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Olympus TG-870 vs Pentax K-S1

Portability
91 Imaging
41 Features
46 Overall
43
Olympus Stylus Tough TG-870 front
 
Pentax K-S1 front
Portability
69 Imaging
63 Features
70 Overall
65

Olympus TG-870 vs Pentax K-S1 Key Specs

Olympus TG-870
(Full Review)
  • 16MP - 1/2.3" Sensor
  • 3" Tilting Display
  • ISO 125 - 6400 (Expand to 12800)
  • Optical Image Stabilization
  • 1920 x 1080 video
  • 21-105mm (F3.5-5.7) lens
  • 221g - 113 x 64 x 28mm
  • Introduced January 2016
  • Superseded the Olympus TG-860
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 Maximum Shutter
  • 1920 x 1080 video
  • Pentax KAF2 Mount
  • 558g - 121 x 93 x 70mm
  • Announced August 2014
  • Refreshed by Pentax K-S2
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Olympus TG-870 vs Pentax K-S1 Overview

Below, we are analyzing the Olympus TG-870 and Pentax K-S1, former is a Ultracompact while the other is a Advanced DSLR by rivals Olympus and Pentax. The sensor resolution of the TG-870 (16MP) and the K-S1 (20MP) is very comparable but the TG-870 (1/2.3") and K-S1 (APS-C) feature different sensor size.

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The TG-870 was announced 17 months after the K-S1 making the cameras a generation away from each other. Each of the cameras come with different body type with the Olympus TG-870 being a Ultracompact camera and the Pentax K-S1 being a Mid-size SLR camera.

Before delving through a complete comparison, below is a concise summation of how the TG-870 grades vs the K-S1 with regard to portability, imaging, features and an overall mark.

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Reasons to pick Olympus TG-870 over the Pentax K-S1

          

          

            
 TG-870 K-S1 
AnnouncedJanuary 2016August 2014Newer by 17 months
Display typeTiltingFixed Tilting display
          

        


        

          

            
Reasons to pick Pentax K-S1 over the Olympus TG-870

          

          

            
 K-S1 TG-870 
Manual focus  More accurate focus
          

        


        

          

            
Common features in the Olympus TG-870 and Pentax K-S1

          

          

            
 TG-870 K-S1 
Display dimension3"3"Identical display size
Display resolution921k921kExact same display resolution
Selfie screen  Missing selfie screen
Touch display  Missing Touch display
          

        

        

	
	
	
	

        

          

            
Olympus TG-870 vs Pentax K-S1 Physical Comparison

          

          

            
If you're planning to travel with your camera, you'll need to factor its weight and volume. The Olympus TG-870 features outer measurements of 113mm x 64mm x 28mm (4.4" x 2.5" x 1.1") having a weight of 221 grams (0.49 lbs) and the Pentax K-S1 has sizing of 121mm x 93mm x 70mm (4.8" x 3.7" x 2.8") with a weight of 558 grams (1.23 lbs).
Analyze the Olympus TG-870 and Pentax K-S1 in our newest Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses
Keep in mind, the weight of an ILC will differ based on the lens you choose at that moment. Below is the front view dimension comparison of the TG-870 against the K-S1.
Olympus TG-870 vs Pentax K-S1 size comparison
Using size and weight, the portability rating of the TG-870 and K-S1 is 91 and 69 respectively.
Olympus TG-870 vs Pentax K-S1 top view buttons comparison          

        


        

          

            
Olympus TG-870 vs Pentax K-S1 Sensor Comparison

          

          

            
Usually, it is very difficult to visualize the contrast in sensor dimensions only by going through technical specs. The image underneath may provide you a far better sense of the sensor sizing in the TG-870 and K-S1.
As you can tell, both of those cameras have got different resolutions and different sensor dimensions. The TG-870 with its smaller sensor is going to make achieving bokeh trickier and the Pentax K-S1 will produce greater detail with its extra 4MP. Greater resolution will allow you to crop images much more aggressively. The more modern TG-870 should have an advantage in sensor tech.

