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Pentax 645D vs Pentax W90

Portability
50
Imaging
76
Features
52
Overall
66
Pentax 645D front
 
Pentax Optio W90 front
Portability
94
Imaging
35
Features
21
Overall
29

Pentax 645D vs Pentax W90 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
  • Released March 2010
  • Replacement is Pentax 645Z
Pentax W90
(Full Review)
  • 12MP - 1/2.3" Sensor
  • 2.7" Fixed Display
  • ISO 80 - 6400
  • 1280 x 720 video
  • 28-140mm (F3.5-5.5) lens
  • 164g - 108 x 59 x 25mm
  • Introduced February 2010
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Pentax 645D vs Pentax W90 Overview

Following is a extensive analysis of the Pentax 645D and Pentax W90, one is a Pro DSLR and the other is a Waterproof and they are both created by Pentax. There exists a significant gap between the sensor resolutions of the 645D (40MP) and W90 (12MP) and the 645D (Medium format) and W90 (1/2.3") enjoy different sensor sizes.

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The 645D was manufactured within a month of the W90 which means that they are of a similar generation. Each of these cameras offer different body type with the Pentax 645D being a Large SLR camera and the Pentax W90 being a Compact camera.

Before diving straight into a detailed comparison, below is a concise highlight of how the 645D matches up vs the W90 in relation to portability, imaging, features and an overall score.

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Reasons to pick Pentax 645D over the Pentax W90

 645D W90 
Display sizing3"2.7"Larger display (+0.3")
Display resolution921k230kClearer display (+691k dot)

Reasons to pick Pentax W90 over the Pentax 645D

 W90 645D 

Common features in the Pentax 645D and Pentax W90

 645D W90 
IntroducedMarch 2010February 2010Similar generation
Manually focus Very exact focusing
Display typeFixed Fixed Fixed display
Selfie screen Neither comes with selfie screen
Touch display Neither comes with Touch display

Pentax 645D vs Pentax W90 Physical Comparison

For anyone who is looking to carry around your camera regularly, you should factor its weight and proportions. The Pentax 645D comes with exterior dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") accompanied by a weight of 1480 grams (3.26 lbs) whilst the Pentax W90 has measurements of 108mm x 59mm x 25mm (4.3" x 2.3" x 1.0") along with a weight of 164 grams (0.36 lbs).

Compare the Pentax 645D and Pentax W90 in the latest Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into consideration, the weight of an Interchangeable Lens Camera will change dependant on the lens you have during that time. The following is the front view proportions comparison of the 645D vs the W90.

Pentax 645D vs Pentax W90 size comparison

Looking at dimensions and weight, the portability rating of the 645D and W90 is 50 and 94 respectively.

Pentax 645D vs Pentax W90 top view buttons comparison

Pentax 645D vs Pentax W90 Sensor Comparison

More often than not, its tough to imagine the gap between sensor sizes simply by checking specifications. The pic here will help provide you a more clear sense of the sensor dimensions in the 645D and W90.

To sum up, both of those cameras offer different megapixels and different sensor sizes. The 645D due to its larger sensor is going to make achieving shallow DOF easier and the Pentax 645D will give more detail due to its extra 28 Megapixels. Greater resolution will help you crop photos a little more aggressively.

Pentax 645D vs Pentax W90 sensor size comparison

Pentax 645D vs Pentax W90 Screen and ViewFinder

Pentax 645D vs Pentax W90 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax 645D Portrait photography info
Pentax W90 Portrait photography info
77
you can focus manually
megapixel count high (40 megapixels)
sensor size is big (Medium format)
exports RAW files
doesn't have liveview
27
you can focus manually
no manual exposure
no external flash support
low resolution (12 megapixels)
sensor is very small (1/2.3")
doesn't have RAW support
Photography Glossary

Street Comparison

Street photography with Pentax 645D
Street photography with Pentax W90
58
sensor size is big (Medium format)
exports RAW files
environment proofing
fixed screen
lack of image stabilization
54
environment proof
fixed screen
lack of image stabilization
sensor is very small (1/2.3")
doesn't have RAW support
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Sports Comparison

Sports photography with Pentax 645D
Sports photography with Pentax W90
63
megapixel count high (40 megapixels)
sensor size is big (Medium format)
environment proofing
sensor has phase detect AF
doesn't have liveview
low frames per second (1.0 fps)
lack of image stabilization
low battery power (800 shots)
24
environment proof
continuous shooting slow (1.0 frames/s)
lack of shutter priority mode
lack of image stabilization
low resolution (12MP)
sensor is very small (1/2.3")
doesn't have phase detect AF
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Travel Comparison

