Clicky

Pentax K100D vs Pentax RZ18

Portability
64
Imaging
45
Features
36
Overall
41
Pentax K100D front
 
Pentax Optio RZ18 front
Portability
92
Imaging
39
Features
37
Overall
38

Pentax K100D vs Pentax RZ18 Key Specs

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
  • Revealed December 2006
  • Successor is Pentax K100D S
Pentax RZ18
(Full Review)
  • 16MP - 1/2.3" Sensor
  • 3" Fixed Screen
  • ISO 80 - 6400
  • Sensor-shift Image Stabilization
  • 1280 x 720 video
  • 25-450mm (F3.5-5.9) lens
  • 178g - 97 x 61 x 33mm
  • Launched September 2011
Fujifilm accuses Eastman Kodak of patent violation in new lawsuit

Pentax K100D vs Pentax RZ18 Overview

Here is a comprehensive review of the Pentax K100D versus Pentax RZ18, one being a Entry-Level DSLR and the latter is a Small Sensor Superzoom and they are both produced by Pentax. There exists a big gap between the sensor resolutions of the K100D (6MP) and RZ18 (16MP) and the K100D (APS-C) and RZ18 (1/2.3") use different sensor size.

Europe Approves Revolutionary AI Legislation

The K100D was introduced 5 years earlier than the RZ18 and that is quite a big gap as far as technology is concerned. The two cameras come with different body type with the Pentax K100D being a Compact SLR camera and the Pentax RZ18 being a Compact camera.

Before going through a thorough comparison, below is a concise summation of how the K100D grades against the RZ18 with respect to portability, imaging, features and an overall rating.

TikTok Developing Photo App to Challenge Instagram's Dominance
	
	

Reasons to pick Pentax K100D over the Pentax RZ18

 K100D RZ18 

Reasons to pick Pentax RZ18 over the Pentax K100D

 RZ18 K100D 
LaunchedSeptember 2011December 2006Fresher by 58 months
Screen dimension3"2.5"Bigger screen (+0.5")
Screen resolution460k210kClearer screen (+250k dot)

Common features in the Pentax K100D and Pentax RZ18

 K100D RZ18 
Manual focus Dial accurate focus
Screen typeFixed Fixed Fixed screen
Selfie screen Neither offers selfie screen
Touch screen Neither offers Touch screen

Pentax K100D vs Pentax RZ18 Physical Comparison

If you are looking to carry your camera regularly, you should think about its weight and proportions. The Pentax K100D offers outside dimensions of 129mm x 93mm x 70mm (5.1" x 3.7" x 2.8") along with a weight of 660 grams (1.46 lbs) while the Pentax RZ18 has measurements of 97mm x 61mm x 33mm (3.8" x 2.4" x 1.3") having a weight of 178 grams (0.39 lbs).

See the Pentax K100D versus Pentax RZ18 in the latest Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Keep in mind, the weight of an Interchangeable Lens Camera will change based on the lens you use at that time. Underneath is the front view dimension comparison of the K100D compared to the RZ18.

Pentax K100D vs Pentax RZ18 size comparison

Looking at dimensions and weight, the portability score of the K100D and RZ18 is 64 and 92 respectively.

Pentax K100D vs Pentax RZ18 top view buttons comparison

Pentax K100D vs Pentax RZ18 Sensor Comparison

Normally, it's difficult to imagine the contrast between sensor sizing only by looking at technical specs. The graphic here might offer you a stronger sense of the sensor sizes in the K100D and RZ18.

As you have seen, the 2 cameras have got different megapixel count and different sensor sizing. The K100D having a bigger sensor is going to make achieving shallow depth of field simpler and the Pentax RZ18 will resolve extra detail using its extra 10MP. Higher resolution will also make it easier to crop pictures much more aggressively. The older K100D is going to be behind in sensor innovation.

Pentax K100D vs Pentax RZ18 sensor size comparison

Pentax K100D vs Pentax RZ18 Screen and ViewFinder

Pentax K100D vs Pentax RZ18 Screen and Viewfinder comparison
Leica struggles with L-Mount camera sales, tougher than Q or M

Photography Type Scores

Portrait Comparison

Pentax K100D Portrait photography info
Pentax RZ18 Portrait photography info
51
has manual focus
sensor size is decent (APS-C)
saves RAW files
no liveview feature
low resolution (6MP)
36
has manual focus
good MP (16 megapixels)
no manual control
no external flash support
small sensor (1/2.3")
doesn't have RAW files
Peek Behind the Lens of 'Photographer' and Their Go-To Cameras

Street Comparison

Pentax K100D as a Street photography camera
Pentax RZ18 as a Street photography camera
58
has image stabilization (Sensor based)
sensor size is decent (APS-C)
saves RAW files
screen does not articulate
heavier than average (660g)
65
built in image stabilization (Sensor-shift)
environment proof
lighter than others in class (178g)
fixed screen
small sensor (1/2.3")
doesn't have RAW files
Ulanzi's Tripod Ensures Ultra Smooth Filming

