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Olympus TG-870 vs Pentax 645D

Portability
91
Imaging
41
Features
46
Overall
43
Olympus Stylus Tough TG-870 front
 
Pentax 645D front
Portability
50
Imaging
76
Features
52
Overall
66

Olympus TG-870 vs Pentax 645D Key Specs

Olympus TG-870
(Full Review)
  • 16MP - 1/2.3" Sensor
  • 3" Tilting Display
  • ISO 125 - 6400 (Boost 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
  • Succeeded the Olympus TG-860
Pentax 645D
(Full Review)
  • 40MP - Medium format Sensor
  • 3" Fixed Screen
  • ISO 200 - 1600
  • No Anti-Alias Filter
  • No Video
  • Pentax 645AF2 Mount
  • 1480g - 156 x 117 x 119mm
  • Announced March 2010
  • Updated by Pentax 645Z
Photography Glossary

Olympus TG-870 vs Pentax 645D Overview

On this page, we will be looking at the Olympus TG-870 versus Pentax 645D, former being a Ultracompact while the latter is a Pro DSLR by brands Olympus and Pentax. There exists a large gap among the resolutions of the TG-870 (16MP) and 645D (40MP) and the TG-870 (1/2.3") and 645D (Medium format) provide totally different sensor measurements.

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The TG-870 was manufactured 5 years later than the 645D and that is a fairly serious difference as far as camera technology is concerned. Each of these cameras have different body design with the Olympus TG-870 being a Ultracompact camera and the Pentax 645D being a Large SLR camera.

Before delving right into a step-by-step comparison, here is a concise summary of how the TG-870 grades against the 645D for portability, imaging, features and an overall grade.

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Reasons to pick Olympus TG-870 over the Pentax 645D

 TG-870 645D 
AnnouncedJanuary 2016March 2010More recent by 71 months
Screen typeTiltingFixed Tilting screen

Reasons to pick Pentax 645D over the Olympus TG-870

 645D TG-870 
Focus manually Dial exact focusing

Common features in the Olympus TG-870 and Pentax 645D

 TG-870 645D 
Screen dimensions3"3"Equal screen measurements
Screen resolution921k921kExact same screen resolution
Selfie screen Lacking selfie screen
Touch screen Lacking Touch screen

Olympus TG-870 vs Pentax 645D Physical Comparison

If you're aiming to lug around your camera, you need to factor in its weight and proportions. The Olympus TG-870 features outer dimensions of 113mm x 64mm x 28mm (4.4" x 2.5" x 1.1") accompanied by a weight of 221 grams (0.49 lbs) and the Pentax 645D has measurements of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") along with a weight of 1480 grams (3.26 lbs).

Contrast the Olympus TG-870 versus Pentax 645D in our newest Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into consideration, the weight of an ILC will vary dependant on the lens you are utilising at that moment. Here is a front view over all size comparison of the TG-870 versus the 645D.

Olympus TG-870 vs Pentax 645D size comparison

Considering dimensions and weight, the portability grade of the TG-870 and 645D is 91 and 50 respectively.

Olympus TG-870 vs Pentax 645D top view buttons comparison

Olympus TG-870 vs Pentax 645D Sensor Comparison

Quite often, it is hard to visualise the contrast in sensor measurements just by researching specifications. The visual here will offer you a much better sense of the sensor sizes in the TG-870 and 645D.

To sum up, the two cameras have different resolutions and different sensor measurements. The TG-870 featuring a smaller sensor will make achieving shallow DOF more challenging and the Pentax 645D will result in greater detail due to its extra 24MP. Higher resolution will make it easier to crop photographs a bit more aggressively. The more modern TG-870 will have an advantage with regard to sensor tech.

