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Olympus E-M1 III vs Pentax K-7

Portability
67
Imaging
62
Features
96
Overall
75
Olympus OM-D E-M1 Mark III front
 
Pentax K-7 front
Portability
60
Imaging
55
Features
69
Overall
60

Olympus E-M1 III vs Pentax K-7 Key Specs

Olympus E-M1 III
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3" Fully Articulated Display
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • No Anti-Alias Filter
  • 1/8000s Max Shutter
  • 4096 x 2160 video
  • Micro Four Thirds Mount
  • 580g - 134 x 91 x 69mm
  • Introduced February 2020
  • Previous Model is Olympus E-M1 II
Pentax K-7
(Full Review)
  • 15MP - APS-C Sensor
  • 3" Fixed Screen
  • ISO 100 - 2000 (Boost to 6400)
  • Sensor based Image Stabilization
  • 1/8000s Maximum Shutter
  • 1280 x 720 video
  • Pentax KAF2 Mount
  • 750g - 131 x 97 x 73mm
  • Launched October 2009
  • Replacement is Pentax K-5
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Olympus E-M1 III vs Pentax K-7 Overview

Below is a in depth overview of the Olympus E-M1 III versus Pentax K-7, former being a Pro Mirrorless while the latter is a Advanced DSLR by competitors Olympus and Pentax. There is a noticeable difference between the resolutions of the E-M1 III (20MP) and K-7 (15MP) and the E-M1 III (Four Thirds) and K-7 (APS-C) come with totally different sensor size.

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The E-M1 III was unveiled 10 years later than the K-7 and that is quite a sizable difference as far as tech is concerned. Both of the cameras offer different body type with the Olympus E-M1 III being a SLR-style mirrorless camera and the Pentax K-7 being a Mid-size SLR camera.

Before delving through a full comparison, below is a brief view of how the E-M1 III grades versus the K-7 when considering portability, imaging, features and an overall grade.

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Reasons to pick Olympus E-M1 III over the Pentax K-7

 E-M1 III K-7 
LaunchedFebruary 2020October 2009More recent by 127 months
Screen typeFully ArticulatedFixed Fully Articulating screen
Screen resolution1037k921kSharper screen (+116k dot)
Selfie screen Easy selfies
Touch friendly screen Quickly navigate

Reasons to pick Pentax K-7 over the Olympus E-M1 III

 K-7 E-M1 III 

Common features in the Olympus E-M1 III and Pentax K-7

 E-M1 III K-7 
Focus manually More exact focus
Screen sizing3"3"Equivalent screen size

Olympus E-M1 III vs Pentax K-7 Physical Comparison

If you are planning to lug around your camera frequently, you will want to factor in its weight and proportions. The Olympus E-M1 III has got exterior measurements of 134mm x 91mm x 69mm (5.3" x 3.6" x 2.7") having a weight of 580 grams (1.28 lbs) and the Pentax K-7 has measurements of 131mm x 97mm x 73mm (5.2" x 3.8" x 2.9") along with a weight of 750 grams (1.65 lbs).

Check out the Olympus E-M1 III versus Pentax K-7 in our brand new Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Don't forget, the weight of an ILC will differ dependant on the lens you choose at that moment. Here is the front view over all size comparison of the E-M1 III vs the K-7.

Olympus E-M1 III vs Pentax K-7 size comparison

Taking into consideration size and weight, the portability rating of the E-M1 III and K-7 is 67 and 60 respectively.

Olympus E-M1 III vs Pentax K-7 top view buttons comparison

Olympus E-M1 III vs Pentax K-7 Sensor Comparison

In many cases, it is very tough to envision the gap between sensor measurements merely by reviewing a spec sheet. The visual here may provide you a much better sense of the sensor measurements in the E-M1 III and K-7.

