• APS-C 366.6mm2
  • 24.1 megapixels
  • ISO 100 - 6400
  • APS-C 366.6mm2
  • 20.1 megapixels
  • ISO 100 - 51,200

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Differences

Nikon D7100 advantages over Pentax K-S2

  • Fast startup
    ~0.30 vs 1.0 sec
    Faster startup lets you catch the moment
  • Longer stills battery life
    More info 950 vs 410 shots
    Capture more photos
  • More telephoto lens reach
    158 mm vs 75 mm
    Capture objects farther away with the kit lens
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • More cross-type AF points
    15 vs 9
    Cross-type AF points improve autofocus performance
  • Higher-res screen
    307k vs 230k pixels
    More detail on the screen lets you judge focus and composition
  • More pixels
    24.1 vs 20.1 megapixels
    Higher resolution photos
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • More AF points
    51 vs 11
    More AF points improve autofocus
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Faster JPEG shooting
    5.8 fps vs 5.2 fps
    Faster JPEG shooting (burst mode)

Pentax K-S2 advantages over Nikon D7100

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Less expensive
    $499 vs $980
    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
  • Newer
    4 years vs 6 years old
    Newer cameras often support more advanced features
  • Lighter weight
    859g vs 1222g
    Lighter weight
  • Less shutter lag
    0.12 vs 0.25 sec
    Focus and take a photo quickly (wide angle)
  • Optional anti-aliasing filter
    Optional vs None
    Lets you choose sharper photos or reduced moiré
  • Bigger JPEG buffer
    28 vs 12 shots
    Take more JPEG shots before waiting (burst mode)
  • Bigger RAW buffer
    9 vs 5 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
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • 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

  • 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
  • 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

Buy From

Your purchases support this site

Buy the Pentax K-S2

Review Excerpt

  • Solid, ergonomic body design; Stunning, highly detailed photos, thanks to 24.1MP sensor upgrade and removal of optical low-pass filter; Cool 1.3x crop mode extends reach to nearly 2x the full-frame equivalent; Records Full 1080p HD video at up to 30fps with full-time AF; Many pro-level features packed into a consumer-friendly body at reasonable price.

  • Shallow buffer that hampers continuous burst shooting; AF slightly slower than average for its class; No real-time aperture control while in Movie mode (among other quirks); More noticeable moire patterns and aliasing artifacts (but only found when shooting fabrics with strong, distinct patterns).

  • 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

The Competition

Compared to Canon 70D

Nikon D7100
Canon 70D
  • $785
  • APS-C
  • Fast startup
  • Higher effective ISO
  • $882
  • APS-C
  • Less expensive
  • Tilt-swivel screen
Pentax K-S2
Canon 70D
  • $522
  • APS-C
  • Less expensive
  • Focus peaking
  • $882
  • APS-C
  • Touchscreen
  • Fast startup

Compared to Pentax K-3

Nikon D7100
Pentax K-3
  • $785
  • APS-C
  • Fast startup
  • Longer stills battery life
  • $699
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
Pentax K-S2
Pentax K-3
  • $522
  • APS-C
  • Less expensive
  • Tilt-swivel screen
  • $699
  • APS-C
  • Longer stills battery life
  • More telephoto lens reach

Compared to Sony A77 II

Nikon D7100
Sony A77 II
  • $785
  • APS-C
  • Lens selection
  • Less expensive
  • $1198
  • APS-C
  • Tilt-swivel screen
  • Focus peaking
Pentax K-S2
Sony A77 II
  • $522
  • APS-C
  • Lens selection
  • Less expensive
  • $1198
  • APS-C
  • In-camera panoramas
  • Top deck display

Compared to Pentax K-S1

Nikon D7100
Pentax K-S1
  • $785
  • APS-C
  • Higher effective ISO
  • Longer stills battery life
  • $399
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
Pentax K-S2
Pentax K-S1
  • $522
  • APS-C
  • Tilt-swivel screen
  • Built-in Wi-Fi
  • $399
  • APS-C
  • Higher-res screen

Compared to Nikon D5500

Nikon D7100
Nikon D5500
  • $785
  • APS-C
  • Fast startup
  • More telephoto lens reach
  • $597
  • APS-C
  • Less expensive
  • Tilt-swivel screen
Pentax K-S2
Nikon D5500
  • $522
  • APS-C
  • Focus peaking
  • Less expensive
  • $597
  • APS-C
  • Touchscreen
  • Fast startup
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