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Olympus E-M1X vs Pentax 645Z

Portability
54 Imaging
61 Features
93 Overall
73
Olympus OM-D E-M1X front
 
Pentax 645Z front
Portability
49 Imaging
80 Features
74 Overall
77

Olympus E-M1X vs Pentax 645Z Key Specs

Olympus E-M1X
(Full Review)
  • 20MP - Four Thirds Sensor
  • 3" Fully Articulated Display
  • ISO 200 - 25600
  • Sensor based 5-axis Image Stabilization
  • 1/8000s Maximum Shutter
  • 4096 x 2160 video
  • Micro Four Thirds Mount
  • 997g - 144 x 147 x 75mm
  • Announced January 2019
  • Earlier Model is Olympus E-M1 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
  • Revealed April 2014
  • Old Model is Pentax 645D
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Olympus E-M1X vs Pentax 645Z Overview

Following is a extended analysis of the Olympus E-M1X vs Pentax 645Z, one is a Pro Mirrorless and the other is a Pro DSLR by brands Olympus and Pentax. There is a crucial difference among the sensor resolutions of the E-M1X (20MP) and 645Z (51MP) and the E-M1X (Four Thirds) and 645Z (Medium format) possess totally different sensor measurements.

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The E-M1X was announced 4 years after the 645Z which is a fairly serious gap as far as camera tech is concerned. The two cameras offer different body type with the Olympus E-M1X being a SLR-style mirrorless camera and the Pentax 645Z being a Large SLR camera.

Before getting straight into a comprehensive comparison, below is a simple view of how the E-M1X matches up vs the 645Z in terms of portability, imaging, features and an overall score.

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Reasons to pick Olympus E-M1X over the Pentax 645Z

		

		

			
 E-M1X 645Z 
RevealedJanuary 2019April 2014More modern by 59 months
Display typeFully ArticulatedTiltingFully Articulating display
Selfie screen  Easy selfies
Touch display  Easily navigate
		

	

	
	

		

		
Reasons to pick Pentax 645Z over the Olympus E-M1X

		

		

			
 645Z E-M1X 
Display sizing3.2"3"Larger display (+0.2")
		

	

	
	

		

		
Common features in the Olympus E-M1X and Pentax 645Z

		

		

			
 E-M1X 645Z 
Manually focus  Dial exact focus
Display resolution1037k1037kThe same display resolution
		

	

	

	
	
	
	

	

		

		
Olympus E-M1X vs Pentax 645Z Physical Comparison

		

		

			
If you're intending to carry around your camera often, you'll need to think about its weight and dimensions. The Olympus E-M1X has got external dimensions of 144mm x 147mm x 75mm (5.7" x 5.8" x 3.0") and a weight of 997 grams (2.20 lbs) whilst the Pentax 645Z has dimensions of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") accompanied by a weight of 1550 grams (3.42 lbs).
See the Olympus E-M1X vs Pentax 645Z in the latest Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses
Bear in mind, the weight of an Interchangeable Lens Camera will change depending on the lens you have at that time. The following is the front view dimensions comparison of the E-M1X compared to the 645Z.
Olympus E-M1X vs Pentax 645Z size comparison
Factoring in size and weight, the portability score of the E-M1X and 645Z is 54 and 49 respectively.
Olympus E-M1X vs Pentax 645Z top view buttons comparison		

	

	
	

		

		
Olympus E-M1X vs Pentax 645Z Sensor Comparison

		

		

			
In many cases, it is very tough to visualise the contrast in sensor sizes purely by going through technical specs. The image below will offer you a greater sense of the sensor sizes in the E-M1X and 645Z.
As you can tell, both of these cameras offer different resolutions and different sensor sizes. The E-M1X having a smaller sensor will make getting shallow DOF tougher and the Pentax 645Z will show extra detail with its extra 31 Megapixels. Greater resolution can also help you crop photos a little more aggressively. The newer E-M1X will have an edge when it comes to sensor technology.
	
