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Pentax K100D S vs Sony RX10 III

Portability
65
Imaging
44
Features
38
Overall
41
Pentax K100D Super front
 
Sony Cyber-shot DSC-RX10 III front
Portability
53
Imaging
51
Features
77
Overall
61

Pentax K100D S vs Sony RX10 III Key Specs

Pentax K100D S
(Full Review)
  • 6MP - APS-C Sensor
  • 2.5" Fixed Display
  • ISO 200 - 3200
  • Sensor based Image Stabilization
  • No Video
  • Pentax KAF2 Mount
  • 646g - 129 x 91 x 71mm
  • Announced June 2007
  • Old Model is Pentax K100D
  • New Model is Pentax K200D
Sony RX10 III
(Full Review)
  • 20MP - 1" Sensor
  • 3" Tilting Screen
  • ISO 125 - 12800 (Increase to 25600)
  • Optical Image Stabilization
  • 3840 x 2160 video
  • 24-600mm (F2.4-4.0) lens
  • 1051g - 133 x 94 x 127mm
  • Launched March 2016
  • Earlier Model is Sony RX10 II
  • Replacement is Sony RX10 IV
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Pentax K100D S vs Sony RX10 III Overview

Its time to look much closer at the Pentax K100D S vs Sony RX10 III, former being a Entry-Level DSLR while the latter is a Large Sensor Superzoom by rivals Pentax and Sony. There exists a noticeable gap among the sensor resolutions of the K100D S (6MP) and RX10 III (20MP) and the K100D S (APS-C) and RX10 III (1") posses totally different sensor sizing.

Photography Glossary

The K100D S was manufactured 9 years before the RX10 III and that is a fairly sizable difference as far as camera technology is concerned. Each of these cameras feature different body design with the Pentax K100D S being a Compact SLR camera and the Sony RX10 III being a SLR-like (bridge) camera.

Before diving straight to a full comparison, here is a short introduction of how the K100D S matches up against the RX10 III in regards to portability, imaging, features and an overall grade.

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Reasons to pick Pentax K100D S over the Sony RX10 III

 K100D S RX10 III 

Reasons to pick Sony RX10 III over the Pentax K100D S

 RX10 III K100D S 
LaunchedMarch 2016June 2007More recent by 106 months
Screen typeTiltingFixed Tilting screen
Screen size3"2.5"Bigger screen (+0.5")
Screen resolution1229k210kClearer screen (+1019k dot)

Common features in the Pentax K100D S and Sony RX10 III

 K100D S RX10 III 
Focus manually More accurate focusing
Selfie screen No selfie screen
Touch screen Neither has Touch screen

Pentax K100D S vs Sony RX10 III Physical Comparison

For those who are aiming to lug around your camera regularly, you're going to have to factor its weight and proportions. The Pentax K100D S has physical dimensions of 129mm x 91mm x 71mm (5.1" x 3.6" x 2.8") with a weight of 646 grams (1.42 lbs) and the Sony RX10 III has measurements of 133mm x 94mm x 127mm (5.2" x 3.7" x 5.0") accompanied by a weight of 1051 grams (2.32 lbs).

Look at the Pentax K100D S vs Sony RX10 III in our completely new Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Bear in mind, the weight of an ILC will vary depending on the lens you are using at that time. Following is a front view dimension comparison of the K100D S and the RX10 III.

Pentax K100D S vs Sony RX10 III size comparison

Looking at dimensions and weight, the portability rating of the K100D S and RX10 III is 65 and 53 respectively.

Pentax K100D S vs Sony RX10 III top view buttons comparison

Pentax K100D S vs Sony RX10 III Sensor Comparison

Sometimes, it is very difficult to visualise the difference in sensor measurements merely by going through specifications. The graphic underneath will offer you a far better sense of the sensor sizes in the K100D S and RX10 III.

Plainly, the 2 cameras feature different megapixels and different sensor measurements. The K100D S due to its bigger sensor will make achieving shallower DOF easier and the Sony RX10 III will produce extra detail due to its extra 14MP. Higher resolution will allow you to crop pictures way more aggressively. The older K100D S will be disadvantaged with regard to sensor tech.

Pentax K100D S vs Sony RX10 III sensor size comparison

Pentax K100D S vs Sony RX10 III Screen and ViewFinder

Pentax K100D S vs Sony RX10 III Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K100D S Portrait photography factors
Sony RX10 III Portrait photography factors
50
you can focus manually
nice sensor size (APS-C)
saves RAW files
no liveview feature
low resolution (6MP)
70
focusing manually
MP count good (20MP)
nice sensor size (1")
features face detection focus
exports RAW files
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Street Comparison

Pentax K100D S Street photography factors
Sony RX10 III Street photography factors
64
image stabilization (Sensor based)
nice sensor size (APS-C)
saves RAW files
screen does not articulate
63
has a tilting screen
has image stabilization (Optical)
nice sensor size (1")
exports RAW files
weather proof
more heavy than competitors in class (1,051 grams)
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Sports Comparison

Pentax K100D S as a Sports photography camera
Sony RX10 III as a Sports photography camera
47
image stabilization (Sensor based)
nice sensor size (APS-C)
comes with phase detect AF
no liveview feature
very slow continuous shooting (3.0 frames/s)
low resolution (6MP)
69
incredible zoom range (24-600mm 25.0 x zoom)
quiet shutter (1/32,000s)
has image stabilization (Optical)
MP count good (20MP)
nice sensor size (1")
features tracking autofocus
weather proof
good battery power (420 shots)
lack of phase detect auto focus
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Travel Comparison

