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Pentax 645D vs Sony RX1

Portability
50
Imaging
76
Features
52
Overall
66
Pentax 645D front
 
Sony Cyber-shot DSC-RX1 front
Portability
79
Imaging
70
Features
57
Overall
64

Pentax 645D vs Sony RX1 Key Specs

Pentax 645D
(Full Review)
  • 40MP - Medium format Sensor
  • 3" Fixed Display
  • ISO 200 - 1600
  • No Anti-Alias Filter
  • No Video
  • Pentax 645AF2 Mount
  • 1480g - 156 x 117 x 119mm
  • Revealed March 2010
  • New Model is Pentax 645Z
Sony RX1
(Full Review)
  • 24MP - Full frame Sensor
  • 3" Fixed Display
  • ISO 100 - 25600
  • 1920 x 1080 video
  • 35mm (F2.0-22.0) lens
  • 482g - 113 x 65 x 70mm
  • Announced February 2013
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Pentax 645D vs Sony RX1 Overview

The following is a extensive review of the Pentax 645D and Sony RX1, one is a Pro DSLR and the other is a Large Sensor Compact by rivals Pentax and Sony. There is a crucial difference among the resolutions of the 645D (40MP) and RX1 (24MP) and the 645D (Medium format) and RX1 (Full frame) posses different sensor measurements.

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The 645D was released 3 years prior to the RX1 which is a fairly serious gap as far as camera tech is concerned. Both of these cameras feature different body design with the Pentax 645D being a Large SLR camera and the Sony RX1 being a Large Sensor Compact camera.

Before going straight to a in depth comparison, here is a quick summary of how the 645D scores versus the RX1 for portability, imaging, features and an overall mark.

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Reasons to pick Pentax 645D over the Sony RX1

 645D RX1 

Reasons to pick Sony RX1 over the Pentax 645D

 RX1 645D 
AnnouncedFebruary 2013March 2010Newer by 35 months
Display resolution1229k921kCrisper display (+308k dot)

Common features in the Pentax 645D and Sony RX1

 645D RX1 
Manual focus Dial precise focusing
Display typeFixed Fixed Fixed display
Display size3"3"Same display measurements
Selfie screen Neither features selfie screen
Touch display Neither features Touch display

Pentax 645D vs Sony RX1 Physical Comparison

For anybody who is planning to travel with your camera, you should factor in its weight and volume. The Pentax 645D enjoys outside measurements of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") and a weight of 1480 grams (3.26 lbs) while the Sony RX1 has sizing of 113mm x 65mm x 70mm (4.4" x 2.6" x 2.8") with a weight of 482 grams (1.06 lbs).

Take a look at the Pentax 645D and Sony RX1 in the latest Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Always remember, the weight of an Interchangeable Lens Camera will change dependant on the lens you are working with at that moment. Underneath is a front view measurement comparison of the 645D and the RX1.

Pentax 645D vs Sony RX1 size comparison

Looking at size and weight, the portability score of the 645D and RX1 is 50 and 79 respectively.

Pentax 645D vs Sony RX1 top view buttons comparison

Pentax 645D vs Sony RX1 Sensor Comparison

Often, it's tough to imagine the difference in sensor dimensions just by looking through specifications. The pic underneath might provide you a stronger sense of the sensor sizing in the 645D and RX1.

To sum up, both of these cameras feature different megapixel count and different sensor dimensions. The 645D featuring a larger sensor is going to make achieving shallower DOF simpler and the Pentax 645D will render extra detail as a result of its extra 16MP. Greater resolution will enable you to crop photos way more aggressively. The more aged 645D will be disadvantaged with regard to sensor technology.

Pentax 645D vs Sony RX1 sensor size comparison

Pentax 645D vs Sony RX1 Screen and ViewFinder

Pentax 645D vs Sony RX1 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax 645D Portrait photography information
Sony RX1 Portrait photography information
77
you can focus manually
MP count great (40 megapixels)
sensor size is large (Medium format)
supports RAW formats
does not have liveview
82
focusing manually
flash sync is higher than normal (1/4,000 seconds)
MP count good (24MP)
sensor size is big (Full frame)
offers face detection autofocus
supports RAW formats
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Street Comparison

Pentax 645D Street photography factors
Sony RX1 Street photography factors
58
sensor size is large (Medium format)
supports RAW formats
weather proofing
fixed screen
lack of image stabilization
66
sensor size is big (Full frame)
supports RAW formats
good ISO range (25,600)
screen does not articulate
no image stabilization
heavier than competition (482g)
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Sports Comparison

Pentax 645D Sports photography factors
Sony RX1 Sports photography factors
63
MP count great (40 megapixels)
sensor size is large (Medium format)
weather proofing
supports phase detect autofocus
does not have liveview
continuous shooting slow (1.0 frames per second)
lack of image stabilization
terrible battery pack (800 per charge)
53
MP count good (24MP)
sensor size is big (Full frame)
offers tracking autofocus
focal length is fixed (35mm)
very slow continuous shooting (5.0 fps)
no image stabilization
low battery pack (270 shots)
no phase detect autofocus
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Travel Comparison

