Pentax K-3 III vs. OM System OM-1 - Camera Comparison

Comparison of the Pentax K-3 III and the OM System OM-1

Pentax K-3 III
85 points
OM System OM-1
89 points
Pentax K-3 III
Pentax K-3 III ✭ Camspex.com
104 mm
135 mm
BODY
OM System OM-1
OM System OM-1 ✭ Camspex.com
92 mm
139 mm
2021
YEARYear of announcement
2022
Magnesium alloy
BODY MATERIAL
Magnesium alloy
Weather
sealed
WEATHER SEALING
Weather
sealed
Pentax KAF2
LENS MOUNT
Micro Four Thirds
300 000 cycles
SHUTTER LIFEThe shutter durability as rated by the manufacturer.
400 000 cycles
820 g
1.81 lb
135 x 104 x 74 mm
5.3 x 4.1 x 2.9 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
139 x 92 x 73 mm
5.5 x 3.6 x 2.9 in.
599 g
1.32 lb
Pentax K-3 III
OM System OM-1
25.7 MP
Sony IMX571 Exmor RS 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.
20.4 MP
Stacked BSI Live MOS Four Thirds Sensor
25.7 MP
EFFECTIVE MEGAPIX The number of effective megapixels (MP).
20.4 MP
23.3 x 15.5 mm
SENSOR SIZE
17.4 x 13.0 mm
6192 x 4128 pixels
MAX. RESOLUTIONMaximum still image resolution
MAX. RESOLUT.Maximum still image resolution
5184 x 3888 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)
2x
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.
3.36 μm
None (with anti-aliasing simulator)
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
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.
4:3
Pentax K-3 III
DXOMARK
SENSOR
SCOREAnalysis of the camera image quality by dxomark.com
OM System OM-1
 
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
 
Pentax K-3 III
OM System OM-1
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:
0.82
Optical (pentaprism)
VF TYPE
Electronic (5 760 000 dot OLED)
Fixed
 1 620 000 dot LCD
REAR SCREEN
Articulated 
1 620 000 dot LCD
3.2 inch
SCREEN SIZE
3 inch
LIVE VIEW & TOUCH SCREEN
camspex.com — Top plate LCD — Pentax K-3 III
TOP LCD PANELLCD panel on top of the camera which provides information about the current camera settings.
No top LCD panel
Pentax K-3 III
OM System OM-1
Phase detection, Contrast detection in Live View mode
AUTOFOCUS SYSTEM
AF SYSTEM
Hybrid detection with Focus Stacking
SAFOX 13
AUTOFOCUS MODULE
AF MODULE
All Cross Quad Pixel AF
101
101
FOCUS POINTSAutofocus points
as shown in the figures below:

° linear sensors
° cross-type sensors
° dual cross-type sensors
contrast autofocus areas
1053 (phase)  
1053 (contrast)
1053
 (phase)  
1053
 (contrast)
25
CROSS-TYPE FOCUS POINTS
CROSS-TYPE FP
1053
camspex.com — Autofocus system — Pentax K-3 III
-4
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.
-8.0
camspex.com — Autofocus system — OM System OM-1
32 %
AF COVERAGEFrame coverage by AF sensors in percent.
100 %
Yes
IN-BODY
AF MOTORAn in-body AF motor gives the ability to auto-focus with older lenses which don't have their own motors.
None
5-axis sensor shift
IN-BODY IMAGE STABILIZATION
IMAGE STABILIZ.
5-axis sensor shift
Pentax K-3 III
OM System OM-1
PRIME V
IMAGE
PROCESSOR
TruePic X
14 bit RAW, DNG, JPEG
OUTPUT FORMATS
12 bit RAW, JPEG
Auto, 100 - 1600000
ISO SEN­SITIVITY
Auto, 80 - 25600
(can be extended to ISO 102400)
12
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.
10
fps
37 JPEG shots
32 RAW shots
MAX. BURSTMaximum number of shots in high-speed continuous drive mode until the buffer is full.
169 JPEG shots
139 RAW shots
2160p @ 30 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, 1/2 or 1 EV steps)
Bulb,
 
30 sec → 1/8000 sec
SHUTTER SPEED Maximum and minimum possible exposure time in seconds.
Bulb, 
60 sec → 1/8000 sec
Pentax K-3 III
OM System OM-1

X-SYNC:
1/200
No
built-in
flash

No
flash
BUILT-IN FLASH
No
built-in
flash

No
flash

X-SYNC:
1/250
Yes
HOT SHOE
Yes
USB 3.2 (20 Gbit/sec)
USB
USB 3.0 (5 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)
2
CARD SLOTS
2
800
shots
BATTERY LIFEMaximum number of images that can be shot per single battery charge (according to CIPA).
520
shots

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