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Pentax K-S1 vs Pentax RZ18

Portability
69
Imaging
63
Features
70
Overall
65
Pentax K-S1 front
 
Pentax Optio RZ18 front
Portability
92
Imaging
39
Features
37
Overall
38

Pentax K-S1 vs Pentax RZ18 Key Specs

Pentax K-S1
(Full Review)
  • 20MP - APS-C Sensor
  • 3" Fixed Display
  • 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
  • Announced August 2014
  • New Model is Pentax K-S2
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
  • Released September 2011
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Pentax K-S1 vs Pentax RZ18 Overview

Following is a extended review of the Pentax K-S1 versus Pentax RZ18, former is a Advanced DSLR while the latter is a Small Sensor Superzoom and they are both offered by Pentax. There exists a substantial gap among the resolutions of the K-S1 (20MP) and RZ18 (16MP) and the K-S1 (APS-C) and RZ18 (1/2.3") possess totally different sensor sizes.

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The K-S1 was brought out 3 years after the RZ18 which is a fairly big difference as far as camera technology is concerned. Both of the cameras come with different body type with the Pentax K-S1 being a Mid-size SLR camera and the Pentax RZ18 being a Compact camera.

Before delving through a in depth comparison, below is a simple highlight of how the K-S1 matches up vs the RZ18 when it comes to portability, imaging, features and an overall score.

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Reasons to pick Pentax K-S1 over the Pentax RZ18

 K-S1 RZ18 
ReleasedAugust 2014September 2011More modern by 36 months
Screen resolution921k460kClearer screen (+461k dot)

Reasons to pick Pentax RZ18 over the Pentax K-S1

 RZ18 K-S1 

Common features in the Pentax K-S1 and Pentax RZ18

 K-S1 RZ18 
Manually focus Very precise focusing
Screen typeFixed Fixed Fixed screen
Screen dimension3"3"Identical screen dimensions
Selfie screen Missing selfie screen
Touch friendly screen Missing Touch friendly screen

Pentax K-S1 vs Pentax RZ18 Physical Comparison

If you're intending to carry around your camera often, you are going to need to consider its weight and volume. The Pentax K-S1 offers external measurements of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") and a weight of 558 grams (1.23 lbs) whilst the Pentax RZ18 has sizing of 97mm x 61mm x 33mm (3.8" x 2.4" x 1.3") accompanied by a weight of 178 grams (0.39 lbs).

Look at the Pentax K-S1 versus Pentax RZ18 in our newest Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Remember, the weight of an ILC will differ depending on the lens you have chosen at the time. The following is the front view scale comparison of the K-S1 against the RZ18.

Pentax K-S1 vs Pentax RZ18 size comparison

Considering dimensions and weight, the portability grade of the K-S1 and RZ18 is 69 and 92 respectively.

Pentax K-S1 vs Pentax RZ18 top view buttons comparison

Pentax K-S1 vs Pentax RZ18 Sensor Comparison

Quite often, its hard to visualise the difference in sensor sizes just by checking out specs. The picture underneath will provide you a more clear sense of the sensor measurements in the K-S1 and RZ18.

As you can plainly see, both of those cameras have got different megapixels and different sensor sizes. The K-S1 featuring a bigger sensor will make getting bokeh easier and the Pentax K-S1 will show extra detail having its extra 4MP. Higher resolution will also enable you to crop photographs much more aggressively. The more recent K-S1 will have an edge in sensor tech.

Pentax K-S1 vs Pentax RZ18 sensor size comparison

Pentax K-S1 vs Pentax RZ18 Screen and ViewFinder

Pentax K-S1 vs Pentax RZ18 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax K-S1 Portrait photography advice
Pentax RZ18 Portrait photography advice
77
you can focus manually
decent sensor resolution (20MP)
nice sensor size (APS-C)
provides face detect focusing
saves RAW formats
36
manual focus
megapixel count good (16 megapixels)
lack of manual exposure
can't use external flash
very small sensor (1/2.3")
does not have RAW format
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Street Comparison

Street photography with Pentax K-S1
Street photography with Pentax RZ18
73
image stabilization (Sensor based)
nice sensor size (APS-C)
saves RAW formats
lighter than others in class (558g)
good ISO range (51,200)
no articulating screen
65
built in image stabilization (Sensor-shift)
environment sealing
lighter than competitors in class (178g)
no moving screen
very small sensor (1/2.3")
does not have RAW format
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Sports Comparison

Pentax K-S1 as a Sports photography camera
Pentax RZ18 as a Sports photography camera
69
max shutter speed is good (1/6,000s)
image stabilization (Sensor based)
decent sensor resolution (20MP)
nice sensor size (APS-C)
provides tracking focus
comes with phase detect AF
low fps (5.4 frames per second)
terrible battery (410 shots)
47
amazing zoom range (25-450mm 18.0 x zoom)
built in image stabilization (Sensor-shift)
megapixel count good (16MP)
features tracking autofocus
environment sealing
slow frames per second (1.0 frames/s)
lack of shutter priority mode
very small sensor (1/2.3")
does not have phase detect autofocus
Photography Glossary