Travel photography with Pentax 645D
Travel photography with Sony RX1
55
weather proofing
MP count great (40 megapixels)
terrible battery pack (800 per charge)
does not posses selfie friendly screen
62
MP count good (24MP)
has built in flash
good maximum aperture (f2.0)
missing Time Lapse function
low battery pack (270 CIPA)
heavier than competition (482g)
does not contain selfie friendly display
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Landscape Comparison

Pentax 645D as a Landscape photography camera
Sony RX1 as a Landscape photography camera
72
you can focus manually
change lenses (Pentax 645AF2 mount)
decent sized screen (3 inch)
MP count great (40MP)
sensor size is large (Medium format)
does not have low pass filter
supports RAW formats
weather proofing
2 card slots
does not have liveview
lack of image stabilization
terrible battery pack (800 CIPA)
65
focusing manually
good maximum aperture (f2.0)
screen size is good (3")
MP count good (24 megapixels)
sensor size is big (Full frame)
good ISO range (25,600)
supports RAW formats
can't change lens (fixed lens mount)
focal length is fixed (35mm)
no image stabilization
low battery pack (270 shots)
missing Time Lapse function
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Vlogging Comparison

Pentax 645D Vlogging info
Sony RX1 Vlogging info
9
no video
34
good maximum aperture (f2.0)
offers face detection autofocus
video resolution high (1920 x 1080 resolution)
does have external mic jack
does not contain selfie friendly display
no image stabilization
heavier than competition (482 grams)
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Pentax 645D vs Sony RX1 Specifications

Detailed spec comparison table for Pentax 645D and Sony RX1
 Pentax 645DSony Cyber-shot DSC-RX1
General Information
Manufacturer Pentax Sony
Model type Pentax 645D Sony Cyber-shot DSC-RX1
Category Pro DSLR Large Sensor Compact
Revealed 2010-03-10 2013-02-19
Body design Large SLR Large Sensor Compact
Sensor Information
Powered by Prime II -
Sensor type CCD CMOS
Sensor size Medium format Full frame
Sensor dimensions 44 x 33mm 35.8 x 23.8mm
Sensor area 1,452.0mm² 852.0mm²
Sensor resolution 40 megapixels 24 megapixels
Anti alias filter
Aspect ratio 4:3 3:2 and 16:9
Peak resolution 7264 x 5440 6000 x 4000
Highest native ISO 1600 25600
Minimum native ISO 200 100
RAW files
Minimum enhanced ISO 100 -
Autofocusing
Manual focusing
Touch focus
Continuous autofocus
Single autofocus
Tracking autofocus
Autofocus selectice
Autofocus center weighted
Autofocus multi area
Live view autofocus
Face detect autofocus
Contract detect autofocus
Phase detect autofocus
Total focus points 11 25
Lens
Lens mount type Pentax 645AF2 fixed lens
Lens zoom range - 35mm (1x)
Max aperture - f/2.0-22.0
Number of lenses 6 -
Crop factor 0.8 1
Screen
Range of display Fixed Type Fixed Type
Display sizing 3 inch 3 inch
Display resolution 921k dot 1,229k dot
Selfie friendly
Liveview
Touch operation
Display technology TFT Color LCD with wide-viewing angle and with AR coating Xtra FineTFT LCD
Viewfinder Information
Viewfinder Optical (pentaprism) Electronic and Optical (optional)
Viewfinder coverage 98 percent -
Viewfinder magnification 0.85x -
Features
Min shutter speed 30s 30s
Max shutter speed 1/4000s 1/4000s
Continuous shutter speed 1.0 frames per second 5.0 frames per second
Shutter priority
Aperture priority
Manual exposure
Exposure compensation Yes Yes
Set white balance
Image stabilization
Built-in flash
Flash distance no built-in flash 6.00 m
Flash modes Auto, On, Off, Red-eye, Slow Sync, Rear Curtain Auto, On, Off, Slow Sync
Hot shoe
AEB
WB bracketing
Max flash sync 1/125s 1/4000s
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Supported video resolutions - 1920 x 1080 (60, 50, 25, 24 fps), 1440 x 1080 (30, 25 fps), 1280 x 720 (30 fps), 640 x 480 (30, 25 fps)
Highest video resolution None 1920x1080
Video format - MPEG-4, AVCHD
Mic input
Headphone input
Connectivity
Wireless None Eye-Fi Connected
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environment seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 1480g (3.26 pounds) 482g (1.06 pounds)
Physical dimensions 156 x 117 x 119mm (6.1" x 4.6" x 4.7") 113 x 65 x 70mm (4.4" x 2.6" x 2.8")
DXO scores
DXO Overall rating 82 93
DXO Color Depth rating 24.6 25.1
DXO Dynamic range rating 12.6 14.3
DXO Low light rating 1262 2534
Other
Battery life 800 photos 270 photos
Battery format Battery Pack Battery Pack
Battery ID D-LI90 NP-BX1
Self timer Yes (2 or 10 sec) Yes (2 or 10 sec)
Time lapse shooting
Storage media SD/SDHC SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
Storage slots Two One
Cost at release $4,000 $2,798