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Pentax 645Z vs Sony T90

Portability
49
Imaging
81
Features
74
Overall
78
Pentax 645Z front
 
Sony Cyber-shot DSC-T90 front
Portability
96
Imaging
35
Features
26
Overall
31

Pentax 645Z vs Sony T90 Key Specs

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
  • Launched April 2014
  • Replaced the Pentax 645D
Sony T90
(Full Review)
  • 12MP - 1/2.3" Sensor
  • 3" Fixed Display
  • ISO 80 - 3200
  • Optical Image Stabilization
  • 1280 x 720 video
  • 35-140mm (F3.5-10.0) lens
  • 148g - 94 x 57 x 15mm
  • Announced February 2009
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Pentax 645Z vs Sony T90 Overview

In this article, we are comparing the Pentax 645Z versus Sony T90, one being a Pro DSLR and the other is a Ultracompact by competitors Pentax and Sony. There exists a big gap among the sensor resolutions of the 645Z (51MP) and T90 (12MP) and the 645Z (Medium format) and T90 (1/2.3") use different sensor sizes.

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The 645Z was unveiled 5 years later than the T90 and that is a fairly big gap as far as camera technology is concerned. Both cameras offer different body type with the Pentax 645Z being a Large SLR camera and the Sony T90 being a Ultracompact camera.

Before we go through a complete comparison, below is a brief summation of how the 645Z scores against the T90 in the way of portability, imaging, features and an overall rating.

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Reasons to pick Pentax 645Z over the Sony T90

 645Z T90 
AnnouncedApril 2014February 2009Fresher by 63 months
Display typeTiltingFixed Tilting display
Display sizing3.2"3"Larger display (+0.2")
Display resolution1037k230kSharper display (+807k dot)

Reasons to pick Sony T90 over the Pentax 645Z

 T90 645Z 
Touch friendly display Easily navigate

Common features in the Pentax 645Z and Sony T90

 645Z T90 
Focus manually Dial precise focus
Selfie screen Neither comes with selfie screen

Pentax 645Z vs Sony T90 Physical Comparison

For anybody who is intending to carry your camera frequently, you should take into account its weight and volume. The Pentax 645Z comes with external measurements 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 T90 has sizing of 94mm x 57mm x 15mm (3.7" x 2.2" x 0.6") along with a weight of 148 grams (0.33 lbs).

Check out the Pentax 645Z versus Sony T90 in the latest Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into account, the weight of an Interchangeable Lens Camera will vary depending on the lens you select at that moment. Below is the front view dimensions comparison of the 645Z against the T90.

Pentax 645Z vs Sony T90 size comparison

Taking into account dimensions and weight, the portability grade of the 645Z and T90 is 49 and 96 respectively.

Pentax 645Z vs Sony T90 top view buttons comparison

Pentax 645Z vs Sony T90 Sensor Comparison

More often than not, it's difficult to picture the contrast in sensor sizing merely by looking through specs. The visual underneath should provide you a greater sense of the sensor sizing in the 645Z and T90.

As you can plainly see, both of these cameras offer different megapixels and different sensor sizing. The 645Z having a larger sensor is going to make achieving shallow DOF less difficult and the Pentax 645Z will provide you with greater detail having an extra 39MP. Greater resolution can also enable you to crop photos a little more aggressively. The more recent 645Z provides an edge with regard to sensor technology.

Pentax 645Z vs Sony T90 sensor size comparison

Pentax 645Z vs Sony T90 Screen and ViewFinder

Pentax 645Z vs Sony T90 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax 645Z Portrait photography details
Sony T90 Portrait photography details
88
manual focus
great megapixels (51 megapixels)
great sensor size (Medium format)
provides face detection focusing
exports RAW formats
27
you can focus manually
no manual exposure
no external flash support
resolution not great (12 megapixels)
tiny sensor size (1/2.3")
lack of RAW files
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Street Comparison

Pentax 645Z Street photography advice
Sony T90 Street photography advice
63
tilting screen
great sensor size (Medium format)
exports RAW formats
weather sealing
very good high ISO (204,800)
no image stabilization
more heavy than others in class (1,550 grams)
55
built in image stabilization (Optical)
no articulating screen
tiny sensor size (1/2.3")
lack of RAW files
more heavy than competition in class (148g)
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Sports Comparison

Pentax 645Z Sports photography features
Sony T90 Sports photography features
71
great megapixels (51 megapixels)
great sensor size (Medium format)
provides tracking autofocus
weather sealing
comes with phase detect AF
max fps low (3.0 frames per second)
no image stabilization
low battery power (650 shots)
25
built in image stabilization (Optical)
max frames per second low (2.0 frames per second)
no shutter priority mode
resolution not great (12 megapixels)
tiny sensor size (1/2.3")
lack of phase detect autofocus
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Travel Comparison

