• APS-C 369.7mm2
  • 14.2 megapixels
  • ISO 100 - 12,800
  • 35mm 861.6mm2
  • 36.4 megapixels
  • ISO 100 - 204,800

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Differences

Sony A33 advantages over Pentax K-1

  • In-camera panoramas
    Yes vs No
    Stitches multiple shots into a panoramic photo
  • Fast startup
    ~0.80 vs 1.2 sec
    Faster startup lets you catch the moment
  • Internal flash
    Internal flash vs None
    Useful in a pinch for fill flash
  • Faster JPEG shooting
    7.1 fps vs 4.6 fps
    Faster JPEG shooting (burst mode)

Pentax K-1 advantages over Sony A33

  • Lens selection
    Excellent vs Good
    Better lens selection gives you more options
  • Focus peaking
    Peaker vs Non-peaker
    Your camera will highlight what's in focus
  • Larger sensor
    35mm vs APS-C
    More sensor area. Bigger is (generally) better.
  • High resolution composite
    Yes vs No
    Combine multiple shots to form a super hi-res version
  • Built-in Wi-Fi
    Wi-Fi vs None
    Share your photos wirelessly
  • Better color depth
    25.4 vs 22.8 bits
    Capture richer, more accurate colors
  • Higher effective ISO
    3,280 vs 591 iso
    Take photos in low light with less noise
  • More dynamic range
    14.6 vs 12.6 evs
    Retain detail in highlight and shadows
  • Built-in GPS
    GPS vs None
    Geotag your photos
  • Longer stills battery life
    More info 760 vs 270 shots
    Capture more photos
  • Top deck display
    Yes vs No
    Check settings with a screen on top of the camera
  • More cross-type AF points
    25 vs 3
    Cross-type AF points improve autofocus performance
  • Newer
    3 years vs 8 years old
    Newer cameras often support more advanced features
  • Shoots 24p video
    Yes vs No
    Gives your movies a big-screen feel
  • Shoots 1080p video
    Yes vs No
    You'll want this if you shoot video
  • Less shutter lag
    0.09 vs 0.21 sec
    Focus and take a photo quickly (wide angle)
  • More pixels
    36.4 vs 14.2 megapixels
    Higher resolution photos
  • Shoots 60p video
    Yes vs No
    A faster framerate can give you more editing options
  • Dual card slots
    Yes vs No
    Gives you more storage flexibility
  • More AF points
    33 vs 15
    More AF points improve autofocus
  • Headphone jack
    Yes vs No
    Monitor audio recording while you shoot video
  • Optional anti-aliasing filter
    Optional vs Fixed
    Lets you choose sharper photos or reduced moiré
  • Bigger JPEG buffer
    74 vs 13 shots
    Take more JPEG shots before waiting (burst mode)
  • Faster shutter
    1/8000 vs 1/4000 sec
    Shoot wide open in bright light
  • Higher extended ISO
    204800 vs 25600 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
  • In-Camera Image Stabilization
    Both provide
    Reduces the effects of camera shake at slower shutter speeds
  • Tiltable Screen
    Both provide
    Tilt the screen for shooting flexbility
  • External Mic Jack
    Both provide
    Improved sound fidelity when shooting video
  • 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

  • Touchscreen
    Neither provide
    Interact with your camera just like your smartphone
  • NFC
    Neither provide
    Simplifies pairing your camera with supported phones
  • Built-in Bluetooth
    Neither provide
    Always-on wireless connectivity
  • On-sensor phase detect
    Neither provide
    Usually improves live view and video AF performance
  • Slow-motion videos
    Neither provide
    Shoot slow-motion videos

User reviews

Buy From

Review Excerpt

  • Unlocks the full potential of full-frame Pentax lenses; Excellent image quality; Great ergonomics and build; Very compact for full-frame; Decent performance; Fast autofocus with great low-light capabilities; Very wide sensitivity range; Bright, accurate viewfinder; Articulated LCD; Stabilization, Wi-Fi and GPS in-camera

  • No built-in flash strobe; Quite heavy compared to APS-C flagships; Somewhat soft images and blown highlights by default in JPEG mode; Warm Auto white balance indoors; Slow startup and buffer clearing; Small top-deck status display; Weak viewfinder illumination; Below-average battery life for DSLR

The Competition

Compared to Nikon D3100

Sony A33
Nikon D3100
  • $540
  • APS-C
  • In-Camera Image Stabilization
  • In-camera panoramas
  • $700
  • APS-C
  • Lens selection
  • Fast startup
Pentax K-1
Nikon D3100
  • $1897
  • 35mm
  • Focus peaking
  • Larger sensor
  • $700
  • APS-C
  • Fast startup
  • Internal flash

Compared to Sony A55

Sony A33
Sony A55
  • $540
  • APS-C
  • $734
  • APS-C
  • Higher effective ISO
  • Built-in GPS
Pentax K-1
Sony A55
  • $1897
  • 35mm
  • Lens selection
  • Focus peaking
  • $734
  • APS-C
  • In-camera panoramas
  • Fast startup

Compared to Sony A35

Sony A33
Sony A35
  • $540
  • APS-C
  • Tiltable Screen
  • Faster JPEG shooting
  • $567
  • APS-C
  • Higher effective ISO
  • Longer stills battery life
Pentax K-1
Sony A35
  • $1897
  • 35mm
  • Lens selection
  • Focus peaking
  • $567
  • APS-C
  • In-camera panoramas
  • Fast startup

Compared to Canon 5D Mark IV

Sony A33
Canon 5D Mark IV
  • $540
  • APS-C
  • In-Camera Image Stabilization
  • In-camera panoramas
  • $2799
  • 35mm
  • Lens selection
  • Larger sensor
Pentax K-1
Canon 5D Mark IV
  • $1897
  • 35mm
  • Less expensive
  • Focus peaking
  • $2799
  • 35mm
  • Shoot 4K video
  • Touchscreen

Compared to Pentax K-1 II

Sony A33
Pentax K-1 II
  • $540
  • APS-C
  • In-camera panoramas
  • Fast startup
  • $1897
  • 35mm
  • Lens selection
  • Focus peaking
Pentax K-1
Pentax K-1 II
  • $1897
  • 35mm
  • Less expensive
  • $1897
  • 35mm
  • Newer
  • Higher extended ISO
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