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Pentax K-S1 vs Pentax E90

Portability
69
Imaging
64
Features
70
Overall
66
Pentax K-S1 front
 
Pentax Optio E90 front
Portability
94
Imaging
33
Features
11
Overall
24

Pentax K-S1 vs Pentax E90 Key Specs

Pentax K-S1
(Full Review)
  • 20MP - APS-C Sensor
  • 3" Fixed Screen
  • ISO 100 - 51200
  • Sensor based Image Stabilization
  • No Anti-Alias Filter
  • 1/6000s Maximum Shutter
  • 1920 x 1080 video
  • Pentax KAF2 Mount
  • 558g - 121 x 93 x 70mm
  • Released August 2014
  • Later Model is Pentax K-S2
Pentax E90
(Full Review)
  • 10MP - 1/2.3" Sensor
  • 2.7" Fixed Screen
  • ISO 80 - 3200
  • 1280 x 720 video
  • 32-95mm (F3.1-5.9) lens
  • 145g - 102 x 59 x 25mm
  • Introduced January 2010
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Pentax K-S1 vs Pentax E90 Overview

Its time to look closer at the Pentax K-S1 vs Pentax E90, former is a Advanced DSLR while the latter is a Small Sensor Compact and both of them are built by Pentax. There exists a substantial gap between the resolutions of the K-S1 (20MP) and E90 (10MP) and the K-S1 (APS-C) and E90 (1/2.3") feature different sensor dimensions.

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The K-S1 was manufactured 4 years after the E90 which is quite a big difference as far as technology is concerned. Each of these cameras offer different body type with the Pentax K-S1 being a Mid-size SLR camera and the Pentax E90 being a Compact camera.

Before going straight into a complete comparison, below is a simple summary of how the K-S1 grades vs the E90 with regards to portability, imaging, features and an overall mark.

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Reasons to pick Pentax K-S1 over the Pentax E90

 K-S1 E90 
IntroducedAugust 2014January 2010Newer by 56 months
Focus manually Dial accurate focusing
Screen sizing3"2.7"Bigger screen (+0.3")
Screen resolution921k230kSharper screen (+691k dot)

Reasons to pick Pentax E90 over the Pentax K-S1

 E90 K-S1 

Common features in the Pentax K-S1 and Pentax E90

 K-S1 E90 
Screen typeFixed Fixed Fixed screen
Selfie screen Neither offers selfie screen
Touch friendly screen Absent Touch friendly screen

Pentax K-S1 vs Pentax E90 Physical Comparison

For those who are going to travel with your camera, you will need to factor its weight and proportions. The Pentax K-S1 offers physical measurements of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") with a weight of 558 grams (1.23 lbs) while the Pentax E90 has measurements of 102mm x 59mm x 25mm (4.0" x 2.3" x 1.0") with a weight of 145 grams (0.32 lbs).

Take a look at the Pentax K-S1 vs Pentax E90 in our brand new Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into account, the weight of an ILC will differ based on the lens you are utilizing at that time. The following is the front view over all size comparison of the K-S1 against the E90.

Pentax K-S1 vs Pentax E90 size comparison

Taking into account dimensions and weight, the portability rating of the K-S1 and E90 is 69 and 94 respectively.

Pentax K-S1 vs Pentax E90 top view buttons comparison

Pentax K-S1 vs Pentax E90 Sensor Comparison

Quite often, it is difficult to imagine the difference between sensor dimensions just by looking at a spec sheet. The picture here might give you a much better sense of the sensor sizing in the K-S1 and E90.

As you can see, the 2 cameras offer different resolutions and different sensor dimensions. The K-S1 because of its bigger sensor is going to make getting bokeh easier and the Pentax K-S1 will resolve greater detail due to its extra 10MP. Higher resolution will let you crop photographs a little more aggressively. The newer K-S1 provides an edge with regard to sensor innovation.

Pentax K-S1 vs Pentax E90 sensor size comparison

Pentax K-S1 vs Pentax E90 Screen and ViewFinder

Pentax K-S1 vs Pentax E90 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K-S1 as a Portrait photography camera
Pentax E90 as a Portrait photography camera
78
has manual focus
MP count decent (20MP)
sensor size is good (APS-C)
comes with face detect focus
exports RAW files
19
no manual focus
manual mode not possible
can't use external flash
low MP (10MP)
very small sensor (1/2.3")
no RAW format
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Street Comparison

Pentax K-S1 as a Street photography camera
Pentax E90 as a Street photography camera
73
built in image stabilization (Sensor based)
sensor size is good (APS-C)
exports RAW files
lighter than others in class (558 grams)
very good high ISO (51,200)
fixed screen
47
no moving screen
no image stabilization
very small sensor (1/2.3")
no RAW format
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Sports Comparison

Pentax K-S1 Sports photography advice
Pentax E90 Sports photography advice
69
high shutter speed (1/6,000s)
built in image stabilization (Sensor based)
MP count decent (20MP)
sensor size is good (APS-C)
comes with tracking focus
supports phase detect auto focus
continuous shooting slow (5.4 fps)
not so great battery power (410 per charge)
16
lack of shutter priority mode
no image stabilization
low MP (10 megapixels)
very small sensor (1/2.3")
no phase detect auto focus
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Travel Comparison