Pentax 645Z Travel photography factors
Sony T90 Travel photography factors
51
weather sealing
great megapixels (51MP)
low battery power (650 per charge)
more heavy than others in class (1,550 grams)
display is not selfie friendly
51
has built in flash
no Timelapse function
more heavy than competition in class (148g)
resolution not great (12MP)
display isn't selfie friendly
wide angle not great (35mm)
somewhat slow max aperture (f3.5)
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Landscape Comparison

Pentax 645Z Landscape photography information
Sony T90 Landscape photography information
78
manual focus
switch lenses (Pentax 645AF2 mount)
pretty good screen size (3.2 inches)
great megapixels (51MP)
great sensor size (Medium format)
no low pass filter
very good high ISO (204,800)
exports RAW formats
weather sealing
has double storage slots
no image stabilization
low battery power (650 CIPA)
37
you can focus manually
pretty good screen size (3 inches)
built in image stabilization (Optical)
lens is fixed (fixed lens mount)
wide angle not great (35mm)
somewhat slow max aperture (f3.5)
no manual exposure
resolution not great (12MP)
tiny sensor size (1/2.3")
lack of RAW files
no Timelapse function
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Vlogging Comparison

Vlogging with Pentax 645Z
Vlogging with Sony T90
27
provides face detection focusing
high video quality (1920 x 1080 pxls)
does have external microphone port
display is not selfie friendly
no image stabilization
more heavy than others in class (1,550 grams)
27
touchscreen functionality
built in image stabilization (Optical)
wide angle not great (35mm)
somewhat slow max aperture (f3.5)
display isn't selfie friendly
video quality not great (1280 x 720 resolution)
no microphone jack
more heavy than competition in class (148g)
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Pentax 645Z vs Sony T90 Specifications

Detailed spec comparison table for Pentax 645Z and Sony T90
 Pentax 645ZSony Cyber-shot DSC-T90
General Information
Brand Pentax Sony
Model Pentax 645Z Sony Cyber-shot DSC-T90
Class Pro DSLR Ultracompact
Launched 2014-04-15 2009-02-17
Body design Large SLR Ultracompact
Sensor Information
Processor PRIME III -
Sensor type CMOS CCD
Sensor size Medium format 1/2.3"
Sensor measurements 44 x 33mm 6.17 x 4.55mm
Sensor surface area 1,452.0mm² 28.1mm²
Sensor resolution 51 megapixel 12 megapixel
Anti aliasing filter
Aspect ratio 4:3 4:3, 3:2 and 16:9
Maximum resolution 8256 x 6192 4000 x 3000
Maximum native ISO 204800 3200
Min native ISO 100 80
RAW support
Autofocusing
Focus manually
Touch to focus
Continuous AF
Single AF
Tracking AF
AF selectice
Center weighted AF
AF multi area
Live view AF
Face detect AF
Contract detect AF
Phase detect AF
Number of focus points 27 9
Lens
Lens mount Pentax 645AF2 fixed lens
Lens focal range - 35-140mm (4.0x)
Maximal aperture - f/3.5-10.0
Available lenses 6 -
Crop factor 0.8 5.8
Screen
Range of display Tilting Fixed Type
Display sizing 3.2" 3"
Display resolution 1,037k dot 230k dot
Selfie friendly
Liveview
Touch display
Viewfinder Information
Viewfinder type Optical (pentaprism) None
Viewfinder coverage 98 percent -
Viewfinder magnification 0.85x -
Features
Slowest shutter speed 30 seconds 1 seconds
Maximum shutter speed 1/4000 seconds 1/1600 seconds
Continuous shooting speed 3.0 frames per sec 2.0 frames per sec
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes -
Change WB
Image stabilization
Inbuilt flash
Flash range no built-in flash 2.90 m (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, On, Off, Red-Eye reduction, Slow Sync
External flash
AE bracketing
White balance bracketing
Maximum flash sync 1/125 seconds -
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions 1920 x 1080 (60i, 50i, 30p, 25p, 24p), 1280 x 720 (60p, 50p, 30p, 25p,24p) 1280 x 720 (30 fps) 640 x 480 (30 fps)
Maximum video resolution 1920x1080 1280x720
Video data format MPEG-4, H.264 Motion JPEG
Microphone input
Headphone input
Connectivity
Wireless None None
Bluetooth
NFC
HDMI
USB USB 3.0 (5 GBit/sec) USB 2.0 (480 Mbit/sec)
GPS Optional None
Physical
Environment seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 1550 gr (3.42 lbs) 148 gr (0.33 lbs)
Dimensions 156 x 117 x 123mm (6.1" x 4.6" x 4.8") 94 x 57 x 15mm (3.7" x 2.2" x 0.6")
DXO scores
DXO All around score 101 not tested
DXO Color Depth score 26.0 not tested
DXO Dynamic range score 14.7 not tested
DXO Low light score 4505 not tested
Other
Battery life 650 images -
Battery format Battery Pack -
Battery model D-LI90 -
Self timer Yes (2 or 10 secs) Yes (2 or 10 sec)
Time lapse feature
Type of storage Dual SD/SDHC/SDXC slots Memory Stick Duo / Pro Duo, Internal
Storage slots Two Single
Retail pricing $5,024 $259