Updated (October, 2011): Compare the Canon EOS-1D Mark III vs Canon EOS 1D X

Canon EOS-1D Mark IV

Winner
Canon EOS-1D Mark IV

68

vs

Canon EOS-1D Mark III

59

Canon EOS-1D Mark III

Runner-up
     

Reasons to buy the Canon EOS-1D Mark IV

Full HD
Movie format
1080p @ 30fps
Wide dynamic range
Dynamic range
12 EV
High resolution screen
Screen resolution
920k dots
Has live view
Live view
Preview your photos
 

Reasons to buy the Canon EOS-1D Mark III

Live view
Has live view
Preview your photos
Continuous shooting
Rapid fire
10 fps
Startup delay
Almost no delay when powering up
100 ms startup delay
Battery life
Great battery life
2200 shots
 

differences

Advantages of the Canon EOS-1D Mark III

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Battery life
Significantly longer battery life
2200 shots vs 1500 shots
Help
Around 50% more shots per battery charge
Startup delay
Less startup delay
100 ms vs 400 ms
Help
4x less delay when turning on
Viewfinder size
Slightly larger viewfinder
0.61x vs 0.59x
Help
Around 10% larger viewfinder
Shutter lag
Slightly less shutter lag
94 ms vs 104 ms
Help
Around 10% less delay when taking photos
Lowest price
Cheaper
$4,599.00 vs $5,434.02
Help
The best price we've seen is $835 cheaper (around 20% less)
Canon EOS-1D Mark III Learn more about
the Canon EOS-1D Mark III

Advantages of the Canon EOS-1D Mark IV

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Movie format
Shoots movies
1080p @ 30fps vs None
Help
Shoots Full HD (1080p) video as well as still pictures
Screen resolution
Much higher resolution screen
920k dots vs 230k dots
Help
4x higher resolution screen
Dynamic range
More dynamic range
12 EV vs 11.7 EV
Help
0.3 f-stops more dynamic range
Cross type focus points
Significantly more cross-type focus points
39 vs 19
Help
Grab focus in difficult situations
True resolution
Significantly higher true resolution
16 MP vs 10.1 MP
Help
Capture around 60% more detail in your photos
Low light performance
Slightly lower noise at high ISO
1,320 ISO vs 1,078 ISO
Help
The EOS-1D Mark IV has a slight edge (0.3 f-stops) in low noise, high ISO performance
Overall image quality
Slightly better image quality
74.0 vs 71.0
Help
Almost the same
Light sensitivity
Better maximum light sensitivity
12,800 ISO vs 3,200 ISO
Help
The EOS-1D Mark IV's maximum light sensitivity is 2 f-stops better
Light sensitivity (boost)
Better boost ISO
102,400 ISO vs 6,400 ISO
Help
The EOS-1D Mark IV's boost ISO is 4 f-stops better
Weight
Lighter
1,230 g vs 1,335 g
Help
Around 10% lighter
Canon EOS-1D Mark IV Learn more about
the Canon EOS-1D Mark IV
vs

recommendations

Which camera do we recommend? Relative to the best recent pro DSLRs, and ignoring price

Snapsort Recommends
Canon EOS-1D Mark III Canon EOS-1D Mark III 59
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      Color
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        68 Canon EOS-1D Mark IV Canon EOS-1D Mark IV
        Retailer
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            Color
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              similarities

              Compared to recent DSLRs

              Common Strengths
              Continuous shooting Very fast continuous shooting Help
              10 fps
              Shutter lag Incredible shutter lag Help
              EOS-1D Mark III:94 ms
              EOS-1D Mark IV:104 ms
              Battery life Great battery life Help
              EOS-1D Mark III:2200 shots
              EOS-1D Mark IV:1500 shots
              Weather sealed Weather sealed Help
              Shoot in extreme weather
              Focus points Many focus points Help
              45
              Startup delay Minimal startup delay Help
              EOS-1D Mark III:100 ms
              EOS-1D Mark IV:400 ms
              Cross type focus points Many cross-type focus points Help
              EOS-1D Mark III:19
              EOS-1D Mark IV:39
              Viewfinder Both have pentaprism viewfinders Help
              Pentaprism
              Storage slots Multiple storage slots Help
              2
              Viewfinder coverage Above average viewfinder coverage Help
              100%
              Fastest shutter speed Fast max shutter speeds Help
              1/8000 of a second
              Common Weaknesses
              Built-in flash No built-in flash Help
              Professional
              Weight Heavy Help
              EOS-1D Mark III:1,335 g
              EOS-1D Mark IV:1,230 g
              Lowest price Very expensive Help
              EOS-1D Mark III:$4,599.00
              EOS-1D Mark IV:$5,434.02
              Size Large Help
              Large 156x157x80 mm
              HDR Neither has in-camera HDR Help
              You could do HDR manually
              Thickness Quite thick Help
              3.1"
              Built-in focus motor No focus motor Help
              Won't autofocus with all lenses
              True resolution Capture low resolution images Help
              EOS-1D Mark III:10.1 MP
              EOS-1D Mark IV:16 MP
              Screen flips out No flip-out screens Help
              Less flexible
              Image stabilization No image stabilization Help
              Risk of blur
              Overall image quality Low image quality Help
              EOS-1D Mark III:71.0
              EOS-1D Mark IV:74.0

              Compared to recent pro DSLRs

              Common Strengths

              Snapsort is not aware of any interesting strengths shared by these two products.

