• APS-C 369.7mm2
  • 14.2 megapixels
  • ISO 100 - 12,800
  • APS-C 332.3mm2
  • 18.0 megapixels
  • ISO 100 - 6400

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Differences

Sony A33 advantages over Canon T3i

  • Larger sensor
    APS-C vs APS-C
    More sensor area. Bigger is (generally) better.
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Bigger pixels
    ~ 5.16 vs 4.30 microns
    Better low-light and dynamic range (all else equal)
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Fast startup
    ~0.80 vs 1.5 sec
    Faster startup lets you catch the moment
  • More cross-type AF points
    3 vs 1
    Cross-type AF points improve autofocus performance
  • Lighter weight
    725g vs 1031g
    Lighter weight
  • More viewfinder magnification
    0.73x vs 0.53x
    Get a bigger view of the scene through the eye-level viewfinder
  • More AF points
    15 vs 9
    More AF points improve autofocus
  • Faster JPEG shooting
    7.1 fps vs 3.6 fps
    Faster JPEG shooting (burst mode)
  • Higher extended ISO
    25600 vs 12800 ISO
    Higher extended ISO can give more low-light flexibility

Canon T3i advantages over Sony A33

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Less expensive
    $600 vs $750 (MSRP)
    Save money for lenses or accessories
  • Tilt-swivel screen
    Tilt-swivel vs tilt-only
    Tilt and swivel the screen for maximum shooting flexibility
  • Higher effective ISO
    793 vs 591 iso
    Take photos in low light with less noise
  • Longer stills battery life
    More info 440 vs 270 shots
    Capture more photos
  • More telephoto lens reach
    216 mm vs 83 mm
    Capture objects farther away with the kit lens
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • More pixels
    18.0 vs 14.2 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options

Similarities

Common Strengths

  • 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
  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • Built-in Wi-Fi
    Neither provide
    Share your photos wirelessly
  • 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
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

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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.

The Competition

Compared to Nikon D3100

Sony A33
Nikon D3100
  • $540
  • APS-C
  • In-Camera Image Stabilization
  • In-camera panoramas
  • $700
  • APS-C
  • Lens selection
  • Fast startup
Canon T3i
Nikon D3100
  • $549
  • APS-C
  • Less expensive
  • Tilt-swivel screen
  • $700
  • APS-C
  • Bigger pixels
  • Fast startup

Compared to Sony A55

Sony A33
Sony A55
  • $540
  • APS-C
  • $734
  • APS-C
  • Higher effective ISO
  • Built-in GPS
Canon T3i
Sony A55
  • $549
  • APS-C
  • Lens selection
  • Less expensive
  • $734
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization

Compared to Pentax K-5

Sony A33
Pentax K-5
  • $540
  • APS-C
  • In-camera panoramas
  • Tiltable Screen
  • $800
  • APS-C
  • Lens selection
  • Fast startup
Canon T3i
Pentax K-5
  • $549
  • APS-C
  • Tilt-swivel screen
  • More telephoto lens reach
  • $800
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization

Compared to Sony A35

Sony A33
Sony A35
  • $540
  • APS-C
  • Tiltable Screen
  • Faster JPEG shooting
  • $567
  • APS-C
  • Higher effective ISO
  • Longer stills battery life
Canon T3i
Sony A35
  • $549
  • APS-C
  • Lens selection
  • Less expensive
  • $567
  • APS-C
  • In-Camera Image Stabilization
  • In-camera panoramas

Compared to Canon T4i

Sony A33
Canon T4i
  • $540
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization
  • $579
  • APS-C
  • Tilt-swivel screen
  • Lens selection
Canon T3i
Canon T4i
  • $549
  • APS-C
  • $579
  • APS-C
  • Touchscreen
  • Fast startup
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