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Olympus E-PM2 vs Pentax 645Z

Portability
89
Imaging
53
Features
63
Overall
57
Olympus PEN E-PM2 front
 
Pentax 645Z front
Portability
49
Imaging
81
Features
74
Overall
78

Olympus E-PM2 vs Pentax 645Z Key Specs

Olympus E-PM2
(Full Review)
  • 16MP - Four Thirds Sensor
  • 3" Fixed Display
  • ISO 200 - 25600
  • Sensor based Image Stabilization
  • 1920 x 1080 video
  • Micro Four Thirds Mount
  • 269g - 110 x 64 x 34mm
  • Introduced May 2013
  • Old Model is Olympus E-PM1
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
  • Announced April 2014
  • Replaced the Pentax 645D
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Olympus E-PM2 vs Pentax 645Z Overview

Lets look more closely at the Olympus E-PM2 and Pentax 645Z, one being a Entry-Level Mirrorless and the other is a Pro DSLR by companies Olympus and Pentax. There is a significant difference between the resolutions of the E-PM2 (16MP) and 645Z (51MP) and the E-PM2 (Four Thirds) and 645Z (Medium format) boast totally different sensor sizes.

Photography Glossary

The E-PM2 was announced 10 months before the 645Z and they are both of a similar generation. The two cameras feature different body design with the Olympus E-PM2 being a Rangefinder-style mirrorless camera and the Pentax 645Z being a Large SLR camera.

Before we go straight to a in-depth comparison, here is a brief highlight of how the E-PM2 scores against the 645Z when considering portability, imaging, features and an overall grade.

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Reasons to pick Olympus E-PM2 over the Pentax 645Z

 E-PM2 645Z 
Touch display Easily navigate

Reasons to pick Pentax 645Z over the Olympus E-PM2

 645Z E-PM2 
AnnouncedApril 2014May 2013More recent by 10 months
Display typeTiltingFixed Tilting display
Display size3.2"3"Larger display (+0.2")
Display resolution1037k460kClearer display (+577k dot)

Common features in the Olympus E-PM2 and Pentax 645Z

 E-PM2 645Z 
Manually focus Very exact focus
Selfie screen Neither provides selfie screen

Olympus E-PM2 vs Pentax 645Z Physical Comparison

For anyone who is looking to lug around your camera regularly, you will have to consider its weight and size. The Olympus E-PM2 provides exterior measurements of 110mm x 64mm x 34mm (4.3" x 2.5" x 1.3") accompanied by a weight of 269 grams (0.59 lbs) whilst the Pentax 645Z has specifications of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") and a weight of 1550 grams (3.42 lbs).

Check the Olympus E-PM2 and Pentax 645Z in the latest Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into account, the weight of an Interchangeable Lens Camera will differ depending on the lens you have at the time. The following is a front view measurements comparison of the E-PM2 against the 645Z.

Olympus E-PM2 vs Pentax 645Z size comparison

Looking at size and weight, the portability rating of the E-PM2 and 645Z is 89 and 49 respectively.

Olympus E-PM2 vs Pentax 645Z top view buttons comparison

Olympus E-PM2 vs Pentax 645Z Sensor Comparison

Oftentimes, it is very tough to see the gap between sensor measurements only by reviewing specifications. The graphic underneath should provide you a clearer sense of the sensor sizing in the E-PM2 and 645Z.

To sum up, both of the cameras feature different megapixel count and different sensor measurements. The E-PM2 with its tinier sensor will make getting shallower depth of field trickier and the Pentax 645Z will offer more detail with its extra 35 Megapixels. Greater resolution will allow you to crop pics way more aggressively. The older E-PM2 is going to be behind with regard to sensor innovation.

Olympus E-PM2 vs Pentax 645Z sensor size comparison

Olympus E-PM2 vs Pentax 645Z Screen and ViewFinder

Olympus E-PM2 vs Pentax 645Z Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus E-PM2 Portrait photography information
Pentax 645Z Portrait photography information
71
has manual focus
sensor resolution is decent (16MP)
sensor size is nice (Four Thirds)
includes face detect focusing
supports RAW files
88
you can focus manually
megapixel count great (51 megapixels)
sensor size is large (Medium format)
features face detect autofocus
saves RAW files
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Street Comparison

Olympus E-PM2 Street photography factors
Pentax 645Z Street photography factors
79
image stabilization (Sensor based)
sensor size is nice (Four Thirds)
supports RAW files
has focus by touch
great ISO range (25,600)
no moving screen
63
screen tilts
sensor size is large (Medium format)
saves RAW files
weather sealing
above average ISO range (204,800)
no image stabilization
heavier than competition (1,550 grams)
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Sports Comparison

Olympus E-PM2 as a Sports photography camera
Pentax 645Z as a Sports photography camera
66
image stabilization (Sensor based)
sensor resolution is decent (16MP)
sensor size is nice (Four Thirds)
includes tracking focus
has no phase detect AF
71
megapixel count great (51MP)
sensor size is large (Medium format)
features tracking focus
weather sealing
sensor has phase detect autofocus
slow continuous shooting (3.0 fps)
no image stabilization
low battery (650 shots)
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Travel Comparison

