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Olympus E-M10 vs Pentax 645Z

Portability
82
Imaging
53
Features
73
Overall
61
Olympus OM-D E-M10 front
 
Pentax 645Z front
Portability
49
Imaging
80
Features
74
Overall
77

Olympus E-M10 vs Pentax 645Z Key Specs

Olympus E-M10
(Full Review)
  • 16MP - Four Thirds Sensor
  • 3" Tilting Display
  • ISO 200 - 25600
  • Sensor based Image Stabilization
  • 1920 x 1080 video
  • Micro Four Thirds Mount
  • 396g - 119 x 82 x 46mm
  • Introduced March 2014
  • New Model is Olympus E-M10 II
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
  • Introduced April 2014
  • Older Model is Pentax 645D
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Olympus E-M10 vs Pentax 645Z Overview

Here is a in depth analysis of the Olympus E-M10 versus Pentax 645Z, former being a Entry-Level Mirrorless while the other is a Pro DSLR by manufacturers Olympus and Pentax. There is a noticeable difference between the resolutions of the E-M10 (16MP) and 645Z (51MP) and the E-M10 (Four Thirds) and 645Z (Medium format) have totally different sensor dimensions.

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The E-M10 was announced within a month of the 645Z which means that they are both of a similar age. Each of these cameras have different body design with the Olympus E-M10 being a SLR-style mirrorless camera and the Pentax 645Z being a Large SLR camera.

Before we go straight to a full comparison, here is a brief introduction of how the E-M10 grades against the 645Z with regards to portability, imaging, features and an overall rating.

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

 E-M10 645Z 
Touch display Easily navigate

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

 645Z E-M10 
Display dimensions3.2"3"Larger display (+0.2")

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

 E-M10 645Z 
IntroducedMarch 2014April 2014Similar age
Focus manually Very precise focus
Display typeTiltingTiltingTilting display
Display resolution1037k1037kIdentical display resolution
Selfie screen Neither features selfie screen

Olympus E-M10 vs Pentax 645Z Physical Comparison

For anyone who is intending to carry your camera, you need to consider its weight and dimensions. The Olympus E-M10 enjoys exterior dimensions of 119mm x 82mm x 46mm (4.7" x 3.2" x 1.8") having a weight of 396 grams (0.87 lbs) and the Pentax 645Z has dimensions of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") and a weight of 1550 grams (3.42 lbs).

Examine the Olympus E-M10 versus Pentax 645Z in our completely new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Remember that, the weight of an ILC will differ based on the lens you use during that time. Underneath is a front view dimension comparison of the E-M10 and the 645Z.

Olympus E-M10 vs Pentax 645Z size comparison

Using size and weight, the portability grade of the E-M10 and 645Z is 82 and 49 respectively.

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

Olympus E-M10 vs Pentax 645Z Sensor Comparison

Often, it is very difficult to see the gap between sensor sizing only by checking technical specs. The photograph below might offer you a far better sense of the sensor sizes in the E-M10 and 645Z.

As you have seen, the two cameras provide different megapixel count and different sensor sizing. The E-M10 having a tinier sensor will make getting shallower depth of field tougher and the Pentax 645Z will give you extra detail with its extra 35 Megapixels. Greater resolution can also help you crop images more aggressively.

Olympus E-M10 vs Pentax 645Z sensor size comparison

Olympus E-M10 vs Pentax 645Z Screen and ViewFinder

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

Portrait Comparison

Olympus E-M10 as a Portrait photography camera
Pentax 645Z as a Portrait photography camera
71
has manual focus
sensor resolution is decent (16MP)
sensor size is nice (Four Thirds)
supports face detection focus
saves RAW formats
88
focusing manually
MP count fantastic (51MP)
sensor size is large (Medium format)
provides face detect focus
exports RAW formats
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Street Comparison

Olympus E-M10 as a Street photography camera
Pentax 645Z as a Street photography camera
77
screen tilts up and down
image stabilization (Sensor based)
sensor size is nice (Four Thirds)
saves RAW formats
comes with touch to focus
above average high ISO (25,600)
heavier than competition (396 grams)
63
screen tilts up and down
sensor size is large (Medium format)
exports RAW formats
environment proofing
above average ISO range (204,800)
does not have image stabilization
heavier than competition in class (1,550g)
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Sports Comparison

Olympus E-M10 as a Sports photography camera
Pentax 645Z as a Sports photography camera
66
image stabilization (Sensor based)
sensor resolution is decent (16 megapixels)
sensor size is nice (Four Thirds)
supports tracking autofocus
lacks phase detect auto focus
71
MP count fantastic (51 megapixels)
sensor size is large (Medium format)
provides tracking focus
environment proofing
comes with phase detect auto focus
max fps low (3.0 fps)
does not have image stabilization
low battery power (650 shots)
Photography Glossary

