Sony Alpha a6700 vs. Pentax K-3 III - Camera Comparison

Comparison of the Sony Alpha a6700 and the Pentax K-3 III

Sony Alpha a6700
81 points
Pentax K-3 III
85 points
Sony Alpha a6700
Sony Alpha a6700 ✭ Camspex.com
69 mm
122 mm
BODY
Pentax K-3 III
Pentax K-3 III ✭ Camspex.com
104 mm
135 mm
2023
YEARYear of announcement
2021
Magnesium alloy
BODY MATERIAL
Magnesium alloy
Weather
sealed
WEATHER SEALING
Weather
sealed
Sony E
LENS MOUNT
Pentax KAF2
200 000 cycles
SHUTTER LIFEThe shutter durability as rated by the manufacturer.
300 000 cycles
493 g
1.09 lb
122 x 69 x 75 mm
4.8 x 2.7 x 3 in.
DIMENSIONS
& WEIGHTLength x Height x Width and the Weight incl. batteries and memory card
DIMENS.
& WEIGHTLength x Height x Width and the Weight incl. batteries and memory card
135 x 104 x 74 mm
5.3 x 4.1 x 2.9 in.
820 g
1.81 lb
Sony Alpha a6700
Pentax K-3 III
26.0 MP
Sony Exmor R CMOS APS-C Sensor
SENSOR The number of effective megapixels (MP). Sensor manufacturer (if known) and sensor type.
SENSOR Sensor manufacturer (if known) and sensor type.
25.7 MP
Sony IMX571 Exmor RS CMOS APS-C Sensor
26.0 MP
EFFECTIVE MEGAPIX The number of effective megapixels (MP).
25.7 MP
23.3 x 15.5 mm
SENSOR SIZE
23.3 x 15.5 mm
6192 x 4128 pixels
MAX. RESOLUTIONMaximum still image resolution
MAX. RESOLUT.Maximum still image resolution
6192 x 4128 pixels
1.5x
CROP FACTORA 50mm lens on a camera with a crop factor of 1.5x would behave like a 75mm lens on a full-frame camera with a crop factor of 1x (50mm x 1.5 = 75mm)
1.5x
Bayer array
COLOR FILTER
Bayer array
3.76 μm
PIXEL PITCHThe center-to-center distance between two pixels (photosites) on a sensor. The larger the photosites, the more light they can capture and the lower is the level of visible "noise" in captured images.
3.76 μm
None
LOW-PASS FILTERA low-pass filter blurs fine details of an image to eliminate the moiré and the color artifacts of finely patterned structures. Without a low-pass filter images will appear sharper, but there is also a risk of moiré occurring in certain scenes.
None (with anti-aliasing simulator)
3:2
NATIVE
ASPECT RATIOThe width to height ratio of the "straight out of the camera" images. However, most modern digital cameras are capable of producing images in various aspect ratios.
ASPECT RATIOThe width to height ratio of the "straight out of the camera" images. However, most modern digital cameras are capable of producing images in various aspect ratios.
3:2
Sony Alpha a6700
DXOMARK
SENSOR
SCOREAnalysis of the camera image quality by dxomark.com
Pentax K-3 III
 
Not tested
OVERALL SCOREDXOMARK Sensor Overall Score shows a camera's sensor quality in terms of noise, ability to render high contrast, formation of colored noise, ability to shoot in low light.
Not tested
 
 
Not tested
COLOR DEPTHThe color depth performance (DXOMARK Portrait Score) in bits
Not tested
 
 
Not tested
DYNAMIC RANGEThe maximum dynamic range performance (DXOMARK Landscape Score) in exposure value (EV)
Not tested
 
 
Not tested
LOW-LIGHT ISOThe low-light sensitivity performance (DXOMARK Sports Score) in ISO sensitivity value
Not tested
 