Olympus E-PM2 Travel photography factors
Pentax 645Z Travel photography factors
66
has focus by touch
sensor resolution is decent (16 megapixels)
no Timelapse recording
does not have a selfie friendly screen
51
weather sealing
megapixel count great (51 megapixels)
low battery (650 CIPA)
heavier than competition (1,550 grams)
doesn't posses selfie friendly display
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Landscape Comparison

Olympus E-PM2 as a Landscape photography camera
Pentax 645Z as a Landscape photography camera
74
has manual focus
swap lenses (Micro Four Thirds mount)
decent sized screen (3 inch)
image stabilization (Sensor based)
sensor resolution is decent (16MP)
sensor size is nice (Four Thirds)
great ISO range (25,600)
supports RAW files
no Timelapse recording
78
you can focus manually
switch lenses (Pentax 645AF2 mount)
good sized screen (3.2 inches)
megapixel count great (51 megapixels)
sensor size is large (Medium format)
no anti aliasing filter
above average ISO range (204,800)
saves RAW files
weather sealing
two card slots
no image stabilization
low battery (650 shots)
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Vlogging Comparison

Olympus E-PM2 Vlogging details
Pentax 645Z Vlogging details
36
touchscreen enabled
image stabilization (Sensor based)
includes face detect focusing
video resolution high (1920 x 1080 pxls)
does not have a selfie friendly screen
no microphone support
27
features face detect autofocus
video res high (1920 x 1080 resolution)
includes mic socket
doesn't posses selfie friendly display
no image stabilization
heavier than competition (1,550 grams)
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Olympus E-PM2 vs Pentax 645Z Specifications

Detailed spec comparison table for Olympus E-PM2 and Pentax 645Z
 Olympus PEN E-PM2Pentax 645Z
General Information
Manufacturer Olympus Pentax
Model Olympus PEN E-PM2 Pentax 645Z
Type Entry-Level Mirrorless Pro DSLR
Introduced 2013-05-21 2014-04-15
Physical type Rangefinder-style mirrorless Large SLR
Sensor Information
Processor Chip - 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 16MP 51MP
Anti aliasing filter
Aspect ratio 4:3 4:3
Full resolution 4608 x 3456 8256 x 6192
Max native ISO 25600 204800
Min native ISO 200 100
RAW files
Autofocusing
Manual focus
Touch focus
Autofocus continuous
Single autofocus
Tracking autofocus
Autofocus selectice
Autofocus center weighted
Multi area autofocus
Live view autofocus
Face detect autofocus
Contract detect autofocus
Phase detect autofocus
Number of focus points 35 27
Lens
Lens mounting type Micro Four Thirds Pentax 645AF2
Total lenses 107 6
Crop factor 2.1 0.8
Screen
Display type Fixed Type Tilting
Display sizing 3 inches 3.2 inches
Display resolution 460 thousand dots 1,037 thousand dots
Selfie friendly
Liveview
Touch capability
Viewfinder Information
Viewfinder Electronic (optional) Optical (pentaprism)
Viewfinder coverage - 98%
Viewfinder magnification - 0.85x
Features
Slowest shutter speed 60 seconds 30 seconds
Maximum shutter speed 1/4000 seconds 1/4000 seconds
Continuous shooting rate 8.0 frames/s 3.0 frames/s
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Change white balance
Image stabilization
Inbuilt flash
Flash range 7.00 m (bundled FL-LM1) no built-in flash
Flash options Auto, On, Off, Red-Eye, Fill-in, Slow Sync, Manual (3 levels) 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
Hot shoe
Auto exposure bracketing
WB bracketing
Maximum flash synchronize 1/250 seconds 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 (30 fps), 1280 x 720 (30 fps), 640 x 480 (30 fps) 1920 x 1080 (60i, 50i, 30p, 25p, 24p), 1280 x 720 (60p, 50p, 30p, 25p,24p)
Max video resolution 1920x1080 1920x1080
Video format MPEG-4, H.264, Motion JPEG MPEG-4, H.264
Mic port
Headphone port
Connectivity
Wireless Eye-Fi Connected None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 3.0 (5 GBit/sec)
GPS None Optional
Physical
Environment sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 269 gr (0.59 pounds) 1550 gr (3.42 pounds)
Physical dimensions 110 x 64 x 34mm (4.3" x 2.5" x 1.3") 156 x 117 x 123mm (6.1" x 4.6" x 4.8")
DXO scores
DXO All around score 72 101
DXO Color Depth score 22.7 26.0
DXO Dynamic range score 12.2 14.7
DXO Low light score 932 4505
Other
Battery life 360 shots 650 shots
Battery type Battery Pack Battery Pack
Battery model BLS-5 D-LI90
Self timer Yes (2 or 12 sec) Yes (2 or 10 secs)
Time lapse recording
Type of storage SD/SDHC/SDXC Dual SD/SDHC/SDXC slots
Card slots One Two
Retail price $448 $5,024