              Common Weaknesses
              GPS No built-in GPS Help
              Missing geo-tagging
              Viewfinder size Below average viewfinder size Help
              EOS-1D Mark III:0.61x
              EOS-1D Mark IV:0.59x
              Sensor size Very small sensors Help
              EOS-1D Mark III:APS-H 28.7x18.7mm
              EOS-1D Mark IV:APS-H 27.9x18.6mm
              Screen size Very small screens Help
              3.0"
              Color depth Poor color depth Help
              EOS-1D Mark III:22.7 bits
              EOS-1D Mark IV:22.8 bits
              Screen resolution Low resolution screens Help
              EOS-1D Mark III:230k dots
              EOS-1D Mark IV:920k dots
              Low light performance Above average noise at high ISO Help
              EOS-1D Mark III:1,078 ISO
              EOS-1D Mark IV:1,320 ISO
              Dynamic range Poor dynamic range Help
              EOS-1D Mark III:11.7 EV
              EOS-1D Mark IV:12 EV

              dxomark

              DXOMark

              competitors

              Shared Competitors

              Advantages

              Disadvantages

              Canon EOS 5D Mark III

              Canon EOS 5D Mark III

              Pro DSLR

              $3,099 - $3,399 body only

              $3,699 - $3,999 with 24-105mm lens

              Low light performance Is slightly less noisy at high ISO
              Overall image quality Has slightly better image quality
              Battery life Has a slightly shorter battery life
              Continuous shooting Doesn't shoot as fast continuously
              Canon EOS 7D

              Canon EOS 7D

              Pro DSLR

              $999 - $1,499 body only

              $1,099 - $1,978 with 28-135mm lens

              Lens availability Slightly more lenses available
              Size Is much smaller
              Storage slots Has fewer storage slots
              Sensor size Has a marginally smaller sensor
              Canon EOS 5D Mark II

              Canon EOS 5D Mark II

              Pro DSLR

              $2,495 body only

              Low light performance Is slightly less noisy at high ISO
              Color depth Has slightly more color depth
              Storage slots Has fewer storage slots
              Viewfinder coverage Slightly less viewfinder coverage
              Canon EOS 6D

              Canon EOS 6D

              Pro DSLR

              $1,519 - $1,899 body only

              $2,299 - $2,499 with 24-105mm lens

              Low light performance Is slightly less noisy at high ISO
              Overall image quality Has slightly better image quality
              Fastest shutter speed Has a slower max shutter speed
              Storage slots Has fewer storage slots
              Canon EOS 7D Mark II

              Canon EOS 7D Mark II

              Pro DSLR

              $1,799 body only

              $2,149 with 18-135mm lens

              Screen resolution Has a slightly higher resolution screen
              True resolution Takes slightly higher resolution photos
              Sensor size Has a marginally smaller sensor
              Battery life Has a significantly shorter battery life
              Canon EOS-1Ds Mark III

              Canon EOS 1Ds Mark III

              Pro DSLR

              $6,000 body only

              Overall image quality Has slightly better image quality
              Color depth Has slightly more color depth
              Lowest price Is slightly more expensive
              Weight Is slightly heavier
              Canon EOS 70D

              Canon EOS 70D

              Pro DSLR

              $999 body only

              $1,129 - $1,149 with 18-55mm lens

              Screen resolution Has a slightly higher resolution screen
              True resolution Takes slightly higher resolution photos
              Storage slots Has fewer storage slots
              Viewfinder coverage Slightly less viewfinder coverage

              Canon EOS-1D Mark III Competitors

              Advantages

              Disadvantages

              Canon EOS-1Ds Mark II

              Canon EOS-1Ds Mark II

              Pro DSLR

              Viewfinder size Significantly larger viewfinder
              Low light performance Lower noise at high ISO
              Screen size Much smaller screen
              Live view No live view

              Canon EOS-1D Mark IV Competitors

              Advantages

              Disadvantages

              Canon EOS 1D X

              Canon EOS 1D X

              Pro DSLR

              $5,100 - $6,799 body only

              Low light performance Significantly lower noise at high ISO
              Viewfinder size Much larger viewfinder
              Dynamic range Less dynamic range
              Size Larger

              appearance

              Canon EOS-1D Mark III Canon EOS-1D Mark IV
              Canon EOS-1D Mark III Canon EOS-1D Mark IV
              Canon EOS-1D Mark III Canon EOS-1D Mark IV

              discussion

              Canon EOS-1D Mark III
              EOS-1D Mark III
              Canon

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              Canon EOS-1D Mark IV
              EOS-1D Mark IV
              Canon

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