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Olympus E-M10 II vs Pentax 645Z

Portability
82
Imaging
54
Features
77
Overall
63
Olympus OM-D E-M10 II front
 
Pentax 645Z front
Portability
49
Imaging
80
Features
74
Overall
77

Olympus E-M10 II vs Pentax 645Z Key Specs

Olympus E-M10 II
(Full Review)
  • 16MP - Four Thirds Sensor
  • 3" Tilting Display
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 1920 x 1080 video
  • Micro Four Thirds Mount
  • 390g - 120 x 83 x 47mm
  • Introduced August 2015
  • Superseded the Olympus E-M10
  • Updated by Olympus E-M10 III
Pentax 645Z
(Full Review)
  • 51MP - Medium format Sensor
  • 3.2" Tilting Display
  • ISO 100 - 204800
  • No Anti-Alias Filter
  • 1920 x 1080 video
  • Pentax 645AF2 Mount
  • 1550g - 156 x 117 x 123mm
  • Revealed April 2014
  • Old Model is Pentax 645D
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Olympus E-M10 II vs Pentax 645Z Overview

Here, we are reviewing the Olympus E-M10 II vs Pentax 645Z, one is a Entry-Level Mirrorless and the other is a Pro DSLR by companies Olympus and Pentax. There is a big difference between the sensor resolutions of the E-M10 II (16MP) and 645Z (51MP) and the E-M10 II (Four Thirds) and 645Z (Medium format) boast different sensor sizes.

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The E-M10 II was released 17 months after the 645Z making them a generation away from each other. Both of the cameras feature different body design with the Olympus E-M10 II being a SLR-style mirrorless camera and the Pentax 645Z being a Large SLR camera.

Before going straight to a complete comparison, here is a concise summation of how the E-M10 II grades against the 645Z in regards to portability, imaging, features and an overall score.

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Reasons to pick Olympus E-M10 II over the Pentax 645Z

 E-M10 II 645Z 
RevealedAugust 2015April 2014More modern by 17 months
Display resolution1040k1037kSharper display (+3k dot)
Touch friendly display Easily navigate

Reasons to pick Pentax 645Z over the Olympus E-M10 II

 645Z E-M10 II 
Display size3.2"3"Larger display (+0.2")

Common features in the Olympus E-M10 II and Pentax 645Z

 E-M10 II 645Z 
Focus manually Dial accurate focusing
Display typeTiltingTiltingTilting display
Selfie screen Lack of selfie screen

Olympus E-M10 II vs Pentax 645Z Physical Comparison

If you are planning to carry around your camera frequently, you will have to think about its weight and proportions. The Olympus E-M10 II provides physical dimensions of 120mm x 83mm x 47mm (4.7" x 3.3" x 1.9") and a weight of 390 grams (0.86 lbs) while the Pentax 645Z has measurements of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") along with a weight of 1550 grams (3.42 lbs).

Examine the Olympus E-M10 II vs Pentax 645Z in the new Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Bear in mind, the weight of an Interchangeable Lens Camera will differ depending on the lens you choose during that time. Following is a front view dimensions comparison of the E-M10 II vs the 645Z.

Olympus E-M10 II vs Pentax 645Z size comparison

Factoring in size and weight, the portability score of the E-M10 II and 645Z is 82 and 49 respectively.

Olympus E-M10 II vs Pentax 645Z top view buttons comparison

Olympus E-M10 II vs Pentax 645Z Sensor Comparison

Often, it can be tough to visualize the difference between sensor sizes simply by reading through a spec sheet. The image here might offer you a far better sense of the sensor dimensions in the E-M10 II and 645Z.

As you can see, both cameras feature different megapixels and different sensor sizes. The E-M10 II because of its tinier sensor is going to make shooting shallower DOF more difficult and the Pentax 645Z will resolve more detail as a result of its extra 35MP. Greater resolution will also make it easier to crop pics way more aggressively. The more recent E-M10 II provides an edge with regard to sensor tech.

Olympus E-M10 II vs Pentax 645Z sensor size comparison

Olympus E-M10 II vs Pentax 645Z Screen and ViewFinder

Olympus E-M10 II vs Pentax 645Z Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-M10 II Portrait photography features
Pentax 645Z Portrait photography features
72
focusing manually
MP count decent (16MP)
good sensor size (Four Thirds)
has face detection focus
saves RAW files
88
manual focus
megapixel count excellent (51MP)
large sensor size (Medium format)
has face detection autofocus
supports RAW formats
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Street Comparison

Olympus E-M10 II as a Street photography camera
Pentax 645Z as a Street photography camera
83
screen tilts
has image stabilization (Sensor based 5-axis)
good sensor size (Four Thirds)
saves RAW files
has focus via touch
great high ISO (25,600)
63
tilting screen
large sensor size (Medium format)
supports RAW formats
weather proof
good high ISO (204,800)
lack of image stabilization
more heavy than competitors in class (1,550g)
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Sports Comparison

Sports photography with Olympus E-M10 II
Sports photography with Pentax 645Z
67
has image stabilization (Sensor based 5-axis)
MP count decent (16 megapixels)
good sensor size (Four Thirds)
has tracking autofocus
lacks phase detect auto focus
71
megapixel count excellent (51MP)
large sensor size (Medium format)
has tracking autofocus
weather proof
has phase detect autofocus
painfully slow continuous shooting (3.0 fps)
lack of image stabilization
low battery pack (650 shots)
Photography Glossary