            Olympus TG-870 vs Pentax K-S1 sensor size comparison
          

        


        

          

            
Olympus TG-870 vs Pentax K-S1 Screen and ViewFinder

          

          

                      

          Olympus TG-870 vs Pentax K-S1 Screen and Viewfinder comparison        


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Photography Type Scores

          

        

        
Portrait Comparison
Portrait photography with Olympus TG-870
Portrait photography with Pentax K-S1
36
 decent sensor resolution (16 megapixels)
 supports face detection focusing
 manual focus not available
 manual mode not available
 cannot use external flash
 small sensor size (1/2.3")
 does not have RAW format
77
 manual focus
 good MP (20MP)
 sensor size is good (APS-C)
 features face detection autofocus
 exports RAW formats
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Street Comparison
Olympus TG-870 Street photography information
Pentax K-S1 Street photography information
65
 screen tilts up and down
 has image stabilization (Optical)
 environment sealing
 small sensor size (1/2.3")
 does not have RAW format
 heavier than competition in class (221 grams)
73
 has image stabilization (Sensor based)
 sensor size is good (APS-C)
 exports RAW formats
 lighter than others in class (558 grams)
 above average high ISO (51,200)
 screen does not articulate
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Sports Comparison
Sports photography with Olympus TG-870
Sports photography with Pentax K-S1
51
 has image stabilization (Optical)
 decent sensor resolution (16MP)
 supports tracking autofocus
 environment sealing
 good battery (300 shots)
 no shutter priority
 small sensor size (1/2.3")
 does not have phase detect AF
69
 maximum shutter speed is high (1/6,000 seconds)
 has image stabilization (Sensor based)
 good MP (20MP)
 sensor size is good (APS-C)
 features tracking autofocus
 has phase detect autofocus
 continuous shooting slow (5.4 fps)
 bad battery power (410 per charge)
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Travel Comparison
Travel photography with Olympus TG-870
Travel photography with Pentax K-S1
69
 good battery (300 per charge)
 environment sealing
 decent sensor resolution (16 megapixels)
 built-in flash
 rather wide (21mm)
 heavier than competition in class (221g)
 doesn't feature selfie friendly screen
 slow max aperture (f3.5)
60
 lighter than others in class (558 grams)
 good MP (20 megapixels)
 has built in flash
 doesn't have Time Lapse recording
 bad battery power (410 CIPA)
 display is not selfie friendly
Photography Glossary
Landscape Comparison
Olympus TG-870 Landscape photography info
Pentax K-S1 Landscape photography info
50
 rather wide (21mm)
 nice screen size (3")
 has image stabilization (Optical)
 decent sensor resolution (16 megapixels)
 environment sealing
 good battery (300 per charge)
 manual focus not available
 lens is fixed (fixed lens mount)
 slow max aperture (f3.5)
 manual mode not available
 small sensor size (1/2.3")
 does not have RAW format
73
 manual focus
 interchangeable lenses (Pentax KAF2 mount)
 pretty good screen size (3 inch)
 has image stabilization (Sensor based)
 good MP (20MP)
 sensor size is good (APS-C)
 doesnt have anti aliasing filter
 above average high ISO (51,200)
 exports RAW formats
 bad battery power (410 CIPA)
 doesn't have Time Lapse recording
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Vlogging Comparison
Vlogging with Olympus TG-870
Vlogging with Pentax K-S1
32
 rather wide (21mm)
 has image stabilization (Optical)
 supports face detection focusing
 high quality video (1920 x 1080 pixels)
 slow max aperture (f3.5)
 doesn't feature selfie friendly screen
 does not have external mic jack
 heavier than competition in class (221g)
33
 has image stabilization (Sensor based)
 features face detection autofocus
 video resolution high (1920 x 1080 resolution)
 lighter than others in class (558g)
 display is not selfie friendly
 doesn't have external mic socket
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Olympus TG-870 vs Pentax K-S1 Specifications

          

          

                      


          

