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Pentax 645Z vs Sony RX10 III

Portability
49
Imaging
81
Features
74
Overall
78
Pentax 645Z front
 
Sony Cyber-shot DSC-RX10 III front
Portability
53
Imaging
53
Features
77
Overall
62

Pentax 645Z vs Sony RX10 III Key Specs

Pentax 645Z
(Full Review)
  • 51MP - Medium format Sensor
  • 3.2" Tilting Screen
  • ISO 100 - 204800
  • No Anti-Alias Filter
  • 1920 x 1080 video
  • Pentax 645AF2 Mount
  • 1550g - 156 x 117 x 123mm
  • Announced April 2014
  • Earlier Model is Pentax 645D
Sony RX10 III
(Full Review)
  • 20MP - 1" Sensor
  • 3" Tilting Screen
  • ISO 125 - 12800 (Increase to 25600)
  • Optical Image Stabilization
  • 3840 x 2160 video
  • 24-600mm (F2.4-4.0) lens
  • 1051g - 133 x 94 x 127mm
  • Introduced March 2016
  • Older Model is Sony RX10 II
  • Newer Model is Sony RX10 IV
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Pentax 645Z vs Sony RX10 III Overview

Here, we will be reviewing the Pentax 645Z vs Sony RX10 III, one being a Pro DSLR and the latter is a Large Sensor Superzoom by rivals Pentax and Sony. There exists a crucial gap between the resolutions of the 645Z (51MP) and RX10 III (20MP) and the 645Z (Medium format) and RX10 III (1") offer totally different sensor measurements.

Photography Glossary

The 645Z was manufactured 23 months earlier than the RX10 III which makes them a generation apart from one another. Both the cameras feature different body design with the Pentax 645Z being a Large SLR camera and the Sony RX10 III being a SLR-like (bridge) camera.

Before delving straight to a step-by-step comparison, here is a brief view of how the 645Z matches up against the RX10 III with regard to portability, imaging, features and an overall rating.

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Reasons to pick Pentax 645Z over the Sony RX10 III

 645Z RX10 III 
Screen size3.2"3"Bigger screen (+0.2")

Reasons to pick Sony RX10 III over the Pentax 645Z

 RX10 III 645Z 
IntroducedMarch 2016April 2014Fresher by 23 months
Screen resolution1229k1037kSharper screen (+192k dot)

Common features in the Pentax 645Z and Sony RX10 III

 645Z RX10 III 
Manual focus Dial exact focusing
Screen typeTiltingTiltingTilting screen
Selfie screen Lacking selfie screen
Touch screen Neither contains Touch screen

Pentax 645Z vs Sony RX10 III Physical Comparison

When you are intending to carry your camera often, you will need to think about its weight and volume. The Pentax 645Z has got external dimensions of 156mm x 117mm x 123mm (6.1" x 4.6" x 4.8") having a weight of 1550 grams (3.42 lbs) whilst the Sony RX10 III has sizing of 133mm x 94mm x 127mm (5.2" x 3.7" x 5.0") with a weight of 1051 grams (2.32 lbs).

Analyze the Pentax 645Z vs Sony RX10 III in the latest Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Do not forget, the weight of an Interchangeable Lens Camera will change depending on the lens you are working with at that moment. Following is a front view dimensions comparison of the 645Z vs the RX10 III.

Pentax 645Z vs Sony RX10 III size comparison

Looking at dimensions and weight, the portability score of the 645Z and RX10 III is 49 and 53 respectively.

Pentax 645Z vs Sony RX10 III top view buttons comparison

Pentax 645Z vs Sony RX10 III Sensor Comparison

More often than not, it can be difficult to see the contrast between sensor sizing only by reading through specifications. The visual here will help offer you a better sense of the sensor sizes in the 645Z and RX10 III.

Plainly, both cameras come with different resolutions and different sensor sizing. The 645Z due to its bigger sensor will make getting shallow depth of field less difficult and the Pentax 645Z will give you greater detail due to its extra 31 Megapixels. Higher resolution can also make it easier to crop shots a good deal more aggressively. The older 645Z is going to be disadvantaged with regard to sensor technology.

Pentax 645Z vs Sony RX10 III sensor size comparison

Pentax 645Z vs Sony RX10 III Screen and ViewFinder

Pentax 645Z vs Sony RX10 III Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax 645Z as a Portrait photography camera
Sony RX10 III as a Portrait photography camera
88
you can focus manually
excellent MP (51 megapixels)
large sensor size (Medium format)
provides face detect autofocus
supports RAW files
71
has manual focus
megapixel count decent (20MP)
sensor size is good (1")
has face detection focusing
supports RAW formats
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Street Comparison

Pentax 645Z Street photography features
Sony RX10 III Street photography features
63
screen tilts
large sensor size (Medium format)
supports RAW files
environment proof
great high ISO (204,800)
lack of image stabilization
more heavy than average (1,550g)
64
tilting screen
has image stabilization (Optical)
sensor size is good (1")
supports RAW formats
weather proof
more heavy than others (1,051g)
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Sports Comparison

Sports photography with Pentax 645Z
Sports photography with Sony RX10 III
71
excellent MP (51 megapixels)
large sensor size (Medium format)
provides tracking focus
environment proof
has phase detect autofocus
max fps low (3.0 frames/s)
lack of image stabilization
terrible battery pack (650 per charge)
70
incredible zoom range (24-600mm 25.0 x zoom)
silent shutter (1/32,000 seconds)
has image stabilization (Optical)
megapixel count decent (20MP)
sensor size is good (1")
has tracking autofocus
weather proof
better than average battery pack (420 per charge)
no phase detect AF
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Travel Comparison

