Pentax K-3 vs Sony A99 II

Cameras
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Pentax K-3 vs Sony A99 II

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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.

35mm 861.6mm²
42.4 megapixels
ISO 100 - 25,600

Go in depth with our full Sony A99 II Review.
How does it shoot? Sony A99 II in the real world.
See real-world photos taken with the A99 II.
Compare Sony A99 II image quality against competitors.
What’s the bottom line? Read our Sony A99 II conclusion.

Succeeded by the Pentax K-3 II
Compare K-3 vs K-3 II
Compare Pentax K-3 II vs Sony A99 II

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Differences

Pentax K-3 advantages over Sony A99 II

Lens selection
Excellent vs Good
Better lens selection gives you more options
Fast startup
~0.90 vs 1.2 sec
Faster startup lets you catch the moment
Internal flash
Internal flash vs None
Useful in a pinch for fill flash
More cross-type AF points
25 vs 15
Cross-type AF points improve autofocus performance
Optional anti-aliasing filter
Optional vs None
Lets you choose sharper photos or reduced moiré

Sony A99 II advantages over Pentax K-3

Larger sensor
35mm vs APS-C
More sensor area. Bigger is (generally) better.
Tilt-swivel screen
Tilt-swivel vs none
Tilt and swivel the screen for maximum shooting flexibility
Bigger pixels
~ 4.51 vs 3.91 microns
Better low-light and dynamic range (all else equal)
Shoot 4K video
4K (UHD) vs 1080p
Make sure you have a fast computer
In-camera panoramas
Yes vs No
Stitches multiple shots into a panoramic photo
Built-in Wi-Fi
Wi-Fi vs None
Share your photos wirelessly
NFC
Yes vs No
Simplifies pairing your camera with supported phones
Built-in Bluetooth
Yes vs No
Always-on wireless connectivity
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.
A99 II test data on DxO Mark K-3 test data on DxO Mark

2,317 vs 1,216 iso
Take photos in low light with less noise
On-sensor phase detect
Yes vs No
Usually improves live view and video AF performance
More viewfinder magnification
0.78x vs 0.63x
Get a bigger view of the scene through the eye-level viewfinder
More pixels
42.4 vs 24.4 megapixels
Higher resolution photos
More AF points
79 vs 27
More AF points improve autofocus
Faster JPEG shooting
10.5 fps vs 7.1 fps
Faster JPEG shooting (burst mode)
Faster RAW shooting
11.1 fps vs 7.1 fps
Faster RAW shooting in burst mode
Slow-motion videos
Yes vs No
Shoot slow-motion videos
Higher extended ISO
102400 vs 51200 ISO
Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

Focus peaking
Both provide
Your camera will highlight what's in focus
Eye-level viewfinder
Both provide
You'll be able to frame photos even when the sun is out
In-Camera Image Stabilization
Both provide
Reduces the effects of camera shake at slower shutter speeds
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
HDMI out
Both provide
Use HDMI output to monitor or review video
Hot shoe
Both provide
Off-camera flashes open new possibilities
Dual card slots
Both provide
Gives you more storage flexibility
Headphone jack
Both provide
Monitor audio recording while you shoot video
Bulb shutter
Both provide
Hold the shutter open manually for long exposures

Common Weaknesses

Touchscreen
Neither provide
Interact with your camera just like your smartphone
Built-in GPS
Neither provide
Geotag your photos

User reviews

Amazon
Adorama
Read K-3 User Reviews

Amazon
Adorama
Read A99 II User Reviews

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Body Only
Kit with 18-135mm Lens

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All A99 II Deals

Review Excerpt

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

Superb image quality at low, moderate ISOs; Improved high ISO performance; Fast continuous shooting speeds; Very impressive hybrid autofocus; High-quality 4K UHD video; Rugged camera body.
Multi-selector joystick can be awkward to use; No EVF live view at fastest burst rate; Buffer clearing is slow with no UHS-II support; 4K UHD video isn't as full-featured as E-mount counterparts.
Read our Sony A99 II Review

The Competition

Compared to Nikon D7100

Pentax K-3

Nikon D7100

$699
APS-C

Focus peaking
In-Camera Image Stabilization

$690
APS-C

Fast startup
Longer stills battery life

Compare Pentax K-3 vs Nikon D7100

Sony A99 II

Nikon D7100

$3198
35mm

Focus peaking
Larger sensor

$690
APS-C

Less expensive
Lens selection

Compare Sony A99 II vs Nikon D7100

Compared to Nikon D5300

Pentax K-3

Nikon D5300

$699
APS-C

Focus peaking
In-Camera Image Stabilization

$549
APS-C

Tilt-swivel screen
Fast startup

Compare Pentax K-3 vs Nikon D5300

Sony A99 II

Nikon D5300

$3198
35mm

Focus peaking
Larger sensor

$549
APS-C

Lens selection
Less expensive

Compare Sony A99 II vs Nikon D5300

Compared to 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

Sony A99 II

Nikon D7200

$3198
35mm

Focus peaking
Larger sensor

$1016
APS-C

Less expensive
Lens selection

Compare Sony A99 II vs Nikon D7200

Compared to Canon 5D Mark IV

Pentax K-3

Canon 5D Mark IV

$699
APS-C

Focus peaking
In-Camera Image Stabilization

$2249
35mm

Larger sensor
Bigger pixels

Compare Pentax K-3 vs Canon 5D Mark IV

Sony A99 II

Canon 5D Mark IV

$3198
35mm

Focus peaking
Tilt-swivel screen

$2249
35mm

Lens selection
Bigger pixels

Compare Sony A99 II vs Canon 5D Mark IV

Compared to Nikon D850

Pentax K-3

Nikon D850

$699
APS-C

In-Camera Image Stabilization
Internal flash

$2597
35mm

Larger sensor
Shoot 4K video

Compare Pentax K-3 vs Nikon D850

Sony A99 II

Nikon D850

$3198
35mm

Tilt-swivel screen
In-Camera Image Stabilization

$2597
35mm

Lens selection
Less expensive

Compare Sony A99 II vs Nikon D850

Compare Other Cameras?