• APS-C 369.7mm2
  • 12.3 megapixels
  •  
  • APS-C 366.6mm2
  • 20.1 megapixels
  • ISO 100 - 51,200

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Differences

Ricoh GXR advantages over Pentax K-S1

  • Bigger pixels
    ~ 5.53 vs 4.29 microns
    Better low-light and dynamic range (all else equal)
  • Longer exposure
    180 vs 30 sec
    Long exposures for night shots

Pentax K-S1 advantages over Ricoh GXR

  • Lens selection
    Excellent vs Limited
    Better lens selection gives you more options
  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Less expensive
    $800 vs $1380 (MSRP)
    Save money for lenses or accessories
  • Eye-level viewfinder
    Eye-level vs Rear display only
    You'll be able to frame photos even when the sun is out
  • 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 320 shots
    Capture more photos
  • Newer
    10 years vs 15 years old
    Newer cameras often support more advanced features
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • More pixels
    20.1 vs 12.3 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • Bulb shutter
    Bulb vs No bulb
    Hold the shutter open manually for long exposures
  • Faster JPEG shooting
    5.4 fps vs 3.0 fps
    Faster JPEG shooting (burst mode)
  • Faster shutter
    1/6000 vs 1/3200 sec
    Shoot wide open in bright light
  • Higher extended ISO
    51200 vs 3200 ISO
    Higher extended ISO can give more low-light flexibility

Similarities

Common Strengths

  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • HDMI out
    Both provide
    Use HDMI output to monitor or review video
  • Hot shoe
    Both provide
    Off-camera flashes open new possibilities

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
  • In-camera panoramas
    Neither provide
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Neither provide
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Neither provide
    Share your photos wirelessly
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • 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
  • External Mic Jack
    Neither provide
    Improved sound fidelity when shooting video
  • Dual card slots
    Neither provide
    Gives you more storage flexibility
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

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Buy the Pentax K-S1

Review Excerpt

The Competition

Compared to Pentax K2000

Ricoh GXR
Pentax K2000
  • $1380
  • APS-C
  • HDMI out
  • Shoots 24p video
  • $556
  • APS-C
  • Less expensive
  • Lens selection
Pentax K-S1
Pentax K2000
  • $502
  • APS-C
  • Focus peaking
  • More cross-type AF points
  • $556
  • APS-C
  • Bigger pixels

Compared to Fujifilm X100

Ricoh GXR
Fujifilm X100
  • $1380
  • APS-C
  • More dots on screen
  • Longer exposure
  • $1200
  • APS-C
  • Less expensive
  • Eye-level viewfinder
Pentax K-S1
Fujifilm X100
  • $502
  • APS-C
  • Focus peaking
  • Less expensive
  • $1200
  • APS-C
  • Bigger pixels
  • Integrated ND filter

Compared to Sigma DP1 Merrill

Ricoh GXR
Sigma DP1 Merrill
  • $1380
  • APS-C
  • Longer stills battery life
  • Internal flash
  • $849
  • APS-C
  • Less expensive
  • More pixels
Pentax K-S1
Sigma DP1 Merrill
  • $502
  • APS-C
  • Focus peaking
  • Eye-level viewfinder
  • $849
  • APS-C
  • Bigger pixels

Compared to Sony A58

Ricoh GXR
Sony A58
  • $1380
  • APS-C
  • Bigger pixels
  • More dots on screen
  • $598
  • APS-C
  • Lens selection
  • Focus peaking
Pentax K-S1
Sony A58
  • $502
  • APS-C
  • Lens selection
  • Higher effective ISO
  • $598
  • APS-C
  • Less expensive
  • In-camera panoramas

Compared to Pentax K-S2

Ricoh GXR
Pentax K-S2
  • $1380
  • APS-C
  • Bigger pixels
  • Longer exposure
  • $499
  • APS-C
  • Lens selection
  • Focus peaking
Pentax K-S1
Pentax K-S2
  • $502
  • APS-C
  • Higher-res screen
  • $499
  • APS-C
  • Tilt-swivel screen
  • Built-in Wi-Fi
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