phase detect
  • Higher-res screen
  • $600
  • 1 inch
  • Less expensive
  • Tiltable Screen

Compared to Nikon J5

Sony A57
Nikon J5
  • $800
  • APS-C
  • Lens selection
  • Focus peaking
  • $497
  • 1 inch
  • Shoot 4K video
  • Touchscreen
Nikon J4
Nikon J5
  • $350
  • 1 inch
  • Longer stills battery life
  • $497
  • 1 inch
  • Shoot 4K video
  • Tiltable Screen
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