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Pentax 645D vs Pentax K-r

Portability
50
Imaging
76
Features
52
Overall
66
Pentax 645D front
 
Pentax K-r front
Portability
67
Imaging
53
Features
52
Overall
52

Pentax 645D vs Pentax K-r Key Specs

Pentax 645D
(Full Review)
  • 40MP - Medium format Sensor
  • 3" Fixed Screen
  • ISO 200 - 1600
  • No Anti-Alias Filter
  • No Video
  • Pentax 645AF2 Mount
  • 1480g - 156 x 117 x 119mm
  • Announced March 2010
  • Replacement is Pentax 645Z
Pentax K-r
(Full Review)
  • 12MP - APS-C Sensor
  • 3" Fixed Screen
  • ISO 200 - 12800 (Raise to 25600)
  • Sensor based Image Stabilization
  • 1/6000s Max Shutter
  • 1280 x 720 video
  • Pentax KAF2 Mount
  • 598g - 125 x 97 x 68mm
  • Introduced March 2011
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Pentax 645D vs Pentax K-r Overview

The following is a extensive analysis of the Pentax 645D vs Pentax K-r, one is a Pro DSLR and the latter is a Entry-Level DSLR and they are both designed by Pentax. There exists a big gap between the image resolutions of the 645D (40MP) and K-r (12MP) and the 645D (Medium format) and K-r (APS-C) have different sensor sizes.

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The 645D was revealed 12 months prior to the K-r so they are of a similar generation. Both the cameras have different body design with the Pentax 645D being a Large SLR camera and the Pentax K-r being a Compact SLR camera.

Before we go into a full comparison, here is a simple view of how the 645D grades vs the K-r in relation to portability, imaging, features and an overall mark.

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Reasons to pick Pentax 645D over the Pentax K-r

 645D K-r 

Reasons to pick Pentax K-r over the Pentax 645D

 K-r 645D 
IntroducedMarch 2011March 2010Newer by 12 months

Common features in the Pentax 645D and Pentax K-r

 645D K-r 
Focus manually Very precise focus
Screen typeFixed Fixed Fixed screen
Screen dimensions3"3"Equal screen dimensions
Screen resolution921k921kExact same screen resolution
Selfie screen No selfie screen
Touch screen No Touch screen

Pentax 645D vs Pentax K-r Physical Comparison

In case you're aiming to travel with your camera, you need to factor in its weight and size. The Pentax 645D has outer measurements of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") and a weight of 1480 grams (3.26 lbs) whilst the Pentax K-r has specifications of 125mm x 97mm x 68mm (4.9" x 3.8" x 2.7") with a weight of 598 grams (1.32 lbs).

Compare the Pentax 645D vs Pentax K-r in the new Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Remember that, the weight of an Interchangeable Lens Camera will vary depending on the lens you are utilising at that time. Here is a front view proportions comparison of the 645D and the K-r.

Pentax 645D vs Pentax K-r size comparison

Taking into consideration dimensions and weight, the portability rating of the 645D and K-r is 50 and 67 respectively.

Pentax 645D vs Pentax K-r top view buttons comparison

Pentax 645D vs Pentax K-r Sensor Comparison

More often than not, it's hard to picture the difference between sensor dimensions purely by reading through specifications. The picture underneath should provide you a clearer sense of the sensor sizing in the 645D and K-r.

Plainly, the 2 cameras have different resolutions and different sensor dimensions. The 645D using its bigger sensor is going to make getting shallow depth of field less difficult and the Pentax 645D will resolve more detail because of its extra 28 Megapixels. Higher resolution will enable you to crop photographs a bit more aggressively. The more aged 645D is going to be disadvantaged with regard to sensor tech.

Pentax 645D vs Pentax K-r sensor size comparison

Pentax 645D vs Pentax K-r Screen and ViewFinder

Pentax 645D vs Pentax K-r Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Portrait photography with Pentax 645D
Portrait photography with Pentax K-r
77
you can focus manually
MP count excellent (40MP)
large sensor size (Medium format)
exports RAW files
does not have liveview
63
manual focus
sensor size is good (APS-C)
offers face detection focus
delivers RAW files
low MP (12 megapixels)
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Street Comparison

Pentax 645D Street photography information
Pentax K-r Street photography information
58
large sensor size (Medium format)
exports RAW files
weather proof
screen is fixed
does not have image stabilization
67
image stabilization (Sensor based)
sensor size is good (APS-C)
delivers RAW files
no articulating screen
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Sports Comparison

Pentax 645D Sports photography info
Pentax K-r Sports photography info
63
MP count excellent (40MP)
large sensor size (Medium format)
weather proof
comes with phase detect AF
does not have liveview
max fps low (1.0 frames/s)
does not have image stabilization
bad battery power (800 CIPA)
55
high shutter speed (1/6,000 seconds)
image stabilization (Sensor based)
sensor size is good (APS-C)
sensor has phase detect auto focus
max frames per second very slow (6.0 frames per second)
low MP (12MP)
not so great battery life (470 shots)
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Travel Comparison

