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Pentax K-x vs Pentax S1

Portability
69
Imaging
52
Features
47
Overall
50
Pentax K-x front
 
Pentax Optio S1 front
Portability
93
Imaging
37
Features
31
Overall
34

Pentax K-x vs Pentax S1 Key Specs

Pentax K-x
(Full Review)
  • 12MP - APS-C Sensor
  • 2.7" Fixed Display
  • ISO 100 - 6400 (Raise to 12800)
  • Sensor based Image Stabilization
  • 1/6000s Max Shutter
  • 1280 x 720 video
  • Pentax KAF2 Mount
  • 580g - 123 x 92 x 68mm
  • Released December 2009
Pentax S1
(Full Review)
  • 14MP - 1/2.3" Sensor
  • 2.7" Fixed Display
  • ISO 80 - 6400
  • Sensor-shift Image Stabilization
  • 1280 x 720 video
  • 28-140mm (F3.5-5.5) lens
  • 157g - 114 x 58 x 28mm
  • Announced March 2011
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Pentax K-x vs Pentax S1 Overview

In this write-up, we are evaluating the Pentax K-x versus Pentax S1, one is a Entry-Level DSLR and the other is a Small Sensor Compact and they are both sold by Pentax. The sensor resolution of the K-x (12MP) and the S1 (14MP) is very similar but the K-x (APS-C) and S1 (1/2.3") enjoy different sensor measurements.

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The K-x was brought out 14 months earlier than the S1 making the cameras a generation away from one another. Both of the cameras offer different body type with the Pentax K-x being a Compact SLR camera and the Pentax S1 being a Compact camera.

Before we go through a full comparison, below is a short synopsis of how the K-x grades versus the S1 in terms of portability, imaging, features and an overall mark.

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Reasons to pick Pentax K-x over the Pentax S1

 K-x S1 

Reasons to pick Pentax S1 over the Pentax K-x

 S1 K-x 
AnnouncedMarch 2011December 2009Newer by 14 months

Common features in the Pentax K-x and Pentax S1

 K-x S1 
Focus manually Dial precise focusing
Display typeFixed Fixed Fixed display
Display sizing2.7"2.7"Equivalent display measurements
Display resolution230k230kIdentical display resolution
Selfie screen Missing selfie screen
Touch display Missing Touch display

Pentax K-x vs Pentax S1 Physical Comparison

When you are looking to travel with your camera, you'll need to take into account its weight and dimensions. The Pentax K-x provides outer dimensions of 123mm x 92mm x 68mm (4.8" x 3.6" x 2.7") having a weight of 580 grams (1.28 lbs) while the Pentax S1 has dimensions of 114mm x 58mm x 28mm (4.5" x 2.3" x 1.1") with a weight of 157 grams (0.35 lbs).

Contrast the Pentax K-x versus Pentax S1 in the latest Camera and Lens Size Comparison Tool. Camera Size Comparison with Lenses

Remember that, the weight of an Interchangeable Lens Camera will vary dependant on the lens you select during that time. Following is the front view scale comparison of the K-x against the S1.

Pentax K-x vs Pentax S1 size comparison

Looking at dimensions and weight, the portability score of the K-x and S1 is 69 and 93 respectively.

Pentax K-x vs Pentax S1 top view buttons comparison

Pentax K-x vs Pentax S1 Sensor Comparison

Typically, it's hard to visualize the gap between sensor dimensions only by reading specifications. The pic underneath might give you a better sense of the sensor dimensions in the K-x and S1.

Plainly, both of these cameras offer different resolutions and different sensor dimensions. The K-x due to its larger sensor is going to make achieving bokeh simpler and the Pentax S1 will offer you extra detail having its extra 2 Megapixels. Greater resolution will allow you to crop pics a little more aggressively. The more aged K-x is going to be behind in sensor innovation.

Pentax K-x vs Pentax S1 sensor size comparison

Pentax K-x vs Pentax S1 Screen and ViewFinder

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

Portrait Comparison

Pentax K-x Portrait photography features
Pentax S1 Portrait photography features
63
has manual focus
sensor size is good (APS-C)
comes with face detection focus
saves RAW formats
low megapixels (12MP)
35
manual focus
megapixel count good (14MP)
no manual control
no external flash support
small sensor size (1/2.3")
lack of RAW support
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Street Comparison

Pentax K-x Street photography highlights
Pentax S1 Street photography highlights
67
image stabilization (Sensor based)
sensor size is good (APS-C)
saves RAW formats
no moving screen
56
has image stabilization (Sensor-shift)
no moving screen
small sensor size (1/2.3")
lack of RAW support
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Sports Comparison

Pentax K-x Sports photography info
Pentax S1 Sports photography info
61
high shutter speed (1/6,000s)
image stabilization (Sensor based)
sensor size is good (APS-C)
great battery (1,900 CIPA)
sensor has phase detect auto focus
continuous shooting slow (5.0 frames per second)
low megapixels (12 megapixels)
39
has image stabilization (Sensor-shift)
megapixel count good (14MP)
includes tracking focus
low frames per second (1.0 frames per second)
no shutter priority
small sensor size (1/2.3")
lack of phase detect autofocus
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Travel Comparison