            Detailed spec comparison table for Olympus TG-870 and Pentax K-S1
 Olympus Stylus Tough TG-870Pentax K-S1
General Information
Brand Olympus Pentax
Model type Olympus Stylus Tough TG-870 Pentax K-S1
Type Ultracompact Advanced DSLR
Introduced 2016-01-06 2014-08-27
Physical type Ultracompact Mid-size SLR
Sensor Information
Powered by TruePic VII Prime MII
Sensor type BSI-CMOS CMOS
Sensor size 1/2.3" APS-C
Sensor dimensions 6.17 x 4.55mm 23.5 x 15.6mm
Sensor area 28.1mm² 366.6mm²
Sensor resolution 16 megapixel 20 megapixel
Anti alias filter    
Aspect ratio 1:1, 4:3, 3:2 and  16:9 3:2
Maximum resolution 4608 x 3456 5472 x 3648
Maximum native ISO 6400 51200
Maximum boosted ISO 12800 -
Minimum native ISO 125 100
RAW pictures    
Autofocusing
Manual focusing    
Touch to focus    
Continuous AF    
AF single    
AF tracking    
Selective AF    
AF center weighted    
AF multi area    
AF live view    
Face detect focusing    
Contract detect focusing    
Phase detect focusing    
Total focus points - 11
Lens
Lens mount type fixed lens Pentax KAF2
Lens zoom range 21-105mm (5.0x) -
Highest aperture f/3.5-5.7 -
Macro focusing distance 1cm -
Number of lenses - 151
Focal length multiplier 5.8 1.5
Screen
Type of display Tilting Fixed Type
Display sizing 3 inches 3 inches
Resolution of display 921 thousand dots 921 thousand dots
Selfie friendly    
Liveview    
Touch friendly    
Viewfinder Information
Viewfinder type None Optical (pentaprism)
Viewfinder coverage - 100%
Viewfinder magnification - 0.64x
Features
Lowest shutter speed 4 secs 30 secs
Highest shutter speed 1/2000 secs 1/6000 secs
Continuous shooting rate 7.0fps 5.4fps
Shutter priority    
Aperture priority    
Manually set exposure    
Exposure compensation - Yes
Custom WB    
Image stabilization    
Built-in flash    
Flash distance 4.00 m (at ISO 1600) 10.00 m (at ISO 100)
Flash settings Auto, redeye reduction, fill flash, off, LED illuminator Auto, auto + redeye, on, on + redeye reduction, slow sync, trailing curtain sync, manual
External flash    
Auto exposure bracketing    
White balance bracketing    
Exposure
Multisegment metering    
Average metering    
Spot metering    
Partial metering    
AF area metering    
Center weighted metering    
Video features
Supported video resolutions 1920 x 1080 (60p), 1280 x 720 (60p), 640 x 480 (60p) 1920 x 1080 (30,25,24 fps), 1280 x 720 (60,50 fps)
Maximum video resolution 1920x1080 1920x1080
Video format MPEG-4, H.264 H.264
Mic port    
Headphone port    
Connectivity
Wireless Built-In Eye-Fi Connected
Bluetooth    
NFC    
HDMI    
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS BuiltIn Optional
Physical
Environmental sealing    
Water proofing    
Dust proofing    
Shock proofing    
Crush proofing    
Freeze proofing    
Weight 221 grams (0.49 lb) 558 grams (1.23 lb)
Dimensions 113 x 64 x 28mm (4.4" x 2.5" x 1.1") 121 x 93 x 70mm (4.8" x 3.7" x 2.8")
DXO scores
DXO All around rating not tested 78
DXO Color Depth rating not tested 23.5
DXO Dynamic range rating not tested 13.0
DXO Low light rating not tested 1061
Other
Battery life 300 pictures 410 pictures
Style of battery Battery Pack Battery Pack
Battery ID Li-50B D-LI109
Self timer Yes (2 or 10 sec, custom) Yes ( 2 or 12 seconds)
Time lapse feature    
Storage type SD/SDHC/SDXC, Internal SD/SDHC/SDXC
Card slots 1 1
Retail cost $280 $339