• APS-C 369.7mm2
  • 16.3 megapixels
  • ISO 100 - 12,800
  • APS-C 366.6mm2
  • 24.3 megapixels
  • ISO 100 - 25,600

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Differences

Pentax K-01 advantages over Sony A5100

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • In-Camera Image Stabilization
    Yes vs No
    Reduces the effects of camera shake at slower shutter speeds
  • Bigger pixels
    ~ 4.81 vs 3.92 microns
    Better low-light and dynamic range (all else equal)
  • Longer stills battery life
    More info 500 vs 400 shots
    Capture more photos
  • External Mic Jack
    Jack vs No jack
    Improved sound fidelity when shooting video
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities

Sony A5100 advantages over Pentax K-01

  • Touchscreen
    Touch vs No touch
    Interact with your camera just like your smartphone
  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Tiltable Screen
    Tiltable vs Fixed
    Tilt the screen for shooting flexbility
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • NFC
    Yes vs No
    Simplifies pairing your camera with supported phones
  • Higher effective ISO
    1,347 vs 1,135 iso
    Take photos in low light with less noise
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • More telephoto lens reach
    75 mm vs 61 mm
    Capture objects farther away with the kit lens
  • Thinner
    35 mm vs 58 mm
    Thinner
  • Newer
    5 years vs 7 years old
    Newer cameras often support more advanced features
  • Lighter weight
    399g vs 611g
    Lighter weight
  • Less shutter lag
    0.23 vs 0.80 sec
    Focus and take a photo quickly (wide angle)
  • More pixels
    24.3 vs 16.3 megapixels
    Higher resolution photos
  • Wider angle kit lens
    24 mm vs 61 mm
    Capture more of the scene with the included lens
  • Bigger JPEG buffer
    67 vs 9 shots
    Take more JPEG shots before waiting (burst mode)

Similarities

Common Strengths

  • Focus peaking
    Both provide
    Your camera will highlight what's in focus
  • Internal flash
    Both provide
    Useful in a pinch for fill flash
  • HDMI out
    Both provide
    Use HDMI output to monitor or review video
  • 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
  • Eye-level viewfinder
    Neither provide
    You'll be able to frame photos even when the sun is out
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • 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
  • Headphone jack
    Neither provide
    Monitor audio recording while you shoot video
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

Your purchases support this site

Buy the Sony A5100

Review Excerpt

  • Very good image quality and excellent high ISO performance. Premium build quality. In-body image stabilization. Lots of creative features. Full HD movie capture with manual exposure control.

  • Barely any smaller than a standard SLR, but lacks viewfinder and phase-detect autofocus. Contrast-detect AF is slow and unreliable. Body design is clumsy and uncomfortable. Very slow raw burst shooting.

  • Very small and comfortable form factor; Very good image quality for its class; New dual video record function; Quick autofocus and good dynamic range.

  • Lacks an EVF and external mode dial; No hot shoe; JPEG processing at higher ISOs not as good as some competing mid-level models.

The Competition

Compared to Samsung NX20

Pentax K-01
Samsung NX20
  • $359
  • APS-C
  • Lens selection
  • Focus peaking
  • $499
  • APS-C
  • Eye-level viewfinder
  • Tiltable Screen
Sony A5100
Samsung NX20
  • $448
  • APS-C
  • Lens selection
  • Focus peaking
  • $499
  • APS-C
  • Eye-level viewfinder
  • Hot shoe

Compared to Sony NEX-F3

Pentax K-01
Sony NEX-F3
  • $359
  • APS-C
  • Lens selection
  • Focus peaking
  • $600
  • APS-C
  • Less expensive
  • In-camera panoramas
Sony A5100
Sony NEX-F3
  • $448
  • APS-C
  • Focus peaking
  • Touchscreen
  • $600
  • APS-C
  • Bigger pixels
  • Fast startup

Compared to Fujifilm X-E1

Pentax K-01
Fujifilm X-E1
  • $359
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization
  • $499
  • APS-C
  • Eye-level viewfinder
  • In-camera panoramas
Sony A5100
Fujifilm X-E1
  • $448
  • APS-C
  • Less expensive
  • Touchscreen
  • $499
  • APS-C
  • Eye-level viewfinder
  • Bigger pixels

Compared to Samsung NX1100

Pentax K-01
Samsung NX1100
  • $359
  • APS-C
  • Lens selection
  • Focus peaking
  • $450
  • APS-C
  • Built-in Wi-Fi
  • More telephoto lens reach
Sony A5100
Samsung NX1100
  • $448
  • APS-C
  • Lens selection
  • Focus peaking
  • $450
  • APS-C
  • Less expensive
  • Higher-res screen

Compared to Sony A5000

Pentax K-01
Sony A5000
  • $359
  • APS-C
  • Lens selection
  • In-Camera Image Stabilization
  • $541
  • APS-C
  • In-camera panoramas
  • Tiltable Screen
Sony A5100
Sony A5000
  • $448
  • APS-C
  • Touchscreen
  • Higher effective ISO
  • $541
  • APS-C
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