General

Pentax K-3 II Sony SLT A77 II
Brand
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Pentax Sony
Lowest price
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$1,786.32 $1,198.00
Announced
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April 2015 April 2014

Sensor

Type
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CMOS CMOS
Crop factor
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1.5x 1.5x
Megapixels
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24.1 MP 24.7 MP
Light sensitivity
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51,200 ISO 25,600 ISO
Light sensitivity (boost)
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Unknown Unknown
Sensor cleaning
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Unknown Yes

Sensor (Advanced)

True resolution
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24.1 MP 24.7 MP
Native resolution
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6016 × 4000 5736 × 4304
Pixel size
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15.2 µm² 14.8 µm²

Screen

Type
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LCD LCD
Size
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3.2" 3"
Resolution
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1,037k dots 1,228k dots
Touch screen
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No No
Flips out
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No Yes
Live view
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Yes Yes

Lenses

Lens availability
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113 lenses 126 lenses
Lens mount
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Pentax K Sony Alpha

Form factor

Size
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131×100×77 mm 143×104×81 mm
Depth
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3" 3.2"
Weight
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800 g 647 g
Interchangeable lenses
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Yes Yes
Waterproof
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No No
Weather sealed
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Yes Yes
Built-in focus motor
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Yes No

Viewfinder

Type
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Pentaprism Digital
Viewfinder size
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0.62x 0.71x
Coverage
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100% 100%

Movies

Format
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1080p @ 60fps 1080p @ 60fps
Supports 24p
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Yes Yes
High-speed framerate
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None None
External mic jack
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Yes Yes
Autofocus
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Unknown Phase detection
Continuous focus
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n/a Yes
All formats
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  1. 720p @ 24fps
  2. 720p @ 25fps
  3. 720p @ 30fps
  4. 720p @ 50fps
  5. 720p @ 60fps
  6. 1080p @ 24fps
  7. 1080p @ 25fps
  8. 1080p @ 30fps
  9. 1080p @ 50fps
  10. 1080p @ 60fps
  1. 640 x 424 @ 30fps
  2. 1,440 x 1,080 @ 30fps
  3. 1080p @ 24fps
  4. 1080p @ 60fps

Features

Panorama
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Unknown Yes
HDR
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Yes Yes
3D
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Unknown No
Image stabilization
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  1. Sensor shift
  1. Sensor shift
Supports RAW
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Yes Yes
GPS
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Yes No

Performance

Startup delay
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Unknown Unknown
Shutter lag
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Unknown Unknown
Battery life
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720 shots 410 shots
Continuous shooting
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8.3 fps 12 fps

Focus system

Autofocus
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Phase detection Phase detection
Focus points
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27 79
Cross type focus points
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Unknown 15

Shutter

Max
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1/8000s 1/8000s
Min
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30s 30s

Flash

Built-in flash
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No Yes
Popup
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n/a Yes
External connection
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Yes Yes

Storage

Storage slots
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2 1
Supported formats
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  1. SD
  2. SD
  3. SDHC
  4. SDHC
  5. SDXC
  6. SDXC
  1. Memory Stick PRO Duo
  2. Memory Stick PRO-HG Duo
  3. SD
  4. SDHC
  5. SDXC

DXO Mark Scores

Image quality
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80.0 82.0
Color depth
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23.6 bits 24.4 bits
Dynamic range
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13.6 EV 13.4 EV
Low light performance
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1,106 ISO 1,013 ISO
Pentax K-3 II
K-3 II
Pentax

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Sony SLT A77 II
SLT A77 II
Sony

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