Canon 40D vs Pentax K-3 II

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Canon 40D vs Pentax K-3 II

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APS-C 369.7mm²
10.1 megapixels
ISO 100 - 1600

Go in depth with our full Canon 40D Review.
See real-world photos taken with the 40D.

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

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

Succeeded by the Canon 50D
Compare 40D vs 50D

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

Compare CANON 50D vs PENTAX K-3 III

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Differences

Canon 40D advantages over Pentax K-3 II

Bigger pixels
~ 6.10 vs 3.91 microns
Better low-light and dynamic range (all else equal)
Fast startup
~0.40 vs 1.2 sec
Faster startup lets you catch the moment
Internal flash
Internal flash vs None
Useful in a pinch for fill flash
Bigger JPEG buffer
Unlimited vs 60 shots
Take more JPEG shots before waiting (burst mode)

Pentax K-3 II advantages over Canon 40D

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
High resolution composite
Yes vs No
Combine multiple shots to form a super hi-res version
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.
K-3 II test data on DxO Mark 40D test data on DxO Mark

1,106 vs 703 iso
Take photos in low light with less noise
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 II test data on DxO Mark 40D test data on DxO Mark

13.6 vs 11.3 evs
Retain detail in highlight and shadows
Built-in GPS
GPS vs None
Geotag your photos
External Mic Jack
Jack vs No jack
Improved sound fidelity when shooting video
More cross-type AF points
25 vs 9
Cross-type AF points improve autofocus performance
Newer
10 years vs 17 years old
Newer cameras often support more advanced features
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 230k dots
Can mean greater resolution or a brighter screen
Shoots 1080p video
Yes vs No
You'll want this if you shoot video
More pixels
24.4 vs 10.1 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 9
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
8.1 fps vs 6.4 fps
Faster JPEG shooting (burst mode)
Higher extended ISO
51200 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
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
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 40D User Reviews

Amazon
Adorama
Read K-3 II User Reviews

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Review Excerpt

Read our Canon 40D Full Review

Top-notch image quality; Spectacular detail from Pixel Shift Resolution; Better performance than K-3; Geotag images with no accessories; Great ergonomics in a compact body; Clever on-demand low-pass filtering; Broad sensitivity range; Large and bright viewfinder for an APS-C camera; Dual card slots
No built-in flash strobe; No wireless flash support out of the box; AstroTracer function can be finicky; AE Lock button is poorly located; Below-average battery life for a prosumer DSLR; Requires a different battery grip accessory than its predecessors
Read our Pentax K-3 II Review

The Competition

Compared to Nikon D5500

Canon 40D

Nikon D5500

$1299
APS-C

Bigger pixels
Top deck display

$697
APS-C

Tilt-swivel screen
Touchscreen

Compare Canon 40D vs Nikon D5500

Pentax K-3 II

Nikon D5500

$830
APS-C

Focus peaking
In-Camera Image Stabilization

$697
APS-C

Less expensive
Tilt-swivel screen

Compare Pentax K-3 II vs Nikon D5500

Compared to Canon T6i

Canon 40D

Canon T6i

$1299
APS-C

Larger sensor
Bigger pixels

$699
APS-C

Tilt-swivel screen
Touchscreen

Compare Canon 40D vs Canon T6i

Pentax K-3 II

Canon T6i

$830
APS-C

Focus peaking
Larger sensor

$699
APS-C

Less expensive
Tilt-swivel screen

Compare Pentax K-3 II vs Canon T6i

Compared to Sony A68

Canon 40D

Sony A68

$1299
APS-C

Lens selection
Bigger pixels

$598
APS-C

Focus peaking
In-Camera Image Stabilization

Compare Canon 40D vs Sony A68

Pentax K-3 II

Sony A68

$830
APS-C

Lens selection
High resolution composite

$598
APS-C

Less expensive
In-camera panoramas

Compare Pentax K-3 II vs Sony A68

Compared to Pentax KP

Canon 40D

Pentax KP

$1299
APS-C

Bigger pixels
Fast startup

$999
APS-C

Focus peaking
In-Camera Image Stabilization

Compare Canon 40D vs Pentax KP

Pentax K-3 II

Pentax KP

$830
APS-C

Less expensive
Built-in GPS

$999
APS-C

Tiltable Screen
Built-in Wi-Fi

Compare Pentax K-3 II vs Pentax KP

Compared to Canon T7i

Canon 40D

Canon T7i

$1299
APS-C

Larger sensor
Bigger pixels

$700
APS-C

Tilt-swivel screen
Touchscreen

Compare Canon 40D vs Canon T7i

Pentax K-3 II

Canon T7i

$830
APS-C

Focus peaking
Larger sensor

$700
APS-C

Tilt-swivel screen
Touchscreen

Compare Pentax K-3 II vs Canon T7i

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