• APS-C 366.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600
  • 4/3 224.9mm2
  • 16.1 megapixels
  • ISO 200 - 25,600

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Differences

Sony A5100 advantages over Olympus E-PL9

  • Larger sensor
    APS-C vs 4/3
    More sensor area. Bigger is (generally) better.
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • More pixels
    24.3 vs 16.1 megapixels
    Higher resolution photos
  • Wider angle kit lens
    24 mm vs 28 mm
    Capture more of the scene with the included lens
  • Bigger RAW buffer
    25 vs 14 shots
    Larger buffer for RAW shots (burst mode)

Olympus E-PL9 advantages over Sony A5100

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Shoot 4K video
    4K (UHD) vs 1080p
    Make sure you have a fast computer
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • Higher max flash sync
    1/250 vs 1/160 sec
    Reduce the effect of ambient light in flash shots
  • Newer
    7 years vs 10 years old
    Newer cameras often support more advanced features
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Faster JPEG shooting
    8.6 fps vs 6.0 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    Unlimited vs 67 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    8.6 fps vs 6.0 fps
    Faster RAW shooting in 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

  • Focus peaking
    Both provide
    Your camera will highlight what's in focus
  • Touchscreen
    Both provide
    Interact with your camera just like your smartphone
  • 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
  • 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

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • Eye-level viewfinder
    Neither provide
    You'll be able to frame photos even when the sun is out
  • 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

User reviews

Buy From

Your purchases support this site

Buy the Sony A5100

Your purchases support this site

Buy the Olympus E-PL9

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.

The Competition

Compared to Samsung NX1000

Sony A5100
Samsung NX1000
  • $348
  • APS-C
  • Lens selection
  • Focus peaking
  • $413
  • APS-C
  • Higher-res screen
  • Hot shoe
Olympus E-PL9
Samsung NX1000
  • $700
  • 4/3
  • Lens selection
  • Focus peaking
  • $413
  • APS-C
  • Larger sensor
  • Bigger pixels

Compared to Samsung NX1100

Sony A5100
Samsung NX1100
  • $348
  • APS-C
  • Lens selection
  • Focus peaking
  • $450
  • APS-C
  • Higher-res screen
  • Hot shoe
Olympus E-PL9
Samsung NX1100
  • $700
  • 4/3
  • Lens selection
  • Focus peaking
  • $450
  • APS-C
  • Less expensive
  • Larger sensor

Compared to Sony A5000

Sony A5100
Sony A5000
  • $348
  • APS-C
  • Touchscreen
  • Higher effective ISO
  • $298
  • APS-C
  • Less expensive
Olympus E-PL9
Sony A5000
  • $700
  • 4/3
  • Lens selection
  • In-Camera Image Stabilization
  • $298
  • APS-C
  • Larger sensor
  • NFC

Compared to Panasonic GX85

Sony A5100
Panasonic GX85
  • $348
  • APS-C
  • Larger sensor
  • Less expensive
  • $598
  • 4/3
  • Lens selection
  • Eye-level viewfinder
Olympus E-PL9
Panasonic GX85
  • $700
  • 4/3
  • Built-in Bluetooth
  • Longer stills battery life
  • $598
  • 4/3
  • Eye-level viewfinder
  • Lacks anti-aliasing filter

Compared to Olympus E-PL8

Sony A5100
Olympus E-PL8
  • $348
  • APS-C
  • Larger sensor
  • In-camera panoramas
  • $599
  • 4/3
  • Lens selection
  • In-Camera Image Stabilization
Olympus E-PL9
Olympus E-PL8
  • $700
  • 4/3
  • Shoot 4K video
  • In-camera panoramas
  • $599
  • 4/3
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