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Pentax K-S1 vs Pentax K100D

Portability
69
Imaging
63
Features
70
Overall
65
Pentax K-S1 front
 
Pentax K100D front
Portability
64
Imaging
45
Features
36
Overall
41

Pentax K-S1 vs Pentax K100D 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 Max Shutter
  • 1920 x 1080 video
  • Pentax KAF2 Mount
  • 558g - 121 x 93 x 70mm
  • Introduced August 2014
  • Later Model is Pentax K-S2
Pentax K100D
(Full Review)
  • 6MP - APS-C Sensor
  • 2.5" Fixed Display
  • ISO 200 - 3200
  • Sensor based Image Stabilization
  • No Video
  • Pentax KAF Mount
  • 660g - 129 x 93 x 70mm
  • Introduced December 2006
  • New Model is Pentax K100D S
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Pentax K-S1 vs Pentax K100D Overview

Let's look a little more closely at the Pentax K-S1 and Pentax K100D, one being a Advanced DSLR and the other is a Entry-Level DSLR and both of them are offered by Pentax. There exists a huge gap between the sensor resolutions of the K-S1 (20MP) and K100D (6MP) but they use the exact same sensor sizes (APS-C).

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The K-S1 was unveiled 7 years later than the K100D and that is quite a significant gap as far as technology is concerned. Each of the cameras come with different body type with the Pentax K-S1 being a Mid-size SLR camera and the Pentax K100D being a Compact SLR camera.

Before we go in to a full comparison, below is a brief synopsis of how the K-S1 scores versus the K100D with regards to portability, imaging, features and an overall rating.

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Reasons to pick Pentax K-S1 over the Pentax K100D

 K-S1 K100D 
IntroducedAugust 2014December 2006Fresher by 95 months
Display dimension3"2.5"Larger display (+0.5")
Display resolution921k210kCrisper display (+711k dot)

Reasons to pick Pentax K100D over the Pentax K-S1

 K100D K-S1 

Common features in the Pentax K-S1 and Pentax K100D

 K-S1 K100D 
Manual focus Very precise focus
Display typeFixed Fixed Fixed display
Selfie screen Neither contains selfie screen
Touch friendly display Neither contains Touch friendly display

Pentax K-S1 vs Pentax K100D Physical Comparison

For anyone who is intending to carry your camera, you'll need to think about its weight and measurements. The Pentax K-S1 has got external dimensions of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") having a weight of 558 grams (1.23 lbs) while the Pentax K100D has proportions of 129mm x 93mm x 70mm (5.1" x 3.7" x 2.8") with a weight of 660 grams (1.46 lbs).

Compare the Pentax K-S1 and Pentax K100D in the all new Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into consideration, the weight of an Interchangeable Lens Camera will differ depending on the lens you have attached at that time. Below is the front view measurements comparison of the K-S1 and the K100D.

Pentax K-S1 vs Pentax K100D size comparison

Taking into consideration dimensions and weight, the portability grade of the K-S1 and K100D is 69 and 64 respectively.

Pentax K-S1 vs Pentax K100D top view buttons comparison

Pentax K-S1 vs Pentax K100D Sensor Comparison

More often than not, it can be hard to see the difference between sensor sizing simply by going over specs. The photograph underneath may give you a more clear sense of the sensor sizes in the K-S1 and K100D.

As you can plainly see, each of these cameras have got the exact same sensor measurements but not the same MP. You should expect to see the Pentax K-S1 to offer more detail having an extra 14MP. Greater resolution can also enable you to crop images much more aggressively. The fresher K-S1 is going to have a benefit in sensor tech.

Pentax K-S1 vs Pentax K100D sensor size comparison

Pentax K-S1 vs Pentax K100D Screen and ViewFinder

Pentax K-S1 vs Pentax K100D Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Portrait photography with Pentax K-S1
Portrait photography with Pentax K100D
77
manual focus
good MP (20MP)
sensor size is good (APS-C)
offers face detect focusing
delivers RAW formats
51
focusing manually
good sensor size (APS-C)
saves RAW formats
no liveview
low resolution sensor (6MP)
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Street Comparison

Street photography with Pentax K-S1
Street photography with Pentax K100D
73
has image stabilization (Sensor based)
sensor size is good (APS-C)
delivers RAW formats
lighter than others (558 grams)
very good high ISO (51,200)
fixed screen
58
image stabilization (Sensor based)
good sensor size (APS-C)
saves RAW formats
fixed screen
heavier than others (660 grams)
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Sports Comparison

