• APS-C 366.6mm2
  • 20.1 megapixels
  • ISO 100 - 51,200
  • APS-C 366.6mm2
  • 24.2 megapixels
  • ISO 100 - 25,600

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Differences

Pentax K-S1 advantages over Nikon D3400

  • 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
  • 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
  • More viewfinder magnification
    0.63x vs 0.57x
    Get a bigger view of the scene through the eye-level viewfinder
  • Optional anti-aliasing filter
    Optional vs None
    Lets you choose sharper photos or reduced moiré
  • Faster shutter
    1/6000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    51200 vs 25600 ISO
    Higher extended ISO can give more low-light flexibility

Nikon D3400 advantages over Pentax K-S1

  • Built-in Bluetooth
    Yes vs No
    Always-on wireless connectivity
  • Higher effective ISO
    1,192 vs 1,061 iso
    Take photos in low light with less noise
  • Longer stills battery life
    More info 1200 vs 480 shots
    Capture more photos
  • More pixels
    24.2 vs 20.1 megapixels
    Higher resolution photos
  • Bigger JPEG buffer
    100 vs 20 shots
    Take more JPEG shots before waiting (burst mode)

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
  • 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
  • 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 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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Your purchases support this site

Buy the Pentax K-S1
Body Only
  • Body Only
  • Kit with 18-55mm and 50-200mm Lenses
All K-S1 Deals

Your purchases support this site

Buy the Nikon D3400
Kit with 18-55mm Lens (Black)
  • Kit with 18-55mm Lens (Black)
  • Kit with 18-55mm & 70-300mm Lenses (Black)
  • Kit with 18-55mm Lens (Red)
All D3400 Deals

Review Excerpt

  • Compact DSLR camera body; Excellent image quality; Reliable single-shot autofocus; Good continuous JPEG shooting performance; New kit lens has improved AF; Great value at current prices.

  • SnapBridge is slow and limited; Poor continuous autofocus; No built-in Wi-Fi; Mediocre video features.

  • Read our Nikon D3400 Review

The Competition

Compared to Canon T6i

Pentax K-S1
Canon T6i
  • $502
  • APS-C
  • Focus peaking
  • Larger sensor
  • $699
  • APS-C
  • Tilt-swivel screen
  • Touchscreen

Compare Pentax K-S1 vs Canon T6i

Nikon D3400
Canon T6i
  • $497
  • APS-C
  • Less expensive
  • Larger sensor
  • $699
  • APS-C
  • Tilt-swivel screen
  • Touchscreen

Compare Nikon D3400 vs Canon T6i

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

Compare Pentax K-S1 vs Sony A58

Nikon D3400
Sony A58
  • $497
  • APS-C
  • Lens selection
  • Fast startup
  • $598
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization

Compare Nikon D3400 vs Sony A58

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

Compare Pentax K-S1 vs Nikon D5500

Nikon D3400
Nikon D5500
  • $497
  • APS-C
  • Less expensive
  • Built-in Bluetooth
  • $697
  • APS-C
  • Tilt-swivel screen
  • Touchscreen

Compare Nikon D3400 vs Nikon D5500

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

Compare Pentax K-S1 vs Pentax K-S2

Nikon D3400
Pentax K-S2
  • $497
  • APS-C
  • Fast startup
  • Built-in Bluetooth
  • $499
  • APS-C
  • Tilt-swivel screen
  • Focus peaking

Compare Nikon D3400 vs Pentax K-S2

Compared to Nikon D5600

Pentax K-S1
Nikon D5600
  • $502
  • APS-C
  • Focus peaking
  • In-Camera Image Stabilization
  • $898
  • APS-C
  • Tilt-swivel screen
  • Touchscreen

Compare Pentax K-S1 vs Nikon D5600

Nikon D3400
Nikon D5600
  • $497
  • APS-C
  • Less expensive
  • Longer stills battery life
  • $898
  • APS-C
  • Tilt-swivel screen
  • Touchscreen

Compare Nikon D3400 vs Nikon D5600

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