			Olympus E-M1X vs Pentax 645Z sensor size comparison			
		

	

	
	

		

		
Olympus E-M1X vs Pentax 645Z Screen and ViewFinder

		

		

					

		Olympus E-M1X vs Pentax 645Z Screen and Viewfinder comparison	

	
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Photography Type Scores

		

	

	
Portrait Comparison
Portrait photography with Olympus E-M1X
Portrait photography with Pentax 645Z
76
 manual focus
 megapixel count decent (20MP)
 sensor size is nice (Four Thirds)
 comes with face detection focus
 exports RAW files
88
 has manual focus
 amazing MP (51 megapixels)
 sensor size is great (Medium format)
 comes with face detect focusing
 exports RAW formats
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Street Comparison
 Olympus E-M1X as a Street photography camera
 Pentax 645Z as a Street photography camera
67
 screen can move to multiple angles
 built in image stabilization (Sensor based 5-axis)
 sensor size is nice (Four Thirds)
 exports RAW files
 offers touch to focus
 weather sealing
 good ISO range (25,600)
 heavier than others (997g)
63
 has a tilting screen
 sensor size is great (Medium format)
 exports RAW formats
 weather proof
 very good high ISO (204,800)
 lack of image stabilization
 heavier than average in class (1,550g)
Photography Glossary
Sports Comparison
 Olympus E-M1X as a Sports photography camera
 Pentax 645Z as a Sports photography camera
80
 great max shutter speed (1/8,000 seconds)
 silent shooting (1/32,000 seconds)
 fast shooting (60.0 fps)
 built in image stabilization (Sensor based 5-axis)
 megapixel count decent (20MP)
 sensor size is nice (Four Thirds)
 comes with tracking autofocus
 weather sealing
 better than average battery power (870 shots)
 sensor has phase detect auto focus
71
 amazing MP (51MP)
 sensor size is great (Medium format)
 comes with tracking focus
 weather proof
 has phase detect AF
 low fps (3.0 frames per second)
 lack of image stabilization
 bad battery power (650 shots)
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Travel Comparison
Travel photography with Olympus E-M1X
Travel photography with Pentax 645Z
68
 better than average battery power (870 CIPA)
 weather sealing
 has bluetooth
 offers touch to focus
 megapixel count decent (20 megapixels)
 screen is selfie friendly
 heavier than others (997 grams)
51
 weather proof
 amazing MP (51MP)
 bad battery power (650 per charge)
 heavier than average in class (1,550g)
 display is not selfie friendly
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Landscape Comparison
 Olympus E-M1X as a Landscape photography camera
 Pentax 645Z as a Landscape photography camera
79
 manual focus
 change lenses (Micro Four Thirds mount)
 decent sized screen (3 inches)
 built in image stabilization (Sensor based 5-axis)
 megapixel count decent (20 megapixels)
 sensor size is nice (Four Thirds)
 good ISO range (25,600)
 exports RAW files
 weather sealing
 better than average battery power (870 per charge)
 has dual storage slots
78
 has manual focus
 interchangeable lenses (Pentax 645AF2 mount)
 nice screen size (3.2")
 amazing MP (51 megapixels)
 sensor size is great (Medium format)
 no anti-alias filter
 very good high ISO (204,800)
 exports RAW formats
 weather proof
 has double storage slots
 lack of image stabilization
 bad battery power (650 shots)
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Vlogging Comparison
Olympus E-M1X Vlogging info
Pentax 645Z Vlogging info
68
 screen is selfie friendly
 touchscreen enabled
 built in image stabilization (Sensor based 5-axis)
 comes with face detection focus
 high quality video (4096 x 2160 pixels)
 includes external mic jack
 heavier than others (997 grams)
27
 comes with face detect focusing
 high res video (1920 x 1080 pixels)
 has mic port
 display is not selfie friendly
 lack of image stabilization
 heavier than average in class (1,550g)
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Olympus E-M1X vs Pentax 645Z Specifications

		

		

					

		
		

