• APS-C 372.9mm2
  • 10.2 megapixels
  • ISO 100 - 1600
  • APS-C 366.6mm2
  • 20.1 megapixels
  • ISO 100 - 51,200

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Differences

Nikon D3000 advantages over Pentax K-S1

  • Less expensive
    $600 vs $800 (MSRP)
    Save money for lenses or accessories
  • Bigger pixels
    ~ 6.10 vs 4.29 microns
    Better low-light and dynamic range (all else equal)

Pentax K-S1 advantages over Nikon D3000

  • 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
  • Higher effective ISO
    1,061 vs 563 iso
    Take photos in low light with less noise
  • More dynamic range
    13.0 vs 11.1 evs
    Retain detail in highlight and shadows
  • More cross-type AF points
    9 vs 1
    Cross-type AF points improve autofocus performance
  • Pentaprism viewfinder
    Pentaprism vs Pentamirror
    Much better viewfinder picture fidelity
  • Newer
    4 years vs 9 years old
    Newer cameras often support more advanced features
  • HDMI out
    HDMI out vs None
    Use HDMI output to monitor or review video
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • More dots on screen
    922k vs 230k dots
    Can mean greater resolution or a brighter screen
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • More viewfinder magnification
    0.63x vs 0.53x
    Get a bigger view of the scene through the eye-level viewfinder
  • More pixels
    20.1 vs 10.2 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré
  • Faster JPEG shooting
    5.4 fps vs 3.0 fps
    Faster JPEG shooting (burst mode)
  • Faster shutter
    1/6000 vs 1/4000 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

  • Eye-level viewfinder
    Both provide
    You'll be able to frame photos even when the sun is out
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • 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
  • 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
  • Top deck display
    Neither provide
    Check settings with a screen on top of the camera
  • 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 Canon XS

Nikon D3000
Canon XS
  • $450
  • APS-C
  • Less expensive
  • Larger sensor
  • $440
  • APS-C
  • Fast startup
  • Less shutter lag
Pentax K-S1
Canon XS
  • $399
  • APS-C
  • Focus peaking
  • Larger sensor
  • $440
  • APS-C
  • Bigger pixels

Compared to Sony DSLR-A230

Nikon D3000
Sony DSLR-A230
  • $450
  • APS-C
  • Lens selection
  • Faster JPEG shooting
  • $549
  • APS-C
  • In-Camera Image Stabilization
  • HDMI out
Pentax K-S1
Sony DSLR-A230
  • $399
  • APS-C
  • Lens selection
  • Focus peaking
  • $549
  • APS-C
  • Less expensive
  • Bigger pixels

Compared to Sony DSLR-A330

Nikon D3000
Sony DSLR-A330
  • $450
  • APS-C
  • Lens selection
  • More viewfinder magnification
  • $530
  • APS-C
  • In-Camera Image Stabilization
  • Tiltable Screen
Pentax K-S1
Sony DSLR-A330
  • $399
  • APS-C
  • Lens selection
  • Focus peaking
  • $530
  • APS-C
  • Less expensive
  • Bigger pixels

Compared to Nikon D3300

Nikon D3000
Nikon D3300
  • $450
  • APS-C
  • Bigger pixels
  • Has anti-aliasing filter
  • $443
  • APS-C
  • In-camera panoramas
  • Fast startup
Pentax K-S1
Nikon D3300
  • $399
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $443
  • APS-C
  • In-camera panoramas
  • Higher effective ISO

Compared to Pentax K-S2

Nikon D3000
Pentax K-S2
  • $450
  • APS-C
  • Bigger pixels
  • Fast startup
  • $499
  • APS-C
  • Focus peaking
  • Tilt-swivel screen
Pentax K-S1
Pentax K-S2
  • $399
  • APS-C
  • Higher-res screen
  • $499
  • APS-C
  • Tilt-swivel screen
  • Built-in Wi-Fi
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