• APS-C 369.7mm2
  • 16.3 megapixels
  • ISO 100 - 12,800
  • 35mm 847.3mm2
  • 12.2 megapixels
  • ISO 100 - 102,400

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Differences

Pentax K-30 advantages over Sony A7S

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Fast startup
    ~1.10 vs 2.0 sec
    Faster startup lets you catch the moment
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • More pixels
    16.3 vs 12.2 megapixels
    Higher resolution photos
  • Faster JPEG shooting
    5.5 fps vs 5.0 fps
    Faster JPEG shooting (burst mode)

Sony A7S advantages over Pentax K-30

  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 8.40 vs 4.81 microns
    Better low-light and dynamic range (all else equal)
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Higher effective ISO
    3,702 vs 1,129 iso
    Take photos in low light with less noise
  • Thinner
    48 mm vs 71 mm
    Thinner
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • HDMI out
    HDMI out vs None
    Use HDMI output to monitor or review video
  • More viewfinder magnification
    0.71x vs 0.61x
    Get a bigger view of the scene through the eye-level viewfinder
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Higher extended ISO
    409600 vs 25600 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
  • 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
  • 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
  • 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

User reviews

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Buy the Pentax K-30
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  • Body Only
  • Kit with 18-135mm Lens
  • Kit with 18-55mm Lens
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Sony a7S
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Review Excerpt

  • Pentaprism viewfinder is bright and accurate; Weather-sealed body can handle direct rain; Twin control dials make exposure control a snap; Solid build; Great image quality.

  • Lower resolution than some rivals; Not as small as recent Pentax entry-level and mid-range models; A couple of ergonomic and UI quirks; Shutter isn't the quietest; 18-55 kit lens isn't weather-sealed.

  • Read our Pentax K-30 Review

  • Outstanding high ISO performance; excellent dynamic range; 4K video recording (via uncompressed HDMI); XAVC S option for HD video; Slightly improved battery life over A7/A7R; Built-in Wi-Fi & NFC connectivity.

  • 4K video requires expensive external recorder; Sluggish startup time; Loud shutter; Silent Shooting mode hurts image quality; Lacks a built-in, pop-up flash; Limited selection of native Sony FE lenses.

  • Read our Sony A7S Review

The Competition

Compared to Nikon D7000

Pentax K-30
Nikon D7000
  • $599
  • APS-C
  • Less expensive
  • Focus peaking
  • $699
  • APS-C
  • Fast startup
  • Longer stills battery life

Compare Pentax K-30 vs Nikon D7000

Sony A7S
Nikon D7000
  • $1998
  • 35mm
  • Focus peaking
  • Larger sensor
  • $699
  • APS-C
  • Lens selection
  • Fast startup

Compare Sony A7S vs Nikon D7000

Compared to Canon T4i

Pentax K-30
Canon T4i
  • $599
  • APS-C
  • Focus peaking
  • Larger sensor
  • $579
  • APS-C
  • Tilt-swivel screen
  • Touchscreen

Compare Pentax K-30 vs Canon T4i

Sony A7S
Canon T4i
  • $1998
  • 35mm
  • Focus peaking
  • Larger sensor
  • $579
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compare Sony A7S vs Canon T4i

Compared to Pentax K-5 II

Pentax K-30
Pentax K-5 II
  • $599
  • APS-C
  • Less expensive
  • Focus peaking
  • $699
  • APS-C
  • Fast startup
  • Longer stills battery life

Compare Pentax K-30 vs Pentax K-5 II

Sony A7S
Pentax K-5 II
  • $1998
  • 35mm
  • Focus peaking
  • Larger sensor
  • $699
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization

Compare Sony A7S vs Pentax K-5 II

Compared to Sony A7S II

Pentax K-30
Sony A7S II
  • $599
  • APS-C
  • Lens selection
  • Fast startup
  • $2398
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Pentax K-30 vs Sony A7S II

Sony A7S
Sony A7S II
  • $1998
  • 35mm
  • Less expensive
  • Fast startup
  • $2398
  • 35mm
  • In-Camera Image Stabilization
  • Shoot 4K video

Compare Sony A7S vs Sony A7S II

Compared to Leica M (Typ 262)

Pentax K-30
Leica M (Typ 262)
  • $599
  • APS-C
  • Lens selection
  • Focus peaking
  • $4995
  • 35mm
  • Larger sensor
  • Bigger pixels

Compare Pentax K-30 vs Leica M (Typ 262)

Sony A7S
Leica M (Typ 262)
  • $1998
  • 35mm
  • Lens selection
  • Focus peaking
  • $4995
  • 35mm
  • More pixels
  • Lacks anti-aliasing filter

Compare Sony A7S vs Leica M (Typ 262)

Compare Other Cameras?