Pentax K-x Travel photography features
Pentax S1 Travel photography features
54
great battery (1,900 shots)
flash built-in
lack of Timelapse function
low megapixels (12 megapixels)
doesn't posses selfie friendly display
64
megapixel count good (14 megapixels)
flash built-in
decently wide (28mm)
lack of Timelapse function
does not contain selfie friendly display
somewhat slow max aperture (f3.5)
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Landscape Comparison

Pentax K-x Landscape photography info
Pentax S1 Landscape photography info
61
has manual focus
switch lenses (Pentax KAF2 mount)
image stabilization (Sensor based)
sensor size is good (APS-C)
saves RAW formats
great battery (1,900 shots)
screen is somewhat small (2.7 inches)
low megapixels (12 megapixels)
lack of Timelapse function
42
manual focus
decently wide (28mm)
has image stabilization (Sensor-shift)
megapixel count good (14 megapixels)
cannot switch lens (fixed lens mount)
somewhat slow max aperture (f3.5)
screen is small (2.7 inches)
no manual control
small sensor size (1/2.3")
lack of RAW support
lack of Timelapse function
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Vlogging Comparison

Vlogging with Pentax K-x
Vlogging with Pentax S1
27
image stabilization (Sensor based)
comes with face detection focus
doesn't posses selfie friendly display
low res video (1280 x 720 pxls)
lack of external microphone support
28
decently wide (28mm)
has image stabilization (Sensor-shift)
somewhat slow max aperture (f3.5)
does not contain selfie friendly display
low quality video (1280 x 720 pxls)
lack of microphone port
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Pentax K-x vs Pentax S1 Specifications

Detailed spec comparison table for Pentax K-x and Pentax S1
 Pentax K-xPentax Optio S1
General Information
Brand Pentax Pentax
Model Pentax K-x Pentax Optio S1
Category Entry-Level DSLR Small Sensor Compact
Released 2009-12-23 2011-03-02
Body design Compact SLR Compact
Sensor Information
Processor Chip Prime -
Sensor type CMOS CCD
Sensor size APS-C 1/2.3"
Sensor measurements 23.6 x 15.8mm 6.17 x 4.55mm
Sensor area 372.9mm² 28.1mm²
Sensor resolution 12 megapixel 14 megapixel
Anti aliasing filter
Aspect ratio 3:2 1:1, 4:3 and 16:9
Peak resolution 4288 x 2848 4288 x 3216
Highest native ISO 6400 6400
Highest enhanced ISO 12800 -
Lowest native ISO 100 80
RAW format
Autofocusing
Manual focus
AF touch
AF continuous
Single AF
Tracking AF
Selective AF
Center weighted AF
Multi area AF
AF live view
Face detect AF
Contract detect AF
Phase detect AF
Number of focus points 11 9
Lens
Lens mount Pentax KAF2 fixed lens
Lens focal range - 28-140mm (5.0x)
Highest aperture - f/3.5-5.5
Macro focus distance - 1cm
Total lenses 151 -
Crop factor 1.5 5.8
Screen
Display type Fixed Type Fixed Type
Display size 2.7 inches 2.7 inches
Display resolution 230k dot 230k dot
Selfie friendly
Liveview
Touch function
Display tech TFT LCD monitor 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 30 secs 4 secs
Fastest shutter speed 1/6000 secs 1/1500 secs
Continuous shutter speed 5.0 frames per sec 1.0 frames per sec
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes -
Custom WB
Image stabilization
Built-in flash
Flash range 16.00 m 3.90 m
Flash modes Auto, On, Off, Red-Eye, Slow Sync, Rear curtain, Wireless Auto, On, Off, Red-eye, Soft
Hot shoe
Auto exposure bracketing
WB bracketing
Fastest flash sync 1/180 secs -
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Supported video resolutions 1280 x 720 (24 fps), 640 x 416 (24 fps) 1280 x 720 (30, 15 fps), 640 x 480 (30, 15 fps), 320 x 240 (30, 15 fps)
Highest video resolution 1280x720 1280x720
Video data format Motion JPEG Motion JPEG
Microphone jack
Headphone jack
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 580 gr (1.28 lb) 157 gr (0.35 lb)
Dimensions 123 x 92 x 68mm (4.8" x 3.6" x 2.7") 114 x 58 x 28mm (4.5" x 2.3" x 1.1")
DXO scores
DXO Overall score 72 not tested
DXO Color Depth score 22.8 not tested
DXO Dynamic range score 12.5 not tested
DXO Low light score 811 not tested
Other
Battery life 1900 photos 260 photos
Battery form Battery Pack Battery Pack
Battery model 4 x AA D-LI92
Self timer Yes (2 or 12 sec) Yes (2 or 10 sec)
Time lapse feature
Storage media SD/SDHC card SD/SDHC/SDXC, Internal
Storage slots One One
Retail price $600 $174