As you can see, both the cameras enjoy different megapixel count and different sensor measurements. The E-M1 III having a tinier sensor will make getting bokeh more challenging and the Olympus E-M1 III will offer extra detail having an extra 5MP. Higher resolution will also let you crop pictures far more aggressively. The fresher E-M1 III will have a benefit when it comes to sensor technology.

Olympus E-M1 III vs Pentax K-7 sensor size comparison

Olympus E-M1 III vs Pentax K-7 Screen and ViewFinder

Olympus E-M1 III vs Pentax K-7 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M1 III Portrait photography highlights
Pentax K-7 Portrait photography highlights
77
manual focus
megapixel count good (20 megapixels)
decent sensor size (Four Thirds)
features face detection autofocus
saves RAW formats
73
you can focus manually
good megapixels (15 megapixels)
good sensor size (APS-C)
features face detect focus
exports RAW files
Photography Glossary

Street Comparison

Street photography with Olympus E-M1 III
Street photography with Pentax K-7
78
screen articulates
built in image stabilization (Sensor based 5-axis)
decent sensor size (Four Thirds)
saves RAW formats
provides touch to focus
weather proofing
above average ISO range (25,600)
66
image stabilization (Sensor based)
good sensor size (APS-C)
exports RAW files
weather proofing
screen is fixed
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Sports Comparison

Olympus E-M1 III Sports photography information
Pentax K-7 Sports photography information
81
high shutter speed (1/8,000s)
quiet shooting (1/32,000s)
high fps (60.0 frames/s)
built in image stabilization (Sensor based 5-axis)
megapixel count good (20 megapixels)
decent sensor size (Four Thirds)
features tracking autofocus
weather proofing
comes with phase detect autofocus
70
maximum shutter speed is high (1/8,000 seconds)
image stabilization (Sensor based)
good megapixels (15 megapixels)
good sensor size (APS-C)
weather proofing
supports phase detect auto focus
slow continuous shooting (5.0 fps)
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Travel Comparison

Travel photography with Olympus E-M1 III
Travel photography with Pentax K-7
79
weather proofing
has bluetooth
provides touch to focus
megapixel count good (20 megapixels)
selfie friendly display
65
weather proofing
good megapixels (15MP)
flash built-in
display isn't selfie friendly
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Landscape Comparison

Olympus E-M1 III Landscape photography highlights
Pentax K-7 Landscape photography highlights
81
manual focus
interchangeable lenses (Micro Four Thirds mount)
good sized screen (3")
built in image stabilization (Sensor based 5-axis)
megapixel count good (20MP)
decent sensor size (Four Thirds)
no anti-alias filter
above average ISO range (25,600)
saves RAW formats
weather proofing
two card slots
78
you can focus manually
interchangeable lenses (Pentax KAF2 mount)
screen is a good size (3 inches)
image stabilization (Sensor based)
good megapixels (15MP)
good sensor size (APS-C)
exports RAW files
weather proofing
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Vlogging Comparison

Olympus E-M1 III Vlogging information
Pentax K-7 Vlogging information
79
selfie friendly display
has touchscreen
built in image stabilization (Sensor based 5-axis)
features face detection autofocus
video resolution high (4096 x 2160 resolution)
does have external microphone socket
25
image stabilization (Sensor based)
features face detect focus
display isn't selfie friendly
video resolution low (1280 x 720 pixels)
lack of mic jack
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Olympus E-M1 III vs Pentax K-7 Specifications

