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Pentax K100D S vs Pentax K20D

Portability
65
Imaging
45
Features
38
Overall
42
Pentax K100D Super front
 
Pentax K20D front
Portability
59
Imaging
53
Features
52
Overall
52

Pentax K100D S vs Pentax K20D Key Specs

Pentax K100D S
(Full Review)
  • 6MP - APS-C Sensor
  • 2.5" Fixed Screen
  • ISO 200 - 3200
  • Sensor based Image Stabilization
  • No Video
  • Pentax KAF2 Mount
  • 646g - 129 x 91 x 71mm
  • Launched June 2007
  • Old Model is Pentax K100D
  • Successor is Pentax K200D
Pentax K20D
(Full Review)
  • 15MP - APS-C Sensor
  • 2.7" Fixed Screen
  • ISO 100 - 3200 (Increase to 6400)
  • Sensor based Image Stabilization
  • No Video
  • Pentax KAF2 Mount
  • 800g - 142 x 101 x 70mm
  • Launched June 2008
  • Older Model is Pentax K10D
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Pentax K100D S vs Pentax K20D Overview

Here is a detailed review of the Pentax K100D S vs Pentax K20D, one being a Entry-Level DSLR and the latter is a Advanced DSLR and both of them are created by Pentax. There exists a sizeable gap among the resolutions of the K100D S (6MP) and K20D (15MP) but they feature the same exact sensor dimensions (APS-C).

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The K100D S was revealed 12 months prior to the K20D which means that they are both of a similar generation. Each of the cameras offer different body type with the Pentax K100D S being a Compact SLR camera and the Pentax K20D being a Mid-size SLR camera.

Before getting straight into a complete comparison, below is a short introduction of how the K100D S grades against the K20D with regards to portability, imaging, features and an overall rating.

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Reasons to pick Pentax K100D S over the Pentax K20D

 K100D S K20D 

Reasons to pick Pentax K20D over the Pentax K100D S

 K20D K100D S 
LaunchedJune 2008June 2007Fresher by 12 months
Screen sizing2.7"2.5"Bigger screen (+0.2")
Screen resolution230k210kSharper screen (+20k dot)

Common features in the Pentax K100D S and Pentax K20D

 K100D S K20D 
Manually focus More exact focus
Screen typeFixed Fixed Fixed screen
Selfie screen No selfie screen
Touch friendly screen No Touch friendly screen

Pentax K100D S vs Pentax K20D Physical Comparison

When you are intending to carry your camera often, you will have to factor its weight and proportions. The Pentax K100D S features external dimensions of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") having a weight of 646 grams (1.42 lbs) and the Pentax K20D has measurements of 142mm x 101mm x 70mm (5.6" x 4.0" x 2.8") along with a weight of 800 grams (1.76 lbs).

Contrast the Pentax K100D S vs Pentax K20D in the all new Camera with Lens Size Comparison Tool. Camera Size Comparison with Lenses

Bear in mind, the weight of an Interchangeable Lens Camera will vary based on the lens you are employing during that time. Here is the front view dimension comparison of the K100D S against the K20D.

Pentax K100D S vs Pentax K20D size comparison

Looking at dimensions and weight, the portability rating of the K100D S and K20D is 65 and 59 respectively.

Pentax K100D S vs Pentax K20D top view buttons comparison

Pentax K100D S vs Pentax K20D Sensor Comparison

Normally, its hard to visualize the gap in sensor sizing purely by researching a spec sheet. The visual below will help offer you a more clear sense of the sensor dimensions in the K100D S and K20D.

As you can see, both the cameras enjoy the same exact sensor sizing albeit different megapixels. You should expect the Pentax K20D to result in more detail because of its extra 9 Megapixels. Higher resolution can also let you crop photographs far more aggressively. The older K100D S will be disadvantaged when it comes to sensor technology.

Pentax K100D S vs Pentax K20D sensor size comparison

Pentax K100D S vs Pentax K20D Screen and ViewFinder

Pentax K100D S vs Pentax K20D Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K100D S as a Portrait photography camera
Pentax K20D as a Portrait photography camera
51
has manual focus
decent sensor size (APS-C)
delivers RAW formats
does not have liveview
sensor resolution not great (6MP)
71
manual focus
decent megapixels (15 megapixels)
sensor size is decent (APS-C)
saves RAW files
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Street Comparison

Pentax K100D S Street photography advice
Pentax K20D Street photography advice
64
built in image stabilization (Sensor based)
decent sensor size (APS-C)
delivers RAW formats
no articulating screen
65
built in image stabilization (Sensor based)
sensor size is decent (APS-C)
saves RAW files
weather proof
no articulating screen
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Sports Comparison

