• 4/3 224.9mm2
  • 12.3 megapixels
  •  
  • 1/2.33 inch 28.2mm2
  • 14.1 megapixels
  • 24.00mm - 480.00mm (35mm eq.)

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Differences

Olympus E-PM1 advantages over Panasonic ZS20

  • Larger sensor
    4/3 vs 1/2.33 inch
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 4.29 vs 1.42 microns
    Better low-light and dynamic range (all else equal)
  • RAW file ability
    Yes vs No
    Gives you more flexibility to develop your photos later
  • Fast startup
    ~1.80 vs 2.4 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 330 vs 260 shots
    Capture more photos
  • Manual focus
    Yes vs No
    AF is for the weak. Real photographers focus manually.
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities
  • Bulb shutter
    Bulb vs No bulb
    Hold the shutter open manually for long exposures
  • Faster shutter
    1/4000 vs 1/2000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    12800 vs 6400 ISO
    Higher extended ISO can give more low-light flexibility

Panasonic ZS20 advantages over Olympus E-PM1

  • Less expensive
    $300 vs $500 (MSRP)
    Save money for lenses or accessories
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • Faster JPEG shooting
    10.0 fps vs 5.3 fps
    Faster JPEG shooting (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos

Similarities

Common Strengths

  • Rear display
    Both provide
    Review photos on the back of the camera
  • In-Camera Image Stabilization
    Both provide
    Reduces the effects of camera shake at slower shutter speeds
  • HDMI out
    Both provide
    Use HDMI output to monitor or review video

Common Weaknesses

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • Focus peaking
    Neither provide
    Your camera will highlight what's in focus
  • Eye-level viewfinder
    Neither provide
    You'll be able to frame photos even when the sun is out
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Neither provide
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Neither provide
    Share your photos wirelessly
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • Integrated ND filter
    Neither provide
    Shoot in daylight with a large aperture or slow shutter
  • 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

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Buy the Olympus E-PM1

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Buy the Panasonic ZS20
Panasonic ZS20

Review Excerpt

  • Very long zoom lens; Full HD video; Great grip; Built-in GPS; HDR and Handheld Night Shot modes.

  • Poor image quality due to excessive noise suppression; Flash too close to the grip; No GPS logging; Battery only charges in the camera; Limited touchscreen.

  • Read our Panasonic ZS20 Express Review

The Competition

Compared to Panasonic ZS10

Olympus E-PM1
Panasonic ZS10
  • $500
  • 4/3
  • Larger sensor
  • Bigger pixels
  • $214
  • 1/2.33 inch
  • Less expensive
  • Touchscreen

Compare Olympus E-PM1 vs Panasonic ZS10

Panasonic ZS20
Panasonic ZS10
  • $217
  • 1/2.33 inch
  • Less expensive
  • More telephoto lens reach
  • $214
  • 1/2.33 inch
  • Built-in Wi-Fi
  • Faster shutter

Compare Panasonic ZS20 vs Panasonic ZS10

Compared to Olympus E-PL3

Olympus E-PM1
Olympus E-PL3
  • $500
  • 4/3
  • Less expensive
  • $700
  • 4/3
  • Tiltable Screen

Compare Olympus E-PM1 vs Olympus E-PL3

Panasonic ZS20
Olympus E-PL3
  • $217
  • 1/2.33 inch
  • Less expensive
  • Touchscreen
  • $700
  • 4/3
  • Larger sensor
  • Bigger pixels

Compare Panasonic ZS20 vs Olympus E-PL3

Compared to Panasonic GF3X

Olympus E-PM1
Panasonic GF3X
  • $500
  • 4/3
  • Less expensive
  • In-Camera Image Stabilization
  • $750
  • 4/3
  • Touchscreen
  • Internal flash

Compare Olympus E-PM1 vs Panasonic GF3X

Panasonic ZS20
Panasonic GF3X
  • $217
  • 1/2.33 inch
  • Less expensive
  • In-Camera Image Stabilization
  • $750
  • 4/3
  • Larger sensor
  • Bigger pixels

Compare Panasonic ZS20 vs Panasonic GF3X

Compared to Panasonic GF5

Olympus E-PM1
Panasonic GF5
  • $500
  • 4/3
  • Less expensive
  • In-Camera Image Stabilization
  • $430
  • 4/3
  • Touchscreen
  • Higher effective ISO

Compare Olympus E-PM1 vs Panasonic GF5

Panasonic ZS20
Panasonic GF5
  • $217
  • 1/2.33 inch
  • Less expensive
  • In-Camera Image Stabilization
  • $430
  • 4/3
  • Larger sensor
  • Bigger pixels

Compare Panasonic ZS20 vs Panasonic GF5

Compared to Panasonic ZS19

Olympus E-PM1
Panasonic ZS19
  • $500
  • 4/3
  • Larger sensor
  • Bigger pixels
  • $300
  • 1/2.33 inch
  • Less expensive
  • Touchscreen

Compare Olympus E-PM1 vs Panasonic ZS19

Panasonic ZS20
Panasonic ZS19
  • $217
  • 1/2.33 inch
  • Built-in GPS
  • $300
  • 1/2.33 inch

Compare Panasonic ZS20 vs Panasonic ZS19

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