• APS-C 372.9mm2
  • 12.3 megapixels
  • ISO 200 - 3200
  • APS-H 476.1mm2
  • 25.6 megapixels
  • ISO 100 - 6400

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Differences

Nikon D90 advantages over Sigma sd Quattro H

  • Lens selection
    Excellent vs Limited
    Better lens selection gives you more options
  • Bigger pixels
    ~ 5.50 vs 4.30 microns
    Better low-light and dynamic range (all else equal)
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel

Sigma sd Quattro H advantages over Nikon D90

  • 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
    2 years vs 10 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 viewfinder magnification
    0.84x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    25.6 vs 12.3 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

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • In-Camera Image Stabilization
    Neither provide
    Reduces the effects of camera shake at slower shutter speeds
  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • 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
  • 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
  • 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
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

Review Excerpt

The Competition

Compared to Nikon D300S

Nikon D90
Nikon D300S
  • $1300
  • APS-C
  • Higher effective ISO
  • Bigger JPEG buffer
  • $1477
  • APS-C
  • External Mic Jack
  • More cross-type AF points
Sigma sd Quattro H
Nikon D300S
  • $1099
  • APS-H
  • Less expensive
  • Focus peaking
  • $1477
  • APS-C
  • Lens selection
  • Bigger pixels

Compared to Sony DSLR-A550

Nikon D90
Sony DSLR-A550
  • $1300
  • APS-C
  • Lens selection
  • Fast startup
  • $859
  • APS-C
  • Less expensive
  • In-Camera Image Stabilization
Sigma sd Quattro H
Sony DSLR-A550
  • $1099
  • APS-H
  • Focus peaking
  • Larger sensor
  • $859
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization

Compared to Sony DSLR-A500

Nikon D90
Sony DSLR-A500
  • $1300
  • APS-C
  • Lens selection
  • Fast startup
  • $850
  • APS-C
  • Less expensive
  • In-Camera Image Stabilization
Sigma sd Quattro H
Sony DSLR-A500
  • $1099
  • APS-H
  • Focus peaking
  • Larger sensor
  • $850
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization

Compared to Sigma sd Quattro

Nikon D90
Sigma sd Quattro
  • $1300
  • APS-C
  • Lens selection
  • Bigger pixels
  • $699
  • APS-C
  • Focus peaking
  • On-sensor phase detect
Sigma sd Quattro H
Sigma sd Quattro
  • $1099
  • APS-H
  • Larger sensor
  • More viewfinder magnification
  • $699
  • APS-C
  • Less expensive
  • Bigger RAW buffer

Compared to Fujifilm X-H1

Nikon D90
Fujifilm X-H1
  • $1300
  • APS-C
  • Lens selection
  • Bigger pixels
  • $1649
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
Sigma sd Quattro H
Fujifilm X-H1
  • $1099
  • APS-H
  • Less expensive
  • Larger sensor
  • $1649
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization
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