• APS-C 369.0mm2
  • 14.8 megapixels
  • ISO 100 - 6400
  • APS-C 366.6mm2
  • 24.2 megapixels
  • ISO 100 - 25,600

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Differences

Sigma SD1 Merrill advantages over Nikon D5500

  • Bigger pixels
    ~ 5.00 vs 3.92 microns
    Better low-light and dynamic range (all else equal)
  • Pentaprism viewfinder
    Pentaprism vs Pentamirror
    Much better viewfinder picture fidelity
  • More viewfinder magnification
    0.63x vs 0.55x
    Get a bigger view of the scene through the eye-level viewfinder
  • Doesn't require an AA filter
    Yes vs No
    A unique sensor design provides sharp photos without moiré
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light

Nikon D5500 advantages over Sigma SD1 Merrill

  • Tilt-swivel screen
    Tilt-swivel vs none
    Tilt and swivel the screen for maximum shooting flexibility
  • Lens selection
    Excellent vs Limited
    Better lens selection gives you more options
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Fast startup
    ~0.40 vs 4.5 sec
    Faster startup lets you catch the moment
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • More cross-type AF points
    9 vs 1
    Cross-type AF points improve autofocus performance
  • HDMI out
    HDMI out vs None
    Use HDMI output to monitor or review video
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • More dots on screen
    1037k vs 460k dots
    Can mean greater resolution or a brighter screen
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • Less shutter lag
    0.20 vs 0.38 sec
    Focus and take a photo quickly (wide angle)
  • More pixels
    24.2 vs 14.8 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • More AF points
    39 vs 11
    More AF points improve autofocus
  • Faster JPEG shooting
    4.9 fps vs 4.1 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    100 vs 7 shots
    Take more JPEG shots before waiting (burst mode)
  • Higher extended ISO
    25600 vs 6400 ISO
    Higher extended ISO can give more low-light flexibility

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
  • 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
  • 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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Buy the Sigma SD1 Merrill
Kit with 18-200mm lens
  • Kit with 18-200mm lens
  • Body Only
  • Kit with 17-50mm lens
All SD1 Merrill Deals

Your purchases support this site

Buy the Nikon D5500
Body Only (Black)
  • Body Only (Black)
  • Body Only (Red)
  • Kit with 18-140mm lens (Black)
  • Kit with 18-140mm lens (Red)
  • Kit with 18-55mm lens (Black)
  • Kit with 18-55mm lens (Red)
All D5500 Deals

Review Excerpt

  • Amazingly small for a DSLR; Great image quality for its class, including superb low light and high ISO performance; Generous JPEG buffer depth; High resolution.

  • Buffer depths are shallow when shooting RAW; Lacks GPS from the predecessor; No AA filter means it's susceptible to aliasing artifacts.

  • Read our Nikon D5500 Review

The Competition

Compared to Canon 50D

Sigma SD1 Merrill
Canon 50D
  • $8492
  • APS-C
  • Doesn't require an AA filter
  • Wider angle kit lens
  • $1000
  • APS-C
  • Lens selection
  • Less expensive

Compare Sigma SD1 Merrill vs Canon 50D

Nikon D5500
Canon 50D
  • $797
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
  • $1000
  • APS-C
  • Bigger pixels
  • Fast startup

Compare Nikon D5500 vs Canon 50D

Compared to Nikon D300S

Sigma SD1 Merrill
Nikon D300S
  • $8492
  • APS-C
  • More pixels
  • Doesn't require an AA filter
  • $1697
  • APS-C
  • Lens selection
  • Fast startup

Compare Sigma SD1 Merrill vs Nikon D300S

Nikon D5500
Nikon D300S
  • $797
  • APS-C
  • Less expensive
  • Tilt-swivel screen
  • $1697
  • APS-C
  • Bigger pixels
  • Fast startup

Compare Nikon D5500 vs Nikon D300S

Compared to Pentax K-3 II

Sigma SD1 Merrill
Pentax K-3 II
  • $8492
  • APS-C
  • Bigger pixels
  • Internal flash
  • $830
  • APS-C
  • Lens selection
  • Focus peaking

Compare Sigma SD1 Merrill vs Pentax K-3 II

Nikon D5500
Pentax K-3 II
  • $797
  • APS-C
  • Less expensive
  • Tilt-swivel screen
  • $830
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization

Compare Nikon D5500 vs Pentax K-3 II

Compared to Nikon D500

Sigma SD1 Merrill
Nikon D500
  • $8492
  • APS-C
  • Bigger pixels
  • Internal flash
  • $1598
  • APS-C
  • Lens selection
  • Shoot 4K video

Compare Sigma SD1 Merrill vs Nikon D500

Nikon D5500
Nikon D500
  • $797
  • APS-C
  • Less expensive
  • Tilt-swivel screen
  • $1598
  • APS-C
  • Shoot 4K video
  • Fast startup

Compare Nikon D5500 vs Nikon D500

Compared to Nikon D5600

Sigma SD1 Merrill
Nikon D5600
  • $8492
  • APS-C
  • Bigger pixels
  • Pentaprism viewfinder
  • $898
  • APS-C
  • Lens selection
  • Tilt-swivel screen

Compare Sigma SD1 Merrill vs Nikon D5600

Nikon D5500
Nikon D5600
  • $797
  • APS-C
  • Less expensive
  • Higher effective ISO
  • $898
  • APS-C
  • Fast startup
  • NFC

Compare Nikon D5500 vs Nikon D5600

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