• APS-C 366.6mm2
  • 20.1 megapixels
  • ISO 100 - 51,200
  • 35mm 864.0mm2
  • 24.6 megapixels
  • ISO 50 - 100,000

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Differences

Pentax K-S1 advantages over Leica SL2-S

  • Less expensive
    $800 vs $4895 (MSRP)
    Save money for lenses or accessories
  • 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

Leica SL2-S advantages over Pentax K-S1

  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • Bigger pixels
    ~ 5.93 vs 4.29 microns
    Better low-light and dynamic range (all else equal)
  • Shoot 4K video
    4K (DCI) vs 1080p
    Make sure you have a fast computer
  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • 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
  • Newer
    4 years vs 10 years old
    Newer cameras often support more advanced features
  • More dots on screen
    2100k vs 922k dots
    Can mean greater resolution or a brighter screen
  • More pixels
    24.6 vs 20.1 megapixels
    Higher resolution photos
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Longer exposure
    500 vs 30 sec
    Long exposures for night shots
  • Faster JPEG shooting
    25.0 fps vs 5.4 fps
    Faster JPEG shooting (burst mode)
  • Bigger JPEG buffer
    Unlimited vs 20 shots
    Take more JPEG shots before waiting (burst mode)
  • Slow-motion videos
    Yes vs No
    Shoot slow-motion videos
  • Faster shutter
    1/16000 vs 1/6000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    100000 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
  • In-Camera Image Stabilization
    Both provide
    Reduces the effects of camera shake at slower shutter speeds
  • 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
  • Tiltable Screen
    Neither provide
    Tilt the screen for shooting flexbility
  • 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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Review Excerpt

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
Leica SL2-S
Sony A58
  • $4895
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $598
  • APS-C
  • Less expensive
  • In-camera panoramas

Compared to Nikon D5500

Pentax K-S1
Nikon D5500
  • $502
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $697
  • APS-C
  • Tilt-swivel screen
  • Touchscreen
Leica SL2-S
Nikon D5500
  • $4895
  • 35mm
  • Focus peaking
  • Larger sensor
  • $697
  • APS-C
  • Tilt-swivel screen
  • Internal flash

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
Leica SL2-S
Pentax K-S2
  • $4895
  • 35mm
  • Larger sensor
  • Bigger pixels
  • $499
  • APS-C
  • Less expensive
  • Tilt-swivel screen

Compared to Canon R6

Pentax K-S1
Canon R6
  • $502
  • APS-C
  • Internal flash
  • Optional anti-aliasing filter
  • $2149
  • 35mm
  • Tilt-swivel screen
  • Larger sensor
Leica SL2-S
Canon R6
  • $4895
  • 35mm
  • Slower slow-motion
  • High resolution composite
  • $2149
  • 35mm
  • Tilt-swivel screen
  • On-sensor phase detect

Compared to Canon R3

Pentax K-S1
Canon R3
  • $502
  • APS-C
  • Less expensive
  • Internal flash
  • $5999
  • 35mm
  • Tilt-swivel screen
  • Larger sensor
Leica SL2-S
Canon R3
  • $4895
  • 35mm
  • Less expensive
  • Slower slow-motion
  • $5999
  • 35mm
  • Tilt-swivel screen
  • On-sensor phase detect
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