Sony Alpha a6700
Pentax K-3 III
COVERAGE:
100 %
REAL SIZE:
0.70
VIEW­FINDERThe viewfinder frame COVERAGE in percent and the real viewfinder SIZE (VF magnification corrected by the crop factor of a camera — this way cameras with different sensor sizes can be compared).
COVERAGE:
100 %
REAL SIZE:
0.70
Electronic (2 359 296 dot OLED)
VF TYPE
Optical (pentaprism)
Articulated
 1 036 800 dot LCD
REAR SCREEN
Fixed 
1 620 000 dot LCD
3 inch
SCREEN SIZE
3.2 inch
LIVE VIEW & TOUCH SCREEN
No top LCD panel
TOP LCD PANELLCD panel on top of the camera which provides information about the current camera settings.
camspex.com — Top plate LCD — Pentax K-3 III
Sony Alpha a6700
Pentax K-3 III
Hybrid detection
AUTOFOCUS SYSTEM
AF SYSTEM
Phase detection, Contrast detection in Live View mode
Fast Hybrid AF
AUTOFOCUS MODULE
AF MODULE
SAFOX 13
759 (phase)  
425 (contrast)
759
 (phase)  
425
 (contrast)
FOCUS POINTSAutofocus points
as shown in the figures below:

° linear sensors
° cross-type sensors
° dual cross-type sensors
contrast autofocus areas
101
101
0
CROSS-TYPE FOCUS POINTS
CROSS-TYPE FP
25
camspex.com — Autofocus system — Sony Alpha a6700
-3
EV

100

The minimum exposure value of the AF working range (at 23°C and ISO 100). The smaller this value, the less light is needed for normal autofocus operation.
-4
camspex.com — Autofocus system — Pentax K-3 III
93 %
AF COVERAGEFrame coverage by AF sensors in percent.
32 %
None
IN-BODY
AF MOTORAn in-body AF motor gives the ability to auto-focus with older lenses which don't have their own motors.
Yes
5-axis sensor shift
IN-BODY IMAGE STABILIZATION
IMAGE STABILIZ.
5-axis sensor shift
Sony Alpha a6700
Pentax K-3 III
BIONZ XR
IMAGE
PROCESSOR
PRIME V
14 bit RAW, 10 bit HEIF, JPEG
OUTPUT FORMATS
14 bit RAW, DNG, JPEG
Auto, 100 – 32000
(can be extended to ISO 50 - 102400)
ISO SEN­SITIVITY
Auto, 100 - 1600000
11
fps
CONTINUOUS DRIVEMaximum frames per second (fps) in continuous drive mode when using the mechanical shutter.
CONT. DRIVEMaximum frames per second (fps) in continuous drive mode when using the mechanical shutter.
12
fps
143 JPEG shots
23 RAW shots
MAX. BURSTMaximum number of shots in high-speed continuous drive mode until the buffer is full.
37 JPEG shots
32 RAW shots
2160p @ 120 fps (4K)
MAX. VIDEO RESOLUTION
VIDEO
2160p @ 30 fps (4K)
-5/+5 EV  (in 1/3 or 1/2 EV steps)
EXPOSURE COMPENSATION
EXPOSURE COMPENS.
-5/+5 EV  (in 1/3 or 1/2 EV steps)
Bulb,
 
30 sec → 1/4000 sec
SHUTTER SPEED Maximum and minimum possible exposure time in seconds.
Bulb, 
30 sec → 1/8000 sec
Sony Alpha a6700
Pentax K-3 III

X-SYNC:
1/160
No
built-in
flash

No
flash
BUILT-IN FLASH
No
built-in
flash

No
flash

X-SYNC:
1/200
Yes
HOT SHOE
Yes
USB 3.2 (5 Gbit/sec)
USB
USB 3.2 (20 Gbit/sec)
Microphone port, Headphone port, HDMI
CONNECTIONS
CONNECT.
Microphone port, Headphone port, HDMI
BUILT-IN
DEVICES
SD, SDHC, SDXC (UHS-I/II compatible)
STORAGE TYPES
SD, SDHC, SDXC (UHS-I/II compatible)
1
CARD SLOTS
2
550
shots
BATTERY LIFEMaximum number of images that can be shot per single battery charge (according to CIPA).
800
shots

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