Canon 5D Mark II vs Pentax K-3

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Canon 5D Mark II vs Pentax K-3

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35mm 864.0mm²
21.1 megapixels
ISO 100 - 6400

Go in depth with our full Canon 5D Mark II Review.
See real-world photos taken with the 5D Mark II.

APS-C 366.6mm²
24.4 megapixels
ISO 100 - 51,200

Go in depth with our full Pentax K-3 Review.
How does it shoot? Pentax K-3 in the real world.
See real-world photos taken with the K-3.
Compare Pentax K-3 image quality against competitors.
What’s the bottom line? Read our Pentax K-3 conclusion.

Succeeded by the Canon 5D Mark III
Compare 5D Mark II vs 5D Mark III

Succeeded by the Pentax K-3 II
Compare K-3 vs K-3 II

Compare CANON 5D MARK III vs PENTAX K-3 II

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Differences

Canon 5D Mark II advantages over Pentax K-3

Larger sensor
35mm vs APS-C
More sensor area. Bigger is (generally) better.
Bigger pixels
~ 6.41 vs 3.91 microns
Better low-light and dynamic range (all else equal)
Fast startup
~0.40 vs 0.9 sec
Faster startup lets you catch the moment
Higher effective ISO

Higher effective ISO

Maximum effective ISO is an estimate of the highest sensitivity at which a camera can capture excellent quality photos.

Cameras with higher effective ISO will be better choices for indoor photography, night shooting, and indoor sports photography, especially if you intend to make large prints.

You can learn more at our glossary entry.

Maximum effective ISO test data courtesy of DxO Mark.
5D Mark II test data on DxO Mark K-3 test data on DxO Mark

1,815 vs 1,216 iso
Take photos in low light with less noise
Longer stills battery life
More info

Longer stills battery life

Cameras with longer battery life can take more photos before exhausting their batteries.

Special note: The measurement standard for battery life stipulates that if a camera has an internal flash, it must be used for 50% of photos taken. For this reason, comparisons of one camera with an internal flash to another without will not be comparable

850 vs 560 shots
Capture more photos
More viewfinder magnification
0.71x vs 0.63x
Get a bigger view of the scene through the eye-level viewfinder
Wider angle kit lens
24 mm vs 27 mm
Capture more of the scene with the included lens

Pentax K-3 advantages over Canon 5D Mark II

Focus peaking
Peaker vs Non-peaker
Your camera will highlight what's in focus
In-Camera Image Stabilization
Yes vs No
Reduces the effects of camera shake at slower shutter speeds
More dynamic range

More dynamic range

Cameras with more dynamic range allow you to take photos with dramatic differences in highlight and shadow areas while retaining detail in both.

Think of a brilliant sunset on a rocky beach: Bright sunset in the background, with dark rocks in the foreground. High dynamic range means more of the extremes will be faithfully reproduced.

Dynamic range test data courtesy of DxO Mark.
K-3 test data on DxO Mark 5D Mark II test data on DxO Mark

13.4 vs 11.9 evs
Retain detail in highlight and shadows
More telephoto lens reach
203 mm vs 105 mm
Capture objects farther away with the kit lens
Internal flash
Internal flash vs None
Useful in a pinch for fill flash
More cross-type AF points
25 vs 1
Cross-type AF points improve autofocus performance
Newer
11 years vs 16 years old
Newer cameras often support more advanced features
Shoots 24p video
Yes vs No
Gives your movies a big-screen feel
Less shutter lag
0.14 vs 0.21 sec
Focus and take a photo quickly (wide angle)
More pixels
24.4 vs 21.1 megapixels
Higher resolution photos
Shoots 60p video
Yes vs No
A faster framerate can give you more editing options
Dual card slots
Yes vs No
Gives you more storage flexibility
More AF points
27 vs 15
More AF points improve autofocus
Headphone jack
Yes vs No
Monitor audio recording while you shoot video
Optional anti-aliasing filter
Optional vs Fixed
Lets you choose sharper photos or reduced moiré
Faster JPEG shooting
7.1 fps vs 3.9 fps
Faster JPEG shooting (burst mode)
Faster RAW shooting
7.1 fps vs 3.9 fps
Faster RAW shooting in burst mode
Bigger RAW buffer
24 vs 11 shots
Larger buffer for RAW shots (burst mode)
Higher extended ISO
51200 vs 25600 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
External Mic Jack
Both provide
Improved sound fidelity when shooting video
Pentaprism viewfinder
Both provide
Much better viewfinder picture fidelity
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
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
On-sensor phase detect
Neither provide
Usually improves live view and video AF performance
Slow-motion videos
Neither provide
Shoot slow-motion videos