Pentax K100D S Travel photography factors
Sony RX10 III Travel photography factors
44
flash built-in
no Time Lapse recording
low resolution (6MP)
display isn't selfie friendly
55
good battery power (420 CIPA)
weather proof
MP count good (20 megapixels)
flash built-in
quite wide (24mm)
very long zoom (600mm)
does not have Timelapse function
more heavy than competitors in class (1,051g)
doesn't offer selfie friendly display
somewhat slow maximum aperture (f2.4)
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Landscape Comparison

Pentax K100D S Landscape photography information
Sony RX10 III Landscape photography information
51
you can focus manually
interchangeable lenses (Pentax KAF2 mount)
image stabilization (Sensor based)
nice sensor size (APS-C)
saves RAW files
screen is small (2.5 inches)
no liveview feature
low resolution (6MP)
no Time Lapse recording
63
focusing manually
quite wide (24mm)
screen is a good size (3 inches)
has image stabilization (Optical)
MP count good (20 megapixels)
nice sensor size (1")
exports RAW files
weather proof
good battery power (420 per charge)
lens is fixed (fixed lens mount)
somewhat slow maximum aperture (f2.4)
does not have Timelapse function
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Vlogging Comparison

Vlogging with Pentax K100D S
Vlogging with Sony RX10 III
9
no video shooting
28
quite wide (24mm)
has image stabilization (Optical)
features face detection focus
video resolution high (3840 x 2160 pixels)
does have external microphone support
somewhat slow maximum aperture (f2.4)
doesn't offer selfie friendly display
more heavy than competitors in class (1,051 grams)
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Pentax K100D S vs Sony RX10 III Specifications

Detailed spec comparison table for Pentax K100D S and Sony RX10 III
 Pentax K100D SuperSony Cyber-shot DSC-RX10 III
General Information
Manufacturer Pentax Sony
Model Pentax K100D Super Sony Cyber-shot DSC-RX10 III
Type Entry-Level DSLR Large Sensor Superzoom
Announced 2007-06-28 2016-03-29
Physical type Compact SLR SLR-like (bridge)
Sensor Information
Powered by - Bionz X
Sensor type CCD BSI-CMOS
Sensor size APS-C 1"
Sensor measurements 23.5 x 15.7mm 13.2 x 8.8mm
Sensor surface area 369.0mm² 116.2mm²
Sensor resolution 6 megapixels 20 megapixels
Anti aliasing filter
Aspect ratio 3:2 1:1, 4:3, 3:2 and 16:9
Full resolution 3008 x 2008 5472 x 3648
Max native ISO 3200 12800
Max boosted ISO - 25600
Minimum native ISO 200 125
RAW files
Minimum boosted ISO - 64
Autofocusing
Focus manually
AF touch
AF continuous
AF single
Tracking AF
AF selectice
AF center weighted
Multi area AF
Live view AF
Face detect AF
Contract detect AF
Phase detect AF
Number of focus points 11 25
Lens
Lens mounting type Pentax KAF2 fixed lens
Lens focal range - 24-600mm (25.0x)
Max aperture - f/2.4-4.0
Macro focus distance - 3cm
Number of lenses 151 -
Crop factor 1.5 2.7
Screen
Display type Fixed Type Tilting
Display diagonal 2.5" 3"
Resolution of display 210 thousand dots 1,229 thousand dots
Selfie friendly
Liveview
Touch friendly
Viewfinder Information
Viewfinder type Optical (pentamirror) Electronic
Viewfinder resolution - 2,359 thousand dots
Viewfinder coverage 96% 100%
Viewfinder magnification 0.57x 0.7x
Features
Lowest shutter speed 30s 30s
Highest shutter speed 1/4000s 1/2000s
Highest quiet shutter speed - 1/32000s
Continuous shooting rate 3.0fps 14.0fps
Shutter priority
Aperture priority
Manual mode
Exposure compensation Yes Yes
Custom WB
Image stabilization
Integrated flash
Flash range - 10.80 m (at Auto ISO)
Flash modes Auto, On, Off, Red-eye reduction Auto, fill-flash, slow sync, rear sync, off
Hot shoe
AE bracketing
WB bracketing
Highest flash synchronize 1/180s -
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Video resolutions - 3840 x 2160 (30p, 25p, 24p), 1920 x 1080 (60p, 60i, 24p) ,1440 x 1080 (30p), 640 x 480 (30p)
Max video resolution None 3840x2160
Video data format - MPEG-4, AVCHD, XAVC S
Microphone support
Headphone support
Connectivity
Wireless None Built-In
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environment sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 646 gr (1.42 pounds) 1051 gr (2.32 pounds)
Physical dimensions 129 x 91 x 71mm (5.1" x 3.6" x 2.8") 133 x 94 x 127mm (5.2" x 3.7" x 5.0")
DXO scores
DXO All around score not tested 70
DXO Color Depth score not tested 23.1
DXO Dynamic range score not tested 12.6
DXO Low light score not tested 472
Other
Battery life - 420 photos
Type of battery - Battery Pack
Battery model 4 x AA NP-FW50
Self timer Yes (2 or 12 sec) Yes (2 or 10 sec, continuous)
Time lapse recording
Type of storage SD/SDHC card SD/SDHC/SDXC, Memory Stick Duo/Pro Duo/Pro-HG Duo
Card slots Single Single
Price at launch $520 $1,398