• 35mm 864.0mm2
  • 21.1 megapixels
  • ISO 100 - 1600
  • APS-C 372.9mm2
  • 12.3 megapixels
  • ISO 200 - 3200

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Differences

Canon 1Ds Mark III advantages over Nikon D300S

  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 6.41 vs 5.50 microns
    Better low-light and dynamic range (all else equal)
  • Higher effective ISO
    1,663 vs 787 iso
    Take photos in low light with less noise
  • Longer stills battery life
    More info 1800 vs 950 shots
    Capture more photos
  • Less shutter lag
    0.07 vs 0.23 sec
    Focus and take a photo quickly (wide angle)
  • More viewfinder magnification
    0.75x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    21.1 vs 12.3 megapixels
    Higher resolution photos

Nikon D300S advantages over Canon 1Ds Mark III

  • Fast startup
    ~0.30 vs 0.5 sec
    Faster startup lets you catch the moment
  • 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
  • HDMI out
    HDMI out vs None
    Use an external screen to monitor or review video
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Lighter weight
    951g vs 1425g
    Lighter weight
  • More dots on screen
    922k vs 230k dots
    Can mean greater resolution or a brighter screen
  • Faster JPEG shooting
    7.1 fps vs 5.0 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    26 vs 8 shots
    Take more JPEG shots before waiting (burst mode)
  • Higher extended ISO
    6400 vs 3200 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
  • Top deck display
    Both provide
    Check settings with a screen on top of the camera
  • Pentaprism viewfinder
    Both provide
    Much better viewfinder picture fidelity
  • Hot shoe
    Both provide
    Off-camera flashes open new possibilities
  • Dual card slots
    Both provide
    Gives you more storage flexibility
  • 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
  • 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
  • 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
  • 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

  • Rugged construction; 51-point AF system capable of sophisticated AF tracking; Large, bright optical viewfinder; 7 fps JPEG or 12-bit RAW burst mode; HD Video capture.

  • 14-bit RAW mode slows continuous shooting from 7 fps to 2.7 fps; Somewhat slow AF for a camera at this level, especially in 51-point auto-area mode; Video capture tops out at 720p24.

The Competition

Compared to Nikon D90

Canon 1Ds Mark III
Nikon D90
  • $7999
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $1300
  • APS-C
  • Less expensive
  • Fast startup
Nikon D300S
Nikon D90
  • $1299
  • APS-C
  • External Mic Jack
  • More cross-type AF points
  • $1300
  • APS-C
  • Higher effective ISO
  • Bigger JPEG buffer

Compared to Canon 50D

Canon 1Ds Mark III
Canon 50D
  • $7999
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $1000
  • APS-C
  • Less expensive
  • Fast startup
Nikon D300S
Canon 50D
  • $1299
  • APS-C
  • Higher effective ISO
  • Longer stills battery life
  • $1000
  • APS-C
  • Less shutter lag
  • More pixels

Compared to Sony DSLR-A550

Canon 1Ds Mark III
Sony DSLR-A550
  • $7999
  • 35mm
  • Lens selection
  • Larger sensor
  • $859
  • APS-C
  • Less expensive
  • In-Camera Image Stabilization
Nikon D300S
Sony DSLR-A550
  • $1299
  • APS-C
  • Lens selection
  • Fast startup
  • $859
  • APS-C
  • In-Camera Image Stabilization
  • Tiltable Screen

Compared to Sony DSLR-A500

Canon 1Ds Mark III
Sony DSLR-A500
  • $7999
  • 35mm
  • Lens selection
  • Larger sensor
  • $850
  • APS-C
  • Less expensive
  • In-Camera Image Stabilization
Nikon D300S
Sony DSLR-A500
  • $1299
  • APS-C
  • Lens selection
  • Fast startup
  • $850
  • APS-C
  • In-Camera Image Stabilization
  • Tiltable Screen

Compared to Sigma SD1 Merrill

Canon 1Ds Mark III
Sigma SD1 Merrill
  • $7999
  • 35mm
  • Lens selection
  • Larger sensor
  • $2049
  • APS-C
  • Internal flash
  • Newer
Nikon D300S
Sigma SD1 Merrill
  • $1299
  • APS-C
  • Lens selection
  • Less expensive
  • $2049
  • APS-C
  • More pixels
  • Doesn't require an AA filter
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