• APS-C 369.7mm2
  • 16.2 megapixels
  • ISO 100 - 12,800
  • APS-H 476.1mm2
  • 25.6 megapixels
  • ISO 100 - 6400

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Differences

Sony A55 advantages over Sigma sd Quattro H

  • Lens selection
    Good vs Limited
    Better lens selection gives you more options
  • Less expensive
    $850 vs $1200 (MSRP)
    Save money for lenses or accessories
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Higher extended ISO
    25600 vs 6400 ISO
    Higher extended ISO can give more low-light flexibility

Sigma sd Quattro H advantages over Sony A55

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Larger sensor
    APS-H vs APS-C
    More sensor area. Bigger is (generally) better.
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Newer
    8 years vs 14 years old
    Newer cameras often support more advanced features
  • More dots on screen
    1620k vs 922k dots
    Can mean greater resolution or a brighter screen
  • More pixels
    25.6 vs 16.2 megapixels
    Higher resolution photos
  • Doesn't require an AA filter
    Yes vs No
    A unique sensor design provides sharp photos without moiré

Similarities

Common Strengths

  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • 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

  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • Built-in Wi-Fi
    Neither provide
    Share your photos wirelessly
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • 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

User reviews

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Review Excerpt

The Competition

Compared to Canon T2i

Sony A55
Canon T2i
  • $734
  • APS-C
  • Larger sensor
  • In-Camera Image Stabilization
  • $692
  • APS-C
  • Lens selection
  • Fast startup

Compare Sony A55 vs Canon T2i

Sigma sd Quattro H
Canon T2i
  • $1199
  • APS-H
  • Focus peaking
  • Larger sensor
  • $692
  • APS-C
  • Less expensive
  • Lens selection

Compare Sigma sd Quattro H vs Canon T2i

Compared to Sony A33

Sony A55
Sony A33
  • $734
  • APS-C
  • Higher effective ISO
  • Built-in GPS
  • $540
  • APS-C

Compare Sony A55 vs Sony A33

Sigma sd Quattro H
Sony A33
  • $1199
  • APS-H
  • Focus peaking
  • Larger sensor
  • $540
  • APS-C
  • Lens selection
  • Less expensive

Compare Sigma sd Quattro H vs Sony A33

Compared to Sony A35

Sony A55
Sony A35
  • $734
  • APS-C
  • Tiltable Screen
  • Built-in GPS
  • $567
  • APS-C
  • Less expensive
  • Longer stills battery life

Compare Sony A55 vs Sony A35

Sigma sd Quattro H
Sony A35
  • $1199
  • APS-H
  • Focus peaking
  • Larger sensor
  • $567
  • APS-C
  • Lens selection
  • Less expensive

Compare Sigma sd Quattro H vs Sony A35

Compared to Sigma sd Quattro

Sony A55
Sigma sd Quattro
  • $734
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization
  • $699
  • APS-C
  • Focus peaking
  • On-sensor phase detect

Compare Sony A55 vs Sigma sd Quattro

Sigma sd Quattro H
Sigma sd Quattro
  • $1199
  • APS-H
  • Larger sensor
  • More pixels
  • $699
  • APS-C
  • Bigger RAW buffer

Compare Sigma sd Quattro H vs Sigma sd Quattro

Compared to Fujifilm X-H1

Sony A55
Fujifilm X-H1
  • $734
  • APS-C
  • Bigger pixels
  • Built-in GPS
  • $1199
  • APS-C
  • Focus peaking
  • Shoot 4K video

Compare Sony A55 vs Fujifilm X-H1

Sigma sd Quattro H
Fujifilm X-H1
  • $1199
  • APS-H
  • Larger sensor
  • More dots on screen
  • $1199
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization

Compare Sigma sd Quattro H vs Fujifilm X-H1

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