Pentax K-S1 Travel photography factors
Pentax E90 Travel photography factors
60
lighter than others in class (558 grams)
MP count decent (20MP)
built-in flash
lack of Time Lapse recording
not so great battery power (410 CIPA)
screen isn't selfie friendly
50
flash built-in
missing Timelapse function
low MP (10MP)
doesn't offer selfie friendly screen
wide angle not the best (32mm)
sluggish maximum aperture (f3.1)
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Landscape Comparison

Pentax K-S1 Landscape photography highlights
Pentax E90 Landscape photography highlights
73
has manual focus
swap lenses (Pentax KAF2 mount)
decent sized screen (3 inches)
built in image stabilization (Sensor based)
MP count decent (20MP)
sensor size is good (APS-C)
does not have low pass filter
very good high ISO (51,200)
exports RAW files
not so great battery power (410 per charge)
lack of Time Lapse recording
22
no manual focus
can't swap lenses (fixed lens mount)
wide angle not the best (32mm)
sluggish maximum aperture (f3.1)
screen is somewhat small (2.7 inches)
manual mode not possible
no image stabilization
low MP (10MP)
very small sensor (1/2.3")
no RAW format
missing Timelapse function
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Vlogging Comparison

Pentax K-S1 Vlogging information
Pentax E90 Vlogging information
33
built in image stabilization (Sensor based)
comes with face detect focus
high res video (1920 x 1080 pixels)
lighter than others in class (558 grams)
screen isn't selfie friendly
lack of mic port
22
wide angle not the best (32mm)
sluggish maximum aperture (f3.1)
doesn't offer selfie friendly screen
no image stabilization
low video resolution (1280 x 720 pixels)
missing microphone socket
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Pentax K-S1 vs Pentax E90 Specifications

Detailed spec comparison table for Pentax K-S1 and Pentax E90
 Pentax K-S1Pentax Optio E90
General Information
Company Pentax Pentax
Model type Pentax K-S1 Pentax Optio E90
Type Advanced DSLR Small Sensor Compact
Released 2014-08-27 2010-01-25
Physical type Mid-size SLR Compact
Sensor Information
Processor Chip Prime MII Prime
Sensor type CMOS CCD
Sensor size APS-C 1/2.3"
Sensor measurements 23.5 x 15.6mm 6.08 x 4.56mm
Sensor area 366.6mm² 27.7mm²
Sensor resolution 20 megapixels 10 megapixels
Anti alias filter
Aspect ratio 3:2 4:3 and 16:9
Highest resolution 5472 x 3648 3648 x 2736
Highest native ISO 51200 3200
Minimum native ISO 100 80
RAW support
Autofocusing
Manual focusing
Autofocus touch
Continuous autofocus
Autofocus single
Autofocus tracking
Selective autofocus
Center weighted autofocus
Autofocus multi area
Autofocus live view
Face detection focus
Contract detection focus
Phase detection focus
Total focus points 11 3
Lens
Lens support Pentax KAF2 fixed lens
Lens zoom range - 32-95mm (3.0x)
Maximum aperture - f/3.1-5.9
Macro focusing range - 6cm
Total lenses 151 -
Crop factor 1.5 5.9
Screen
Type of screen Fixed Type Fixed Type
Screen diagonal 3 inches 2.7 inches
Screen resolution 921k dots 230k dots
Selfie friendly
Liveview
Touch display
Viewfinder Information
Viewfinder type Optical (pentaprism) None
Viewfinder coverage 100 percent -
Viewfinder magnification 0.64x -
Features
Lowest shutter speed 30 seconds 4 seconds
Highest shutter speed 1/6000 seconds 1/2000 seconds
Continuous shooting rate 5.4fps -
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes -
Set white balance
Image stabilization
Integrated flash
Flash distance 10.00 m (at ISO 100) 3.50 m
Flash settings Auto, auto + redeye, on, on + redeye reduction, slow sync, trailing curtain sync, manual -
Hot shoe
Auto exposure bracketing
White balance bracketing
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Supported video resolutions 1920 x 1080 (30,25,24 fps), 1280 x 720 (60,50 fps) 1280 x 720 (15 fps), 848 x 480 (30 fps), 640 x 480 (30 fps), 320 x 240 (30 fps)
Highest video resolution 1920x1080 1280x720
Video file format H.264 Motion JPEG
Microphone port
Headphone port
Connectivity
Wireless Eye-Fi Connected None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS Optional None
Physical
Environment sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 558g (1.23 lbs) 145g (0.32 lbs)
Dimensions 121 x 93 x 70mm (4.8" x 3.7" x 2.8") 102 x 59 x 25mm (4.0" x 2.3" x 1.0")
DXO scores
DXO All around rating 78 not tested
DXO Color Depth rating 23.5 not tested
DXO Dynamic range rating 13.0 not tested
DXO Low light rating 1061 not tested
Other
Battery life 410 shots -
Form of battery Battery Pack -
Battery ID D-LI109 2 x AA
Self timer Yes ( 2 or 12 seconds) Yes (2 or 10 sec)
Time lapse feature
Storage type SD/SDHC/SDXC SD/SDHC, Internal
Card slots Single Single
Launch price $339 $100