Pentax 645Z Travel photography info
Sony RX10 III Travel photography info
51
environment proof
excellent MP (51MP)
terrible battery pack (650 CIPA)
more heavy than average (1,550g)
screen isn't selfie friendly
55
better than average battery pack (420 shots)
weather proof
megapixel count decent (20 megapixels)
flash built-in
really wide (24mm)
very long reach (600mm)
does not have Timelapse function
more heavy than others (1,051g)
screen is not selfie friendly
sluggish max aperture (f2.4)
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Landscape Comparison

Pentax 645Z Landscape photography advice
Sony RX10 III Landscape photography advice
78
you can focus manually
swap lenses (Pentax 645AF2 mount)
screen size is good (3.2 inch)
excellent MP (51MP)
large sensor size (Medium format)
doesnt have anti-alias filter
great high ISO (204,800)
supports RAW files
environment proof
2 card slots
lack of image stabilization
terrible battery pack (650 per charge)
64
has manual focus
really wide (24mm)
pretty good screen size (3 inches)
has image stabilization (Optical)
megapixel count decent (20 megapixels)
sensor size is good (1")
supports RAW formats
weather proof
better than average battery pack (420 CIPA)
can't switch lenses (fixed lens mount)
sluggish max aperture (f2.4)
does not have Timelapse function
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Vlogging Comparison

Pentax 645Z Vlogging features
Sony RX10 III Vlogging features
27
provides face detect autofocus
high quality video (1920 x 1080 pxls)
has microphone support
screen isn't selfie friendly
lack of image stabilization
more heavy than average (1,550 grams)
28
really wide (24mm)
has image stabilization (Optical)
has face detection focusing
high res video (3840 x 2160 pxls)
comes with external microphone socket
sluggish max aperture (f2.4)
screen is not selfie friendly
more heavy than others (1,051 grams)
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Pentax 645Z vs Sony RX10 III Specifications

Detailed spec comparison table for Pentax 645Z and Sony RX10 III
 Pentax 645ZSony Cyber-shot DSC-RX10 III
General Information
Make Pentax Sony
Model type Pentax 645Z Sony Cyber-shot DSC-RX10 III
Type Pro DSLR Large Sensor Superzoom
Announced 2014-04-15 2016-03-29
Physical type Large SLR SLR-like (bridge)
Sensor Information
Powered by PRIME III Bionz X
Sensor type CMOS BSI-CMOS
Sensor size Medium format 1"
Sensor measurements 44 x 33mm 13.2 x 8.8mm
Sensor area 1,452.0mm² 116.2mm²
Sensor resolution 51 megapixel 20 megapixel
Anti alias filter
Aspect ratio 4:3 1:1, 4:3, 3:2 and 16:9
Peak resolution 8256 x 6192 5472 x 3648
Highest native ISO 204800 12800
Highest enhanced ISO - 25600
Minimum native ISO 100 125
RAW support
Minimum enhanced ISO - 64
Autofocusing
Manual focusing
Touch focus
Autofocus continuous
Autofocus single
Tracking autofocus
Autofocus selectice
Center weighted autofocus
Multi area autofocus
Live view autofocus
Face detection focus
Contract detection focus
Phase detection focus
Total focus points 27 25
Lens
Lens mount type Pentax 645AF2 fixed lens
Lens zoom range - 24-600mm (25.0x)
Highest aperture - f/2.4-4.0
Macro focusing range - 3cm
Number of lenses 6 -
Crop factor 0.8 2.7
Screen
Screen type Tilting Tilting
Screen diagonal 3.2 inches 3 inches
Resolution of screen 1,037k dots 1,229k dots
Selfie friendly
Liveview
Touch friendly
Viewfinder Information
Viewfinder Optical (pentaprism) Electronic
Viewfinder resolution - 2,359k dots
Viewfinder coverage 98 percent 100 percent
Viewfinder magnification 0.85x 0.7x
Features
Min shutter speed 30 seconds 30 seconds
Max shutter speed 1/4000 seconds 1/2000 seconds
Max silent shutter speed - 1/32000 seconds
Continuous shutter rate 3.0 frames/s 14.0 frames/s
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Custom white balance
Image stabilization
Inbuilt flash
Flash distance no built-in flash 10.80 m (at Auto ISO)
Flash settings 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 Auto, fill-flash, slow sync, rear sync, off
External flash
AEB
White balance bracketing
Max flash synchronize 1/125 seconds -
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Supported video resolutions 1920 x 1080 (60i, 50i, 30p, 25p, 24p), 1280 x 720 (60p, 50p, 30p, 25p,24p) 3840 x 2160 (30p, 25p, 24p), 1920 x 1080 (60p, 60i, 24p) ,1440 x 1080 (30p), 640 x 480 (30p)
Highest video resolution 1920x1080 3840x2160
Video format MPEG-4, H.264 MPEG-4, AVCHD, XAVC S
Microphone port
Headphone port
Connectivity
Wireless None Built-In
Bluetooth
NFC
HDMI
USB USB 3.0 (5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS Optional None
Physical
Environment sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 1550g (3.42 lb) 1051g (2.32 lb)
Physical dimensions 156 x 117 x 123mm (6.1" x 4.6" x 4.8") 133 x 94 x 127mm (5.2" x 3.7" x 5.0")
DXO scores
DXO Overall rating 101 70
DXO Color Depth rating 26.0 23.1
DXO Dynamic range rating 14.7 12.6
DXO Low light rating 4505 472
Other
Battery life 650 images 420 images
Form of battery Battery Pack Battery Pack
Battery ID D-LI90 NP-FW50
Self timer Yes (2 or 10 secs) Yes (2 or 10 sec, continuous)
Time lapse feature
Storage type Dual SD/SDHC/SDXC slots SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
Card slots Dual Single
Price at release $5,024 $1,398