Pentax 645D Travel photography info
Pentax K-r Travel photography info
55
weather proof
MP count excellent (40MP)
bad battery power (800 per charge)
doesn't posses selfie friendly display
47
has built in flash
not so great battery life (470 shots)
low MP (12 megapixels)
screen isn't selfie friendly
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Landscape Comparison

Pentax 645D Landscape photography features
Pentax K-r Landscape photography features
72
you can focus manually
switch lenses (Pentax 645AF2 mount)
pretty good screen size (3 inch)
MP count excellent (40MP)
large sensor size (Medium format)
doesnt have low pass filter
exports RAW files
weather proof
two card slots
does not have liveview
does not have image stabilization
bad battery power (800 shots)
65
manual focus
change lenses (Pentax KAF2 mount)
screen is a decent size (3 inch)
image stabilization (Sensor based)
sensor size is good (APS-C)
delivers RAW files
low MP (12MP)
not so great battery life (470 per charge)
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Vlogging Comparison

Pentax 645D Vlogging details
Pentax K-r Vlogging details
9
can't record video
26
image stabilization (Sensor based)
offers face detection focus
screen isn't selfie friendly
low res video (1280 x 720 pxls)
does not have external microphone jack
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Pentax 645D vs Pentax K-r Specifications

Detailed spec comparison table for Pentax 645D and Pentax K-r
 Pentax 645DPentax K-r
General Information
Make Pentax Pentax
Model Pentax 645D Pentax K-r
Category Pro DSLR Entry-Level DSLR
Announced 2010-03-10 2011-03-11
Body design Large SLR Compact SLR
Sensor Information
Powered by Prime II Prime II
Sensor type CCD CMOS
Sensor size Medium format APS-C
Sensor measurements 44 x 33mm 23.6 x 15.8mm
Sensor surface area 1,452.0mm² 372.9mm²
Sensor resolution 40 megapixels 12 megapixels
Anti aliasing filter
Aspect ratio 4:3 3:2
Highest Possible resolution 7264 x 5440 4288 x 2848
Maximum native ISO 1600 12800
Maximum enhanced ISO - 25600
Lowest native ISO 200 200
RAW format
Lowest enhanced ISO 100 100
Autofocusing
Focus manually
Autofocus touch
Continuous autofocus
Autofocus single
Tracking autofocus
Autofocus selectice
Center weighted autofocus
Autofocus multi area
Live view autofocus
Face detection focus
Contract detection focus
Phase detection focus
Number of focus points 11 11
Cross focus points - 9
Lens
Lens mounting type Pentax 645AF2 Pentax KAF2
Number of lenses 6 151
Focal length multiplier 0.8 1.5
Screen
Range of screen Fixed Type Fixed Type
Screen diagonal 3 inches 3 inches
Resolution of screen 921k dot 921k dot
Selfie friendly
Liveview
Touch function
Screen tech TFT Color LCD with wide-viewing angle and with AR coating TFT LCD monitor
Viewfinder Information
Viewfinder type Optical (pentaprism) Optical (pentamirror)
Viewfinder coverage 98 percent 96 percent
Viewfinder magnification 0.85x 0.57x
Features
Minimum shutter speed 30 secs 30 secs
Fastest shutter speed 1/4000 secs 1/6000 secs
Continuous shutter speed 1.0fps 6.0fps
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Change white balance
Image stabilization
Built-in flash
Flash range no built-in flash 12.00 m (at ISO 100)
Flash settings Auto, On, Off, Red-eye, Slow Sync, Rear Curtain Auto, Red-eye Reduction, Slow-speed Sync, Trailing Curtain Sync, High-Speed Sync and Wireless Sync
Hot shoe
AEB
White balance bracketing
Fastest flash sync 1/125 secs 1/180 secs
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Supported video resolutions - 1280 x 720 (25 fps), 640 x 480 (25 fps)
Maximum video resolution None 1280x720
Video format - Motion JPEG
Microphone input
Headphone input
Connectivity
Wireless None None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None Optional
Physical
Environmental seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 1480 grams (3.26 lb) 598 grams (1.32 lb)
Physical dimensions 156 x 117 x 119mm (6.1" x 4.6" x 4.7") 125 x 97 x 68mm (4.9" x 3.8" x 2.7")
DXO scores
DXO Overall score 82 72
DXO Color Depth score 24.6 22.9
DXO Dynamic range score 12.6 12.4
DXO Low light score 1262 755
Other
Battery life 800 shots 470 shots
Form of battery Battery Pack Battery Pack
Battery model D-LI90 D-LI109,4 x AA
Self timer Yes (2 or 10 sec) Yes (2 or 12 sec)
Time lapse shooting
Storage media SD/SDHC SD/SDHC
Storage slots 2 1
Cost at release $4,000 $1,100