			Detailed spec comparison table for Olympus E-M1X and Pentax 645Z
 Olympus OM-D E-M1XPentax 645Z
General Information
Make Olympus Pentax
Model type Olympus OM-D E-M1X Pentax 645Z
Class Pro Mirrorless Pro DSLR
Announced 2019-01-24 2014-04-15
Body design SLR-style mirrorless Large SLR
Sensor Information
Processor Dual TruePic VIII PRIME III
Sensor type CMOS CMOS
Sensor size Four Thirds Medium format
Sensor dimensions 17.4 x 13mm 44 x 33mm
Sensor area 226.2mm² 1,452.0mm²
Sensor resolution 20 megapixels 51 megapixels
Anti alias filter    
Aspect ratio 4:3 4:3
Highest resolution 5184 x 3888 8256 x 6192
Highest native ISO 25600 204800
Min native ISO 200 100
RAW photos    
Min boosted ISO 64 -
Autofocusing
Manual focusing    
AF touch    
Continuous AF    
Single AF    
Tracking AF    
Selective AF    
Center weighted AF    
AF multi area    
AF live view    
Face detect AF    
Contract detect AF    
Phase detect AF    
Total focus points 121 27
Lens
Lens mount type Micro Four Thirds Pentax 645AF2
Available lenses 107 6
Crop factor 2.1 0.8
Screen
Display type Fully Articulated Tilting
Display size 3" 3.2"
Display resolution 1,037k dot 1,037k dot
Selfie friendly    
Liveview    
Touch capability    
Viewfinder Information
Viewfinder type Electronic Optical (pentaprism)
Viewfinder resolution 2,360k dot -
Viewfinder coverage 100 percent 98 percent
Viewfinder magnification 0.74x 0.85x
Features
Lowest shutter speed 60 seconds 30 seconds
Highest shutter speed 1/8000 seconds 1/4000 seconds
Highest quiet shutter speed 1/32000 seconds -
Continuous shooting speed 60.0 frames/s 3.0 frames/s
Shutter priority    
Aperture priority    
Expose Manually    
Exposure compensation Yes Yes
Custom WB    
Image stabilization    
Inbuilt flash    
Flash distance no built-in flash no built-in flash
Flash options Redeye, Fill-in, Flash Off, Red-eye Slow sync (1st curtain), Slow sync.(1st curtain), Slow sync (2nd curtain), 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
Hot shoe    
AEB    
White balance bracketing    
Highest flash sync - 1/125 seconds
Exposure
Multisegment exposure    
Average exposure    
Spot exposure    
Partial exposure    
AF area exposure    
Center weighted exposure    
Video features
Supported video resolutions 4096 x 2160 @ 24p / 237 Mbps, MOV, H.264, Linear PCM 1920 x 1080 (60i, 50i, 30p, 25p, 24p), 1280 x 720 (60p, 50p, 30p, 25p,24p)
Highest video resolution 4096x2160 1920x1080
Video data format MPEG-4, H.264 MPEG-4, H.264
Mic jack    
Headphone jack    
Connectivity
Wireless Built-In None
Bluetooth    
NFC    
HDMI    
USB Yes (USB-PD allows charging by laptop or external power bank) USB 3.0 (5 GBit/sec)
GPS Built-in Optional
Physical
Environment seal    
Water proofing    
Dust proofing    
Shock proofing    
Crush proofing    
Freeze proofing    
Weight 997 gr (2.20 pounds) 1550 gr (3.42 pounds)
Dimensions 144 x 147 x 75mm (5.7" x 5.8" x 3.0") 156 x 117 x 123mm (6.1" x 4.6" x 4.8")
DXO scores
DXO All around rating not tested 101
DXO Color Depth rating not tested 26.0
DXO Dynamic range rating not tested 14.7
DXO Low light rating not tested 4505
Other
Battery life 870 photos 650 photos
Battery form Built-in Battery Pack
Battery ID - D-LI90
Self timer Yes (2 or 12 secs, custom) Yes (2 or 10 secs)
Time lapse feature    
Storage media - Dual SD/SDHC/SDXC slots
Storage slots Two Two
Retail price $2,999 $5,024