Pentax K100D S Sports photography factors
Pentax K20D Sports photography factors
47
built in image stabilization (Sensor based)
decent sensor size (APS-C)
supports phase detect AF
does not have liveview
painfully slow continuous shooting (3.0 frames per second)
sensor resolution not great (6MP)
68
built in image stabilization (Sensor based)
decent megapixels (15MP)
sensor size is decent (APS-C)
weather proof
supports phase detect auto focus
continuous shooting slow (3.0 frames/s)
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Travel Comparison

Pentax K100D S as a Travel photography camera
Pentax K20D as a Travel photography camera
45
built-in flash
doesn't have Timelapse function
sensor resolution not great (6MP)
does not have selfie friendly screen
64
weather proof
decent megapixels (15 megapixels)
has built in flash
screen isn't selfie friendly
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Landscape Comparison

Pentax K100D S as a Landscape photography camera
Pentax K20D as a Landscape photography camera
52
has manual focus
change lenses (Pentax KAF2 mount)
built in image stabilization (Sensor based)
decent sensor size (APS-C)
delivers RAW formats
screen is small (2.5 inches)
does not have liveview
sensor resolution not great (6 megapixels)
doesn't have Timelapse function
70
manual focus
swap lenses (Pentax KAF2 mount)
built in image stabilization (Sensor based)
decent megapixels (15 megapixels)
sensor size is decent (APS-C)
saves RAW files
weather proof
screen is small (2.7")
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Vlogging Comparison

Vlogging with Pentax K100D S
Vlogging with Pentax K20D
9
can't record video
9
no video
Photography Glossary

Pentax K100D S vs Pentax K20D Specifications

Detailed spec comparison table for Pentax K100D S and Pentax K20D
 Pentax K100D SuperPentax K20D
General Information
Brand Name Pentax Pentax
Model Pentax K100D Super Pentax K20D
Category Entry-Level DSLR Advanced DSLR
Launched 2007-06-28 2008-06-25
Body design Compact SLR Mid-size SLR
Sensor Information
Sensor type CCD CMOS
Sensor size APS-C APS-C
Sensor measurements 23.5 x 15.7mm 23.4 x 15.6mm
Sensor area 369.0mm² 365.0mm²
Sensor resolution 6 megapixels 15 megapixels
Anti aliasing filter
Aspect ratio 3:2 3:2
Full resolution 3008 x 2008 4672 x 3104
Max native ISO 3200 3200
Max boosted ISO - 6400
Min native ISO 200 100
RAW data
Autofocusing
Manual focus
Touch focus
Autofocus continuous
Autofocus single
Tracking autofocus
Selective autofocus
Center weighted autofocus
Multi area autofocus
Autofocus live view
Face detection focus
Contract detection focus
Phase detection focus
Number of focus points 11 11
Lens
Lens mounting type Pentax KAF2 Pentax KAF2
Total lenses 151 151
Crop factor 1.5 1.5
Screen
Range of screen Fixed Type Fixed Type
Screen sizing 2.5 inch 2.7 inch
Resolution of screen 210k dot 230k dot
Selfie friendly
Liveview
Touch function
Viewfinder Information
Viewfinder Optical (pentamirror) Optical (pentaprism)
Viewfinder coverage 96 percent 95 percent
Viewfinder magnification 0.57x 0.64x
Features
Slowest shutter speed 30 seconds 30 seconds
Maximum shutter speed 1/4000 seconds 1/4000 seconds
Continuous shooting speed 3.0 frames per sec 3.0 frames per sec
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes Yes
Change white balance
Image stabilization
Integrated flash
Flash range - 13.00 m (at ISO 100)
Flash settings Auto, On, Off, Red-eye reduction Auto, Red-Eye, Slow, Red-Eye Slow, Rear curtain, wireless
External flash
AE bracketing
White balance bracketing
Maximum flash sync 1/180 seconds 1/180 seconds
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Max video resolution None None
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 None
Physical
Environment seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 646 grams (1.42 pounds) 800 grams (1.76 pounds)
Dimensions 129 x 91 x 71mm (5.1" x 3.6" x 2.8") 142 x 101 x 70mm (5.6" x 4.0" x 2.8")
DXO scores
DXO All around score not tested 65
DXO Color Depth score not tested 22.9
DXO Dynamic range score not tested 11.1
DXO Low light score not tested 639
Other
Battery model 4 x AA D-LI50
Self timer Yes (2 or 12 sec) Yes (2 or 10 sec)
Time lapse recording
Storage media SD/SDHC card SD/MMC/SDHC card
Storage slots One One
Launch pricing $520 $700