• APS-C 366.6mm2
  • 20.1 megapixels
  • ISO 100 - 51,200
  • 35mm 858.0mm2
  • 45.7 megapixels
  • ISO 64 - 25,600

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Differences

Pentax K-S1 advantages over Nikon D850

  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Optional anti-aliasing filter
    Optional vs None
    Lets you choose sharper photos or reduced moiré

Nikon D850 advantages over Pentax K-S1

  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • Shoot 4K video
    4K (UHD) vs 1080p
    Make sure you have a fast computer
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • Better color depth
    26.4 vs 23.5 bits
    Capture richer, more accurate colors
  • Higher effective ISO
    2,660 vs 1,061 iso
    Take photos in low light with less noise
  • More dynamic range
    14.8 vs 13.0 evs
    Retain detail in highlight and shadows
  • Longer stills battery life
    More info 1840 vs 480 shots
    Capture more photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • More cross-type AF points
    99 vs 9
    Cross-type AF points improve autofocus performance
  • Newer
    7 years vs 10 years old
    Newer cameras often support more advanced features
  • Higher-res screen
    590k vs 307k pixels
    More detail on the screen lets you judge focus and composition
  • More viewfinder magnification
    0.75x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    45.7 vs 20.1 megapixels
    Higher resolution photos
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • More AF points
    153 vs 11
    More AF points improve autofocus
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Faster JPEG shooting
    7.1 fps vs 5.4 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    200 vs 20 shots
    Take more JPEG shots before waiting (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
  • 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

  • Tilt-swivel screen
    Neither provide
    Tilt and swivel the screen for maximum shooting flexibility
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • Built-in GPS
    Neither provide
    Geotag your photos
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance

User reviews

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Your purchases support this site

Buy the Pentax K-S1

Review Excerpt

  • Class-leading resolution; Excellent dynamic range; Very good high ISO performance; Very fast AF and burst shooting; Durable weather-sealed body; Improved ergonomics; Touchscreen; Dual card slots; 4K video.

  • Live view/video mode still uses sluggish contrast-detect AF; Viewfinder only tests at ~98% coverage; No 4K at 60p; 30-minute video clip limit; Focus peaking not supported with 4K.

The Competition

Compared to Sony A58

Pentax K-S1
Sony A58
  • $502
  • APS-C
  • Lens selection
  • Higher effective ISO
  • $598
  • APS-C
  • Less expensive
  • In-camera panoramas
Nikon D850
Sony A58
  • $2664
  • 35mm
  • Lens selection
  • Larger sensor
  • $598
  • APS-C
  • In-Camera Image Stabilization
  • In-camera panoramas

Compared to Nikon D5500

Pentax K-S1
Nikon D5500
  • $502
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $597
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
Nikon D850
Nikon D5500
  • $2664
  • 35mm
  • Focus peaking
  • Larger sensor
  • $597
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Pentax K-S2

Pentax K-S1
Pentax K-S2
  • $502
  • APS-C
  • Higher-res screen
  • $499
  • APS-C
  • Tilt-swivel screen
  • Built-in Wi-Fi
Nikon D850
Pentax K-S2
  • $2664
  • 35mm
  • Larger sensor
  • Shoot 4K video
  • $499
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Sony A99 II

Pentax K-S1
Sony A99 II
  • $502
  • APS-C
  • Lens selection
  • Internal flash
  • $3198
  • 35mm
  • Larger sensor
  • Tilt-swivel screen
Nikon D850
Sony A99 II
  • $2664
  • 35mm
  • Lens selection
  • Less expensive
  • $3198
  • 35mm
  • Tilt-swivel screen
  • In-Camera Image Stabilization

Compared to Pentax K-1 II

Pentax K-S1
Pentax K-1 II
  • $502
  • APS-C
  • Internal flash
  • Faster JPEG shooting
  • $1747
  • 35mm
  • Larger sensor
  • Tiltable Screen
Nikon D850
Pentax K-1 II
  • $2664
  • 35mm
  • Shoot 4K video
  • Touchscreen
  • $1747
  • 35mm
  • Less expensive
  • In-Camera Image Stabilization
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