User reviews

Amazon
Adorama
Read K-3 User Reviews

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Buy the Canon 5D Mark II

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Kit with 24-105mm f/4 lens

All 5D Mark II Deals

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Buy the Pentax K-3

Body Only

Body Only
Kit with 18-135mm Lens

All K-3 Deals

Review Excerpt

Read our Canon 5D Mark II Full Review

Top-notch image quality; Great ergonomics in a compact body; Unique on-demand low-pass filtering; Broad sensitivity range; Large and bright viewfinder for an APS-C camera; Dual card slots; Optional Wi-Fi remote control
AE Lock button is poorly located; Below-average battery life for a DSLR; Rather dated-looking menu system; Requires a different battery grip accessory than its predecessors; Less third-party support than some rivals
Read our Pentax K-3 Review

The Competition

Compared to Nikon D3X

Canon 5D Mark II

Nikon D3X

$1200
35mm

Shoots 1080p video
Bigger JPEG buffer

$2500
35mm

Fast startup
More dynamic range

Compare Canon 5D Mark II vs Nikon D3X

Pentax K-3

Nikon D3X

$699
APS-C

Focus peaking
Less expensive

$2500
35mm

Larger sensor
Bigger pixels

Compare Pentax K-3 vs Nikon D3X

Compared to Nikon D600

Canon 5D Mark II

Nikon D600

$1200
35mm

More telephoto lens reach
Bigger JPEG buffer

$1900
35mm

Fast startup
Higher effective ISO

Compare Canon 5D Mark II vs Nikon D600

Pentax K-3

Nikon D600

$699
APS-C

Less expensive
Focus peaking

$1900
35mm

Larger sensor
Bigger pixels

Compare Pentax K-3 vs Nikon D600

Compared to Canon 6D

Canon 5D Mark II

Canon 6D

$1200
35mm

Less shutter lag
More AF points

$1699
35mm

Less expensive
Built-in Wi-Fi

Compare Canon 5D Mark II vs Canon 6D

Pentax K-3

Canon 6D

$699
APS-C

Focus peaking
In-Camera Image Stabilization

$1699
35mm

Larger sensor
Bigger pixels

Compare Pentax K-3 vs Canon 6D

Compared to Nikon D7100

Canon 5D Mark II

Nikon D7100

$1200
35mm

Larger sensor
Bigger pixels

$810
APS-C

Less expensive
Fast startup

Compare Canon 5D Mark II vs Nikon D7100

Pentax K-3

Nikon D7100

$699
APS-C

Focus peaking
In-Camera Image Stabilization

$810
APS-C

Fast startup
Longer stills battery life

Compare Pentax K-3 vs Nikon D7100

Compared to Nikon D7200

Canon 5D Mark II

Nikon D7200

$1200
35mm

Larger sensor
Bigger pixels

$1016
APS-C

Less expensive
Built-in Wi-Fi

Compare Canon 5D Mark II vs Nikon D7200

Pentax K-3

Nikon D7200

$699
APS-C

Focus peaking
In-Camera Image Stabilization

$1016
APS-C

Fast startup
Built-in Wi-Fi

Compare Pentax K-3 vs Nikon D7200

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