Pentax 645D Travel photography features
Pentax W90 Travel photography features
55
environment proofing
megapixel count high (40 megapixels)
low battery power (800 CIPA)
doesn't offer selfie friendly screen
64
environment proof
has built in flash
quite wide (28mm)
low resolution (12MP)
does not posses selfie friendly display
slow maximum aperture (f3.5)
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Landscape Comparison

Landscape photography with Pentax 645D
Landscape photography with Pentax W90
72
you can focus manually
change lenses (Pentax 645AF2 mount)
nice screen size (3")
megapixel count high (40 megapixels)
sensor size is big (Medium format)
no anti aliasing filter
exports RAW files
environment proofing
two card slots
doesn't have liveview
lack of image stabilization
low battery power (800 shots)
37
you can focus manually
quite wide (28mm)
environment proof
cannot swap lens (fixed lens mount)
slow maximum aperture (f3.5)
screen is small (2.7 inches)
no manual exposure
lack of image stabilization
low resolution (12 megapixels)
sensor is very small (1/2.3")
doesn't have RAW support
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Vlogging Comparison

Pentax 645D Vlogging advice
Pentax W90 Vlogging advice
9
no video recording
25
quite wide (28mm)
slow maximum aperture (f3.5)
does not posses selfie friendly display
lack of image stabilization
low video resolution (1280 x 720 resolution)
no external microphone socket
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Pentax 645D vs Pentax W90 Specifications

Detailed spec comparison table for Pentax 645D and Pentax W90
 Pentax 645DPentax Optio W90
General Information
Brand Pentax Pentax
Model Pentax 645D Pentax Optio W90
Type Pro DSLR Waterproof
Released 2010-03-10 2010-02-24
Physical type Large SLR Compact
Sensor Information
Powered by Prime II Prime
Sensor type CCD CCD
Sensor size Medium format 1/2.3"
Sensor measurements 44 x 33mm 6.17 x 4.55mm
Sensor area 1,452.0mm² 28.1mm²
Sensor resolution 40 megapixel 12 megapixel
Anti aliasing filter
Aspect ratio 4:3 4:3, 3:2 and 16:9
Max resolution 7264 x 5440 4000 x 3000
Max native ISO 1600 6400
Lowest native ISO 200 80
RAW photos
Lowest enhanced ISO 100 -
Autofocusing
Manual focus
AF touch
Continuous AF
AF single
AF tracking
Selective AF
Center weighted AF
AF multi area
AF live view
Face detect focusing
Contract detect focusing
Phase detect focusing
Number of focus points 11 9
Lens
Lens mount Pentax 645AF2 fixed lens
Lens focal range - 28-140mm (5.0x)
Maximum aperture - f/3.5-5.5
Macro focus distance - 1cm
Number of lenses 6 -
Focal length multiplier 0.8 5.8
Screen
Display type Fixed Type Fixed Type
Display diagonal 3 inches 2.7 inches
Display resolution 921 thousand dots 230 thousand dots
Selfie friendly
Liveview
Touch capability
Display tech TFT Color LCD with wide-viewing angle and with AR coating -
Viewfinder Information
Viewfinder type Optical (pentaprism) None
Viewfinder coverage 98% -
Viewfinder magnification 0.85x -
Features
Minimum shutter speed 30 secs 4 secs
Fastest shutter speed 1/4000 secs 1/1500 secs
Continuous shutter rate 1.0 frames/s 1.0 frames/s
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes -
Custom WB
Image stabilization
Integrated flash
Flash range no built-in flash 3.90 m
Flash settings Auto, On, Off, Red-eye, Slow Sync, Rear Curtain Auto, On, Off, Red-eye, Soft
Hot shoe
AEB
White balance bracketing
Fastest flash synchronize 1/125 secs -
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Video resolutions - 1280 x 720 (30, 15 fps), 640 x 480 (30, 15 fps), 320 x 240 (30, 15 fps)
Max video resolution None 1280x720
Video data format - Motion JPEG
Microphone port
Headphone port
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
Environmental sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 1480g (3.26 lbs) 164g (0.36 lbs)
Dimensions 156 x 117 x 119mm (6.1" x 4.6" x 4.7") 108 x 59 x 25mm (4.3" x 2.3" x 1.0")
DXO scores
DXO Overall score 82 not tested
DXO Color Depth score 24.6 not tested
DXO Dynamic range score 12.6 not tested
DXO Low light score 1262 not tested
Other
Battery life 800 images -
Battery type Battery Pack -
Battery model D-LI90 D-LI68
Self timer Yes (2 or 10 sec) Yes (2 or 10 sec)
Time lapse shooting
Type of storage SD/SDHC SD/SDHC card, Internal
Card slots Dual Single
Price at release $4,000 $120