• APS-C 332.3mm2
  • 18.0 megapixels
  • ISO 100 - 6400
  • 4/3 224.9mm2
  • 16.1 megapixels
  • ISO 200 - 12,800

Buy From

Differences

Canon T3i advantages over Panasonic GH3

  • Less expensive
    $600 vs $1300 (MSRP)
    Save money for lenses or accessories
  • Larger sensor
    APS-C vs 4/3
    More sensor area. Bigger is (generally) better.
  • Higher-res screen
    346k vs 205k pixels
    More detail on the screen lets you judge focus and composition

Panasonic GH3 advantages over Canon T3i

  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Fast startup
    ~0.80 vs 1.5 sec
    Faster startup lets you catch the moment
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Longer stills battery life
    More info 540 vs 440 shots
    Capture more photos
  • More viewfinder magnification
    0.67x vs 0.53x
    Get a bigger view of the scene through the eye-level viewfinder
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Longer exposure
    60 vs 30 sec
    Long exposures for night shots
  • Faster JPEG shooting
    6.1 fps vs 3.6 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    Unlimited vs 9 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster RAW shooting
    5.1 fps vs 3.6 fps
    Faster RAW shooting in burst mode
  • Bigger RAW buffer
    24 vs 5 shots
    Larger buffer for RAW shots (burst mode)
  • Higher extended ISO
    25600 vs 12800 ISO
    Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

  • Tilt-swivel screen
    Both provide
    Tilt and swivel the screen for maximum shooting flexibility
  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • External Mic Jack
    Both provide
    Improved sound fidelity when shooting video
  • 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

Common Weaknesses

  • Focus peaking
    Neither provide
    Your camera will highlight what's in focus
  • In-Camera Image Stabilization
    Neither provide
    Reduces the effects of camera shake at slower shutter speeds
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • 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
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • 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
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

Review Excerpt

  • Excellent image quality; Good grip; Full HD video recording; Swiveling LCD; Very fast autofocus; HDMI output.

  • Slow frame rate for sports shooting; Tendency to overexpose in bright sunlight; Live View AF is slow; No microfocus adjustment.

  • Professional quality video in a compact body; Still image quality ranks with the best mirrorless models and even some prosumer DSLRs; Fast autofocus; Rugged, weatherized camera build; Reasonably priced for its advanced feature set; Large selection of high quality lenses.

  • Not as compact as most mirrorless cameras; Live View not available during high speed bursts; High ISO image quality and dynamic range not quite as good as top APS-C cameras.

The Competition

Compared to Nikon D7000

Canon T3i
Nikon D7000
  • $549
  • APS-C
  • Less expensive
  • Tilt-swivel screen
  • $699
  • APS-C
  • Larger sensor
  • Fast startup
Panasonic GH3
Nikon D7000
  • $798
  • 4/3
  • Less expensive
  • Tilt-swivel screen
  • $699
  • APS-C
  • Larger sensor
  • Bigger pixels

Compared to Pentax K-5

Canon T3i
Pentax K-5
  • $549
  • APS-C
  • Tilt-swivel screen
  • More telephoto lens reach
  • $800
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization
Panasonic GH3
Pentax K-5
  • $798
  • 4/3
  • Tilt-swivel screen
  • Touchscreen
  • $800
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization

Compared to Canon T4i

Canon T3i
Canon T4i
  • $549
  • APS-C
  • $789
  • APS-C
  • Touchscreen
  • Fast startup
Panasonic GH3
Canon T4i
  • $798
  • 4/3
  • Built-in Wi-Fi
  • Higher effective ISO
  • $789
  • APS-C
  • Larger sensor
  • On-sensor phase detect

Compared to Olympus E-M1

Canon T3i
Olympus E-M1
  • $549
  • APS-C
  • Tilt-swivel screen
  • Larger sensor
  • $1099
  • 4/3
  • Focus peaking
  • In-Camera Image Stabilization
Panasonic GH3
Olympus E-M1
  • $798
  • 4/3
  • Tilt-swivel screen
  • Longer stills battery life
  • $1099
  • 4/3
  • Focus peaking
  • In-Camera Image Stabilization

Compared to Panasonic GH4

Canon T3i
Panasonic GH4
  • $549
  • APS-C
  • Larger sensor
  • $899
  • 4/3
  • Focus peaking
  • Shoot 4K video
Panasonic GH3
Panasonic GH4
  • $798
  • 4/3
  • $899
  • 4/3
  • Focus peaking
  • Shoot 4K video
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