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

Buy From

Differences

Pentax K-5 IIs advantages over Sony A5100

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • 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
  • Bigger pixels
    ~ 4.81 vs 3.92 microns
    Better low-light and dynamic range (all else equal)
  • Fast startup
    ~0.60 vs 2.0 sec
    Faster startup lets you catch the moment
  • More dynamic range
    14.1 vs 12.7 evs
    Retain detail in highlight and shadows
  • Longer stills battery life
    More info 740 vs 400 shots
    Capture more photos
  • 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
  • Higher-res screen
    307k vs 230k pixels
    More detail on the screen lets you judge focus and composition
  • Hot shoe
    Hot shoe vs None
    Off-camera flashes open new possibilities
  • Lacks anti-aliasing filter
    No Filter vs Filter
    Enjoy sharper photos
  • Faster JPEG shooting
    6.7 fps vs 6.0 fps
    Faster JPEG shooting (burst mode)
  • Faster RAW shooting
    6.7 fps vs 6.0 fps
    Faster RAW shooting in burst mode
  • Faster shutter
    1/8000 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

Sony A5100 advantages over Pentax K-5 IIs

  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • 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 1,208 iso
    Take photos in low light with less noise
  • On-sensor phase detect
    Yes vs No
    Usually improves live view and video AF performance
  • Thinner
    35 mm vs 73 mm
    Thinner
  • Newer
    4 years vs 6 years old
    Newer cameras often support more advanced features
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • More pixels
    24.3 vs 16.3 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • Has anti-aliasing filter
    Filter vs No Filter
    Reduces unsightly moiré in photos
  • Bigger JPEG buffer
    67 vs 28 shots
    Take more JPEG shots before waiting (burst mode)

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
  • 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
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • Built-in GPS
    Neither provide
    Geotag your photos
  • 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

  • Noticeably better sharpness than standard K-5 II; Compact yet control-rich body packs in the features; Updated autofocus system focuses in near-darkness; Fully weather-sealed; Very good dynamic range; In-body image stabilization; Dual-axis level with horizon correction.

  • Prone to moire, aliasing, and false color artifacts; Can seem intimidating at first; Fewer autofocus points than competitors; Doesn't take advantage of high-speed UHS-I flash cards; Movie feature set is very dated and file sizes huge.

  • 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 Sony A35

Pentax K-5 IIs
Sony A35
  • $623
  • APS-C
  • Lens selection
  • Fast startup
  • $567
  • APS-C
  • In-camera panoramas
  • More viewfinder magnification
Sony A5100
Sony A35
  • $348
  • APS-C
  • Focus peaking
  • Touchscreen
  • $567
  • APS-C
  • Eye-level viewfinder
  • In-Camera Image Stabilization

Compared to Sony A57

Pentax K-5 IIs
Sony A57
  • $623
  • APS-C
  • Lens selection
  • Higher effective ISO
  • $800
  • APS-C
  • Focus peaking
  • In-camera panoramas
Sony A5100
Sony A57
  • $348
  • APS-C
  • Touchscreen
  • Built-in Wi-Fi
  • $800
  • APS-C
  • Eye-level viewfinder
  • In-Camera Image Stabilization

Compared to Samsung NX1100

Pentax K-5 IIs
Samsung NX1100
  • $623
  • APS-C
  • Lens selection
  • Eye-level viewfinder
  • $450
  • APS-C
  • Built-in Wi-Fi
  • Thinner
Sony A5100
Samsung NX1100
  • $348
  • APS-C
  • Lens selection
  • Focus peaking
  • $450
  • APS-C
  • Higher-res screen
  • Hot shoe

Compared to Pentax K-500

Pentax K-5 IIs
Pentax K-500
  • $623
  • APS-C
  • Less expensive
  • Higher effective ISO
  • $597
  • APS-C
  • Focus peaking
  • Shoots 24p video
Sony A5100
Pentax K-500
  • $348
  • APS-C
  • Less expensive
  • Touchscreen
  • $597
  • APS-C
  • Lens selection
  • Eye-level viewfinder

Compared to Sony A5000

Pentax K-5 IIs
Sony A5000
  • $623
  • APS-C
  • Lens selection
  • Eye-level viewfinder
  • $448
  • APS-C
  • Focus peaking
  • In-camera panoramas
Sony A5100
Sony A5000
  • $348
  • APS-C
  • Touchscreen
  • Higher effective ISO
  • $448
  • APS-C
Compare Other Cameras?