Pentax K-S2 vs Sigma sd Quattro H

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Lens selection
Excellent vs Limited
Better lens selection gives you more options
Less expensive
$800 vs $1200 (MSRP)
Save money for lenses or accessories
Tilt-swivel screen
Tilt-swivel vs none
Tilt and swivel the screen for maximum shooting flexibility
In-Camera Image Stabilization
Yes vs No
Reduces the effects of camera shake at slower shutter speeds
Built-in Wi-Fi
Wi-Fi vs None
Share your photos wirelessly
NFC
Yes vs No
Simplifies pairing your camera with supported phones
Internal flash
Internal flash vs None
Useful in a pinch for fill flash
Thinner
64 mm vs 90 mm
Thinner
External Mic Jack
Jack vs No jack
Improved sound fidelity when shooting video
Shoots 24p video
Yes vs No
Gives your movies a big-screen feel
Shoots 1080p video
Yes vs No
You'll want this if you shoot video
Shoots 60p video
Yes vs No
A faster framerate can give you more editing options
Faster RAW shooting
5.2 fps vs 4.4 fps
Faster RAW shooting in burst mode
Faster shutter
1/6000 vs 1/4000 sec
Shoot wide open in bright light
Higher extended ISO
51200 vs 6400 ISO
Higher extended ISO can give more low-light flexibility

Larger sensor
APS-H vs APS-C
More sensor area. Bigger is (generally) better.
On-sensor phase detect
Yes vs No
Usually improves live view and video AF performance
More dots on screen
1620k vs 922k dots
Can mean greater resolution or a brighter screen
More viewfinder magnification
0.74x vs 0.63x
Get a bigger view of the scene through the eye-level viewfinder
More pixels
25.6 vs 20.1 megapixels
Higher resolution photos

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
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

Touchscreen
Neither provide
Interact with your camera just like your smartphone
In-camera panoramas
Neither provide
Stitches multiple shots into a panoramic photo
Built-in Bluetooth
Neither provide
Always-on wireless connectivity
Built-in GPS
Neither provide
Geotag your photos
Top deck display
Neither provide
Check settings with a screen on top of the camera
Dual card slots
Neither provide
Gives you more storage flexibility
Headphone jack
Neither provide
Monitor audio recording while you shoot video
Slow-motion videos
Neither provide
Shoot slow-motion videos

Buy the Pentax K-S2

All K-S2 Deals

Buy the Sigma sd Quattro H

All sd Quattro H Deals

Very compact for a weather-sealed DSLR; Good ergonomics and great viewfinder; Excellent image quality; Decent performance for its class; Articulated screen is great for difficult compositions; Offers features not found in other Pentax DSLRs
18-50mm kit lens is fiddly and prone to jamming when retracted; Wi-Fi is slow and unintuitive; Slow startup; Limited movie mode; Poor battery life for a DSLR; Priced too close to its enthusiast-grade sibling
Read our Pentax K-S2 Review