Sports Comparison

Sports photography with Pentax K100D
Sports photography with Pentax RZ18
47
has image stabilization (Sensor based)
sensor size is decent (APS-C)
has phase detect AF
no liveview feature
continuous shooting slow (3.0 frames per second)
low resolution (6 megapixels)
47
excellent zoom range (25-450mm 18.0 x zoom)
built in image stabilization (Sensor-shift)
good MP (16MP)
supports tracking focus
environment proof
max fps low (1.0 fps)
lack of shutter priority mode
small sensor (1/2.3")
doesn't have phase detect AF
Apple patent reveals improved iPhone camera durability

Travel Comparison

Pentax K100D Travel photography advice
Pentax RZ18 Travel photography advice
42
has built in flash
doesn't have Time Lapse function
heavier than average (660g)
low resolution (6 megapixels)
doesn't offer selfie friendly display
71
lighter than others in class (178g)
environment proof
good MP (16MP)
has built in flash
relatively wide (25mm)
very long zoom (450mm)
does not have Timelapse mode
does not posses selfie friendly display
slow maximum aperture (f3.5)
AI-Powered Photo Editing Tools Could Be Added to WhatsApp

Landscape Comparison

Pentax K100D Landscape photography info
Pentax RZ18 Landscape photography info
52
has manual focus
interchangeable lenses (Pentax KAF mount)
has image stabilization (Sensor based)
sensor size is decent (APS-C)
saves RAW files
screen is somewhat small (2.5")
no liveview feature
low resolution (6MP)
doesn't have Time Lapse function
49
has manual focus
relatively wide (25mm)
screen is a good size (3 inches)
built in image stabilization (Sensor-shift)
good MP (16MP)
environment proof
lens is fixed (fixed lens mount)
slow maximum aperture (f3.5)
no manual control
small sensor (1/2.3")
doesn't have RAW files
does not have Timelapse mode
Nikon Coolpix camera search on Google skyrockets by 8,500%

Vlogging Comparison

Pentax K100D as a Vlogging camera
Pentax RZ18 as a Vlogging camera
9
can't record video
30
relatively wide (25mm)
built in image stabilization (Sensor-shift)
lighter than others in class (178 grams)
slow maximum aperture (f3.5)
does not posses selfie friendly display
video resolution low (1280 x 720 resolution)
does not have microphone support
Google AI Gemini Could Enhance iPhone Experience, Talks Suggest

Pentax K100D vs Pentax RZ18 Specifications

Detailed spec comparison table for Pentax K100D and Pentax RZ18
 Pentax K100DPentax Optio RZ18
General Information
Brand Pentax Pentax
Model Pentax K100D Pentax Optio RZ18
Type Entry-Level DSLR Small Sensor Superzoom
Revealed 2006-12-03 2011-09-12
Physical type Compact SLR Compact
Sensor Information
Sensor type CCD CCD
Sensor size APS-C 1/2.3"
Sensor measurements 23.5 x 15.7mm 6.08 x 4.56mm
Sensor area 369.0mm² 27.7mm²
Sensor resolution 6 megapixels 16 megapixels
Anti aliasing filter
Aspect ratio 3:2 1:1, 4:3 and 16:9
Peak resolution 3008 x 2008 4608 x 3456
Highest native ISO 3200 6400
Minimum native ISO 200 80
RAW images
Autofocusing
Manual focus
AF touch
AF continuous
Single AF
AF tracking
Selective AF
Center weighted AF
Multi area AF
AF live view
Face detect focusing
Contract detect focusing
Phase detect focusing
Number of focus points 11 9
Lens
Lens mount Pentax KAF fixed lens
Lens focal range - 25-450mm (18.0x)
Highest aperture - f/3.5-5.9
Macro focus distance - 4cm
Total lenses 151 -
Focal length multiplier 1.5 5.9
Screen
Display type Fixed Type Fixed Type
Display diagonal 2.5 inches 3 inches
Display resolution 210k dots 460k dots
Selfie friendly
Liveview
Touch capability
Display tech - TFT color LCD with Anti-reflective coating
Viewfinder Information
Viewfinder type Optical (pentamirror) None
Viewfinder coverage 96 percent -
Viewfinder magnification 0.57x -
Features
Minimum shutter speed 30s 4s
Fastest shutter speed 1/4000s 1/2000s
Continuous shutter rate 3.0 frames per second 1.0 frames per second
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes -
Change WB
Image stabilization
Integrated flash
Flash range - 2.80 m
Flash options Auto, On, Off, Red-eye reduction Auto, On, Off, Red-eye, Soft
Hot shoe
AEB
WB bracketing
Fastest flash synchronize 1/180s -
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions - 1280 x 720 (30, 15 fps), 640 x 480 (30, 15 fps), 320 x 240 (30, 15 fps)
Highest video resolution None 1280x720
Video format - Motion JPEG
Microphone support
Headphone support
Connectivity
Wireless None Eye-Fi Connected
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environmental sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 660 gr (1.46 pounds) 178 gr (0.39 pounds)
Dimensions 129 x 93 x 70mm (5.1" x 3.7" x 2.8") 97 x 61 x 33mm (3.8" x 2.4" x 1.3")
DXO scores
DXO Overall score not tested not tested
DXO Color Depth score not tested not tested
DXO Dynamic range score not tested not tested
DXO Low light score not tested not tested
Other
Battery model 4 x AA D-LI92
Self timer Yes (2 or 12 sec) Yes (2 or 10 sec)
Time lapse feature
Type of storage SD/MMC card SD/SDHC/SDXC, Internal
Card slots 1 1
Retail cost $0 $210