• APS-C 366.6mm2
  • 20.1 megapixels
  • ISO 100 - 51,200
  • 35mm 861.6mm2
  • 26.2 megapixels
  • ISO 100 - 40,000

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Differences

Pentax K-S1 advantages over Canon EOS RP

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Longer stills battery life
    More info 480 vs 250 shots
    Capture more photos
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré
  • Faster shutter
    1/6000 vs 1/4000 sec
    Shoot wide open in bright light

Canon EOS RP advantages over Pentax K-S1

  • Tilt-swivel screen
    Tilt-swivel vs none
    Tilt and swivel the screen for maximum shooting flexibility
  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 5.75 vs 4.29 microns
    Better low-light and dynamic range (all else equal)
  • 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
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • More telephoto lens reach
    105 mm vs 83 mm
    Capture objects farther away with the kit lens
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Newer
    2 years vs 7 years old
    Newer cameras often support more advanced features
  • More viewfinder magnification
    0.70x vs 0.63x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    26.2 vs 20.1 megapixels
    Higher resolution photos
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Wider angle kit lens
    24 mm vs 27 mm
    Capture more of the scene with the included lens
  • Bigger JPEG buffer
    Unlimited vs 20 shots
    Take more JPEG shots before waiting (burst mode)
  • Higher extended ISO
    102400 vs 51200 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
  • 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

  • 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
  • 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
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

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Your purchases support this site

Buy the Pentax K-S1

Review Excerpt

  • Very good image quality; Good high ISO performance; Fast Dual Pixel CMOS AF autofocus system; Eye AF with tracking & video support; 4K video; Good build quality; Excellent value.

  • No IBIS; Sub-par dynamic range; Burst shooting tops out at 5fps; Poor battery life; Limited video features.

The Competition

Compared to Sony A58

Pentax K-S1
Sony A58
  • $502
  • APS-C
  • Lens selection
  • Higher effective ISO
  • $598
  • APS-C
  • In-camera panoramas
  • Tiltable Screen
Canon EOS RP
Sony A58
  • $999
  • 35mm
  • Tilt-swivel screen
  • Larger sensor
  • $598
  • APS-C
  • Less expensive
  • Focus peaking

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
Canon EOS RP
Nikon D5500
  • $999
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $597
  • APS-C
  • Less expensive
  • Fast startup

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
Canon EOS RP
Pentax K-S2
  • $999
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $499
  • APS-C
  • Less expensive
  • Focus peaking

Compared to Nikon Z5

Pentax K-S1
Nikon Z5
  • $502
  • APS-C
  • Internal flash
  • Optional anti-aliasing filter
  • $997
  • 35mm
  • Larger sensor
  • Bigger pixels
Canon EOS RP
Nikon Z5
  • $999
  • 35mm
  • Tilt-swivel screen
  • Lighter weight
  • $997
  • 35mm
  • Less expensive
  • Focus peaking

Compared to Sony A7C

Pentax K-S1
Sony A7C
  • $502
  • APS-C
  • Lens selection
  • More telephoto lens reach
  • $1798
  • 35mm
  • Tilt-swivel screen
  • Larger sensor
Canon EOS RP
Sony A7C
  • $999
  • 35mm
  • More telephoto lens reach
  • Wider angle kit lens
  • $1798
  • 35mm
  • Focus peaking
  • In-Camera Image Stabilization
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