Detailed spec comparison table for Olympus E-M1 III and Pentax K-7
 Olympus OM-D E-M1 Mark IIIPentax K-7
General Information
Make Olympus Pentax
Model Olympus OM-D E-M1 Mark III Pentax K-7
Type Pro Mirrorless Advanced DSLR
Introduced 2020-02-11 2009-10-02
Body design SLR-style mirrorless Mid-size SLR
Sensor Information
Processor TruePic IX Prime II
Sensor type CMOS CMOS
Sensor size Four Thirds APS-C
Sensor dimensions 17.4 x 13mm 23.4 x 15.6mm
Sensor surface area 226.2mm² 365.0mm²
Sensor resolution 20 megapixels 15 megapixels
Anti aliasing filter
Aspect ratio 4:3 3:2
Full resolution 5184 x 3888 4672 x 3104
Max native ISO 25600 2000
Max boosted ISO - 6400
Min native ISO 200 100
RAW support
Min boosted ISO 64 -
Autofocusing
Focus manually
AF touch
Continuous AF
Single AF
Tracking AF
AF selectice
AF center weighted
AF multi area
Live view AF
Face detect focusing
Contract detect focusing
Phase detect focusing
Number of focus points 121 11
Cross focus points 121 -
Lens
Lens mount Micro Four Thirds Pentax KAF2
Available lenses 107 151
Crop factor 2.1 1.5
Screen
Range of display Fully Articulated Fixed Type
Display size 3" 3"
Resolution of display 1,037k dot 921k dot
Selfie friendly
Liveview
Touch display
Display technology - TFT color LCD with AR coating
Viewfinder Information
Viewfinder type Electronic Optical (pentaprism)
Viewfinder resolution 2,360k dot -
Viewfinder coverage 100 percent 100 percent
Viewfinder magnification 0.74x 0.61x
Features
Lowest shutter speed 60 seconds 30 seconds
Highest shutter speed 1/8000 seconds 1/8000 seconds
Highest quiet shutter speed 1/32000 seconds -
Continuous shooting speed 60.0fps 5.0fps
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Change WB
Image stabilization
Built-in flash
Flash range no built-in flash 13.00 m
Flash settings Redeye, Fill-in, Flash Off, Red-eye Slow sync.(1st curtain), Slow sync.(1st curtain), Slow sync.(2nd curtain), Manual Auto, On, Off, Red-eye, Slow Sync, Rear Curtain, Wireless
Hot shoe
AEB
White balance bracketing
Highest flash sync 1/250 seconds 1/180 seconds
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions 4096 x 2160 @ 24p / 237 Mbps, MOV, H.264, Linear PCM3840 x 2160 @ 30p / 102 Mbps, MOV, H.264, Linear PCM3840 x 2160 @ 25p / 102 Mbps, MOV, H.264, Linear PCM3840 x 2160 @ 23.98p / 102 Mbps, MOV, H.264, Linear PCM1920 x 1080 @ 60p, MOV, H.264, Linear PCM1920 x 1080 @ 50p, MOV, H.264, Linear PCM1920 x 1080 @ 30p, MOV, H.264, Linear PCM1920 x 1080 @ 25p, MOV, H.264, Linear PCM1920 x 1080 @ 23.98p, MOV, H.264, Linear PCM 1280 x 720 (30 fps), 1536 x 1024 (30 fps), 640 x 480 (30 fps), 320 x 240 (30 fps)
Max video resolution 4096x2160 1280x720
Video format MPEG-4, H.264 Motion JPEG
Mic input
Headphone input
Connectivity
Wireless Built-In None
Bluetooth
NFC
HDMI
USB USB 3.1 Gen 1 (5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environment seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 580 gr (1.28 pounds) 750 gr (1.65 pounds)
Dimensions 134 x 91 x 69mm (5.3" x 3.6" x 2.7") 131 x 97 x 73mm (5.2" x 3.8" x 2.9")
DXO scores
DXO All around score not tested 61
DXO Color Depth score not tested 22.6
DXO Dynamic range score not tested 10.6
DXO Low light score not tested 536
Other
Battery life 420 photographs 980 photographs
Battery format Battery Pack Battery Pack
Battery model BLH-1 D-LI90
Self timer Yes (2 or 12 secs, custom) Yes (2 or 10 sec)
Time lapse feature
Type of storage Dual SD/SDHC/SDXC slots (UHS-II on first slot) SD/SDHC/MMC
Storage slots Dual One
Pricing at launch $1,800 $599