Travel Comparison

Travel photography with Olympus E-M10 II
Travel photography with Pentax 645Z
73
has focus via touch
MP count decent (16 megapixels)
has built in flash
doesn't offer selfie friendly screen
51
weather proof
megapixel count excellent (51MP)
low battery pack (650 per charge)
more heavy than competitors in class (1,550 grams)
does not contain selfie friendly display
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Landscape Comparison

Olympus E-M10 II Landscape photography highlights
Pentax 645Z Landscape photography highlights
79
focusing manually
change lenses (Micro Four Thirds mount)
screen size is good (3 inches)
has image stabilization (Sensor based 5-axis)
MP count decent (16 megapixels)
good sensor size (Four Thirds)
great high ISO (25,600)
saves RAW files
78
manual focus
switch lenses (Pentax 645AF2 mount)
pretty good screen size (3.2 inches)
megapixel count excellent (51 megapixels)
large sensor size (Medium format)
does not have anti-alias filter
good high ISO (204,800)
supports RAW formats
weather proof
has dual storage slots
lack of image stabilization
low battery pack (650 CIPA)
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Vlogging Comparison

Olympus E-M10 II as a Vlogging camera
Pentax 645Z as a Vlogging camera
35
built-in touchscreen
has image stabilization (Sensor based 5-axis)
has face detection focus
high quality video (1920 x 1080 pxls)
doesn't offer selfie friendly screen
missing external mic support
27
has face detection autofocus
video resolution high (1920 x 1080 pxls)
has external microphone jack
does not contain selfie friendly display
lack of image stabilization
more heavy than competitors in class (1,550 grams)
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Olympus E-M10 II vs Pentax 645Z Specifications

Detailed spec comparison table for Olympus E-M10 II and Pentax 645Z
 Olympus OM-D E-M10 IIPentax 645Z
General Information
Company Olympus Pentax
Model type Olympus OM-D E-M10 II Pentax 645Z
Class Entry-Level Mirrorless Pro DSLR
Introduced 2015-08-25 2014-04-15
Body design SLR-style mirrorless Large SLR
Sensor Information
Chip TruePic VII PRIME III
Sensor type CMOS CMOS
Sensor size Four Thirds Medium format
Sensor measurements 17.3 x 13mm 44 x 33mm
Sensor area 224.9mm² 1,452.0mm²
Sensor resolution 16 megapixel 51 megapixel
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 4:3
Highest Possible resolution 4608 x 3456 8256 x 6192
Maximum native ISO 25600 204800
Lowest native ISO 200 100
RAW files
Lowest enhanced ISO 100 -
Autofocusing
Focus manually
Touch to focus
Continuous AF
AF single
Tracking AF
Selective AF
Center weighted AF
AF multi area
AF live view
Face detect focusing
Contract detect focusing
Phase detect focusing
Total focus points 81 27
Lens
Lens mount type Micro Four Thirds Pentax 645AF2
Amount of lenses 107 6
Crop factor 2.1 0.8
Screen
Display type Tilting Tilting
Display sizing 3 inches 3.2 inches
Display resolution 1,040 thousand dot 1,037 thousand dot
Selfie friendly
Liveview
Touch capability
Viewfinder Information
Viewfinder type Electronic Optical (pentaprism)
Viewfinder resolution 2,360 thousand dot -
Viewfinder coverage 100% 98%
Viewfinder magnification 0.62x 0.85x
Features
Min shutter speed 60 seconds 30 seconds
Max shutter speed 1/4000 seconds 1/4000 seconds
Continuous shutter speed 8.0fps 3.0fps
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Change WB
Image stabilization
Inbuilt flash
Flash distance 5.80 m (ISO 100) no built-in flash
Flash options Auto, redeye reduction, fill flash, flash off, 1st-curtain slow sync w/redeye, 1st-curtain slow sync, 2nd-curtain slow sync, manual Flash On, Flash On+Red-eye Reduction, Slow-speed Sync, Slow-speed Sync+Red-eye, P-TTL, Trailing Curtain Sync, contrast-control-sync, high-speed sync, wireless sync
External flash
AEB
White balance bracketing
Max flash sync - 1/125 seconds
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions 1920 x 1080 (60p/30p/24p), 1280 x 720 (60p/30p/24p), 640 x 480 (30 fps) 1920 x 1080 (60i, 50i, 30p, 25p, 24p), 1280 x 720 (60p, 50p, 30p, 25p,24p)
Maximum video resolution 1920x1080 1920x1080
Video data format H.264, Motion JPEG MPEG-4, H.264
Microphone input
Headphone input
Connectivity
Wireless Built-In None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 3.0 (5 GBit/sec)
GPS None Optional
Physical
Environment seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 390 grams (0.86 lbs) 1550 grams (3.42 lbs)
Physical dimensions 120 x 83 x 47mm (4.7" x 3.3" x 1.9") 156 x 117 x 123mm (6.1" x 4.6" x 4.8")
DXO scores
DXO Overall rating 73 101
DXO Color Depth rating 23.1 26.0
DXO Dynamic range rating 12.5 14.7
DXO Low light rating 842 4505
Other
Battery life 320 photographs 650 photographs
Battery format Battery Pack Battery Pack
Battery ID BLS-50 D-LI90
Self timer Yes (12 sec., 2 sec, custom) Yes (2 or 10 secs)
Time lapse feature
Type of storage SD/SDHC/SDXC Dual SD/SDHC/SDXC slots
Storage slots Single Two
Price at release $499 $5,024