Pentax K-S1 Sports photography details
Pentax K100D Sports photography details
69
great max shutter speed (1/6,000s)
has image stabilization (Sensor based)
good MP (20 megapixels)
sensor size is good (APS-C)
offers tracking focus
sensor has phase detect AF
max frames per second low (5.4 frames/s)
not so great battery life (410 CIPA)
47
image stabilization (Sensor based)
good sensor size (APS-C)
supports phase detect AF
no liveview
low frames per second (3.0 frames/s)
low resolution sensor (6MP)
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Travel Comparison

Travel photography with Pentax K-S1
Travel photography with Pentax K100D
60
lighter than others (558 grams)
good MP (20 megapixels)
has built in flash
lack of Timelapse function
not so great battery life (410 per charge)
display is not selfie friendly
42
flash built-in
missing Time Lapse mode
heavier than others (660 grams)
low resolution sensor (6MP)
doesn't contain selfie friendly screen
Photography Glossary

Landscape Comparison

Landscape photography with Pentax K-S1
Landscape photography with Pentax K100D
73
manual focus
interchangeable lenses (Pentax KAF2 mount)
good sized screen (3")
has image stabilization (Sensor based)
good MP (20 megapixels)
sensor size is good (APS-C)
doesnt have anti-alias filter
very good high ISO (51,200)
delivers RAW formats
not so great battery life (410 CIPA)
lack of Timelapse function
52
focusing manually
change lenses (Pentax KAF mount)
image stabilization (Sensor based)
good sensor size (APS-C)
saves RAW formats
small screen (2.5")
no liveview
low resolution sensor (6 megapixels)
missing Time Lapse mode
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Vlogging Comparison

Pentax K-S1 as a Vlogging camera
Pentax K100D as a Vlogging camera
33
has image stabilization (Sensor based)
offers face detect focusing
good video quality (1920 x 1080 pixels)
lighter than others (558 grams)
display is not selfie friendly
lack of microphone port
9
no video shooting
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Pentax K-S1 vs Pentax K100D Specifications

Detailed spec comparison table for Pentax K-S1 and Pentax K100D
 Pentax K-S1Pentax K100D
General Information
Brand Name Pentax Pentax
Model type Pentax K-S1 Pentax K100D
Type Advanced DSLR Entry-Level DSLR
Introduced 2014-08-27 2006-12-03
Body design Mid-size SLR Compact SLR
Sensor Information
Processor Prime MII -
Sensor type CMOS CCD
Sensor size APS-C APS-C
Sensor dimensions 23.5 x 15.6mm 23.5 x 15.7mm
Sensor surface area 366.6mm² 369.0mm²
Sensor resolution 20 megapixel 6 megapixel
Anti alias filter
Aspect ratio 3:2 3:2
Maximum resolution 5472 x 3648 3008 x 2008
Maximum native ISO 51200 3200
Min native ISO 100 200
RAW data
Autofocusing
Manual focusing
Touch focus
Autofocus continuous
Single autofocus
Tracking autofocus
Selective autofocus
Center weighted autofocus
Multi area autofocus
Autofocus live view
Face detection autofocus
Contract detection autofocus
Phase detection autofocus
Total focus points 11 11
Lens
Lens support Pentax KAF2 Pentax KAF
Available lenses 151 151
Crop factor 1.5 1.5
Screen
Range of screen Fixed Type Fixed Type
Screen size 3 inches 2.5 inches
Screen resolution 921k dot 210k dot
Selfie friendly
Liveview
Touch friendly
Viewfinder Information
Viewfinder Optical (pentaprism) Optical (pentamirror)
Viewfinder coverage 100 percent 96 percent
Viewfinder magnification 0.64x 0.57x
Features
Slowest shutter speed 30 seconds 30 seconds
Maximum shutter speed 1/6000 seconds 1/4000 seconds
Continuous shooting speed 5.4fps 3.0fps
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Set white balance
Image stabilization
Inbuilt flash
Flash distance 10.00 m (at ISO 100) -
Flash options Auto, auto + redeye, on, on + redeye reduction, slow sync, trailing curtain sync, manual Auto, On, Off, Red-eye reduction
Hot shoe
AE bracketing
WB bracketing
Maximum flash sync - 1/180 seconds
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Supported video resolutions 1920 x 1080 (30,25,24 fps), 1280 x 720 (60,50 fps) -
Maximum video resolution 1920x1080 None
Video file format H.264 -
Mic jack
Headphone jack
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 seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 558 gr (1.23 lb) 660 gr (1.46 lb)
Dimensions 121 x 93 x 70mm (4.8" x 3.7" x 2.8") 129 x 93 x 70mm (5.1" x 3.7" x 2.8")
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 photographs -
Battery form Battery Pack -
Battery ID D-LI109 4 x AA
Self timer Yes ( 2 or 12 seconds) Yes (2 or 12 sec)
Time lapse shooting
Storage media SD/SDHC/SDXC SD/MMC card
Storage slots 1 1
Price at launch $339 $0