Travel Comparison

Travel photography with Pentax K-S1
Travel photography with Pentax RZ18
60
lighter than others in class (558g)
decent sensor resolution (20MP)
built-in flash
no Timelapse mode
terrible battery (410 shots)
doesn't have selfie friendly screen
71
lighter than competitors in class (178 grams)
environment sealing
megapixel count good (16 megapixels)
has built in flash
fairly wide (25mm)
great reach (450mm)
missing Time Lapse function
display is not selfie friendly
slow max aperture (f3.5)
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Landscape Comparison

Pentax K-S1 Landscape photography details
Pentax RZ18 Landscape photography details
73
you can focus manually
swap lenses (Pentax KAF2 mount)
screen size is decent (3 inches)
image stabilization (Sensor based)
decent sensor resolution (20 megapixels)
nice sensor size (APS-C)
doesnt have anti aliasing filter
good ISO range (51,200)
saves RAW formats
terrible battery (410 shots)
no Timelapse mode
49
manual focus
fairly wide (25mm)
screen is a good size (3")
built in image stabilization (Sensor-shift)
megapixel count good (16MP)
environment sealing
fixed lens (fixed lens mount)
slow max aperture (f3.5)
lack of manual exposure
very small sensor (1/2.3")
does not have RAW format
missing Time Lapse function
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Vlogging Comparison

Pentax K-S1 as a Vlogging camera
Pentax RZ18 as a Vlogging camera
33
image stabilization (Sensor based)
provides face detect focusing
video res high (1920 x 1080 pixels)
lighter than others in class (558 grams)
doesn't have selfie friendly screen
no microphone jack
30
fairly wide (25mm)
built in image stabilization (Sensor-shift)
lighter than competitors in class (178 grams)
slow max aperture (f3.5)
display is not selfie friendly
low video resolution (1280 x 720 resolution)
missing external mic support
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Pentax K-S1 vs Pentax RZ18 Specifications

Detailed spec comparison table for Pentax K-S1 and Pentax RZ18
 Pentax K-S1Pentax Optio RZ18
General Information
Make Pentax Pentax
Model type Pentax K-S1 Pentax Optio RZ18
Category Advanced DSLR Small Sensor Superzoom
Announced 2014-08-27 2011-09-12
Physical type Mid-size SLR Compact
Sensor Information
Powered by Prime MII -
Sensor type CMOS CCD
Sensor size APS-C 1/2.3"
Sensor dimensions 23.5 x 15.6mm 6.08 x 4.56mm
Sensor surface area 366.6mm² 27.7mm²
Sensor resolution 20 megapixels 16 megapixels
Anti alias filter
Aspect ratio 3:2 1:1, 4:3 and 16:9
Highest resolution 5472 x 3648 4608 x 3456
Highest native ISO 51200 6400
Lowest native ISO 100 80
RAW pictures
Autofocusing
Manual focusing
Autofocus touch
Continuous autofocus
Autofocus single
Autofocus tracking
Selective autofocus
Center weighted autofocus
Autofocus multi area
Autofocus live view
Face detect autofocus
Contract detect autofocus
Phase detect autofocus
Total focus points 11 9
Lens
Lens mount type Pentax KAF2 fixed lens
Lens zoom range - 25-450mm (18.0x)
Maximal aperture - f/3.5-5.9
Macro focusing distance - 4cm
Number of lenses 151 -
Focal length multiplier 1.5 5.9
Screen
Type of display Fixed Type Fixed Type
Display size 3" 3"
Resolution of display 921 thousand dots 460 thousand dots
Selfie friendly
Liveview
Touch screen
Display technology - TFT color LCD with Anti-reflective coating
Viewfinder Information
Viewfinder type Optical (pentaprism) None
Viewfinder coverage 100% -
Viewfinder magnification 0.64x -
Features
Lowest shutter speed 30s 4s
Highest shutter speed 1/6000s 1/2000s
Continuous shooting rate 5.4 frames per sec 1.0 frames per sec
Shutter priority
Aperture priority
Expose Manually
Exposure compensation Yes -
Custom white balance
Image stabilization
Integrated flash
Flash distance 10.00 m (at ISO 100) 2.80 m
Flash options Auto, auto + redeye, on, on + redeye reduction, slow sync, trailing curtain sync, manual Auto, On, Off, Red-eye, Soft
Hot shoe
AE bracketing
White balance bracketing
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) 1280 x 720 (30, 15 fps), 640 x 480 (30, 15 fps), 320 x 240 (30, 15 fps)
Highest video resolution 1920x1080 1280x720
Video format H.264 Motion JPEG
Mic support
Headphone support
Connectivity
Wireless Eye-Fi Connected Eye-Fi Connected
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS Optional None
Physical
Environmental sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 558 gr (1.23 lbs) 178 gr (0.39 lbs)
Dimensions 121 x 93 x 70mm (4.8" x 3.7" x 2.8") 97 x 61 x 33mm (3.8" x 2.4" x 1.3")
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 images -
Style of battery Battery Pack -
Battery ID D-LI109 D-LI92
Self timer Yes ( 2 or 12 seconds) Yes (2 or 10 sec)
Time lapse recording
Storage type SD/SDHC/SDXC SD/SDHC/SDXC, Internal
Card slots 1 1
Price at launch $339 $210