Travel Comparison

Olympus E-M10 Travel photography information
Pentax 645Z Travel photography information
67
comes with touch to focus
sensor resolution is decent (16 megapixels)
built-in flash
heavier than competition (396 grams)
screen is not selfie friendly
51
environment proofing
MP count fantastic (51 megapixels)
low battery power (650 per charge)
heavier than competition in class (1,550 grams)
display is not selfie friendly
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Landscape Comparison

Olympus E-M10 as a Landscape photography camera
Pentax 645Z as a Landscape photography camera
79
has manual focus
change lenses (Micro Four Thirds mount)
nice screen size (3")
image stabilization (Sensor based)
sensor resolution is decent (16MP)
sensor size is nice (Four Thirds)
above average high ISO (25,600)
saves RAW formats
78
focusing manually
switch lenses (Pentax 645AF2 mount)
good sized screen (3.2 inches)
MP count fantastic (51 megapixels)
sensor size is large (Medium format)
no low pass filter
above average ISO range (204,800)
exports RAW formats
environment proofing
two card slots
does not have image stabilization
low battery power (650 per charge)
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Vlogging Comparison

Olympus E-M10 Vlogging highlights
Pentax 645Z Vlogging highlights
33
screen is touchscreen
image stabilization (Sensor based)
supports face detection focus
high quality video (1920 x 1080 pixels)
screen is not selfie friendly
no external mic socket
heavier than competition (396 grams)
27
provides face detect focus
high video quality (1920 x 1080 pxls)
does have mic socket
display is not selfie friendly
does not have image stabilization
heavier than competition in class (1,550 grams)
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Olympus E-M10 vs Pentax 645Z Specifications

Detailed spec comparison table for Olympus E-M10 and Pentax 645Z
 Olympus OM-D E-M10Pentax 645Z
General Information
Brand Name Olympus Pentax
Model type Olympus OM-D E-M10 Pentax 645Z
Class Entry-Level Mirrorless Pro DSLR
Introduced 2014-03-18 2014-04-15
Physical type SLR-style mirrorless Large SLR
Sensor Information
Processor Chip TruePic VII PRIME III
Sensor type CMOS CMOS
Sensor size Four Thirds Medium format
Sensor dimensions 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
Maximum resolution 4608 x 3456 8256 x 6192
Maximum native ISO 25600 204800
Minimum native ISO 200 100
RAW data
Autofocusing
Manual focusing
Touch to focus
AF continuous
Single AF
AF tracking
Selective AF
AF center weighted
Multi area AF
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
Total lenses 107 6
Focal length multiplier 2.1 0.8
Screen
Type of display Tilting Tilting
Display diagonal 3 inches 3.2 inches
Resolution of display 1,037 thousand dots 1,037 thousand dots
Selfie friendly
Liveview
Touch display
Display technology TFT LCD -
Viewfinder Information
Viewfinder type Electronic Optical (pentaprism)
Viewfinder resolution 1,440 thousand dots -
Viewfinder coverage 100% 98%
Viewfinder magnification 0.58x 0.85x
Features
Lowest shutter speed 60s 30s
Highest shutter speed 1/4000s 1/4000s
Continuous shooting rate 8.0 frames/s 3.0 frames/s
Shutter priority
Aperture priority
Manual mode
Exposure compensation Yes Yes
Custom WB
Image stabilization
Built-in flash
Flash distance 5.80 m (ISO100) no built-in flash
Flash settings Flash Auto, Redeye, Fill-in, Flash Off, Red-eye Slow sync.(1st curtain), Slow sync.(1st curtain), Slow sync.(2nd curtain), Manual(1/1(FULL)~1/64) 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
Auto exposure bracketing
WB bracketing
Highest flash synchronize 1/250s 1/125s
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Supported video resolutions 1920 x 1080 (30p), 1280 x 720 (30p), 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
Mic port
Headphone port
Connectivity
Wireless Built-In None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 3.0 (5 GBit/sec)
GPS Optional Optional
Physical
Environmental sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 396 gr (0.87 pounds) 1550 gr (3.42 pounds)
Physical dimensions 119 x 82 x 46mm (4.7" x 3.2" x 1.8") 156 x 117 x 123mm (6.1" x 4.6" x 4.8")
DXO scores
DXO All around rating 72 101
DXO Color Depth rating 22.8 26.0
DXO Dynamic range rating 12.3 14.7
DXO Low light rating 884 4505
Other
Battery life 320 photos 650 photos
Form of battery Battery Pack Battery Pack
Battery ID BLS-5 D-LI90
Self timer Yes (12 sec., 2 sec.,custom (Waiting time 1-30sec.,Shooting interval 0.5/1/2/3sec.,Number of shots 1-10)) Yes (2 or 10 secs)
Time lapse recording
Storage type SD/SDHC/SDXC Dual SD/SDHC/SDXC slots
Card slots One 2
Retail cost $600 $5,024