Olympus TG-870 vs Pentax 645D sensor size comparison

Olympus TG-870 vs Pentax 645D Screen and ViewFinder

Olympus TG-870 vs Pentax 645D Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Olympus TG-870 Portrait photography details
Pentax 645D Portrait photography details
36
MP count decent (16MP)
offers face detection focusing
focusing manually not possible
lack of manual exposure
cannot use external flash
sensor size is small (1/2.3")
no RAW files
77
has manual focus
excellent megapixels (40MP)
great sensor size (Medium format)
supports RAW formats
does not have liveview
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Street Comparison

Olympus TG-870 as a Street photography camera
Pentax 645D as a Street photography camera
65
screen tilts
has image stabilization (Optical)
weather proofing
sensor size is small (1/2.3")
no RAW files
more heavy than competition in class (221 grams)
58
great sensor size (Medium format)
supports RAW formats
weather proofing
fixed screen
does not have image stabilization
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Sports Comparison

Sports photography with Olympus TG-870
Sports photography with Pentax 645D
51
has image stabilization (Optical)
MP count decent (16 megapixels)
offers tracking autofocus
weather proofing
better than average battery (300 CIPA)
no shutter priority mode
sensor size is small (1/2.3")
no phase detect AF
63
excellent megapixels (40 megapixels)
great sensor size (Medium format)
weather proofing
supports phase detect auto focus
does not have liveview
max frames per second low (1.0 frames/s)
does not have image stabilization
bad battery pack (800 shots)
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Travel Comparison

Olympus TG-870 Travel photography highlights
Pentax 645D Travel photography highlights
69
better than average battery (300 CIPA)
weather proofing
MP count decent (16 megapixels)
flash built-in
really wide (21mm)
more heavy than competition in class (221 grams)
doesn't contain selfie friendly screen
somewhat slow maximum aperture (f3.5)
55
weather proofing
excellent megapixels (40MP)
bad battery pack (800 shots)
does not have selfie friendly display
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Landscape Comparison

Olympus TG-870 Landscape photography factors
Pentax 645D Landscape photography factors
50
really wide (21mm)
decent sized screen (3 inch)
has image stabilization (Optical)
MP count decent (16 megapixels)
weather proofing
better than average battery (300 CIPA)
focusing manually not possible
lens is fixed (fixed lens mount)
somewhat slow maximum aperture (f3.5)
lack of manual exposure
sensor size is small (1/2.3")
no RAW files
72
has manual focus
interchangeable lenses (Pentax 645AF2 mount)
pretty good screen size (3")
excellent megapixels (40MP)
great sensor size (Medium format)
doesnt have anti aliasing filter
supports RAW formats
weather proofing
has dual storage slots
does not have liveview
does not have image stabilization
bad battery pack (800 per charge)
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Vlogging Comparison

Olympus TG-870 as a Vlogging camera
Pentax 645D as a Vlogging camera
32
really wide (21mm)
has image stabilization (Optical)
offers face detection focusing
video res high (1920 x 1080 resolution)
somewhat slow maximum aperture (f3.5)
doesn't contain selfie friendly screen
missing external microphone jack
more heavy than competition in class (221g)
9
no video shooting
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Olympus TG-870 vs Pentax 645D Specifications

Detailed spec comparison table for Olympus TG-870 and Pentax 645D
 Olympus Stylus Tough TG-870Pentax 645D
General Information
Make Olympus Pentax
Model type Olympus Stylus Tough TG-870 Pentax 645D
Class Ultracompact Pro DSLR
Introduced 2016-01-06 2010-03-10
Body design Ultracompact Large SLR
Sensor Information
Powered by TruePic VII Prime II
Sensor type BSI-CMOS CCD
Sensor size 1/2.3" Medium format
Sensor measurements 6.17 x 4.55mm 44 x 33mm
Sensor area 28.1mm² 1,452.0mm²
Sensor resolution 16MP 40MP
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 4:3
Highest Possible resolution 4608 x 3456 7264 x 5440
Maximum native ISO 6400 1600
Maximum enhanced ISO 12800 -
Minimum native ISO 125 200
RAW data
Minimum enhanced ISO - 100
Autofocusing
Manual focusing
Touch to focus
Continuous AF
AF single
Tracking AF
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 645AF2
Lens zoom range 21-105mm (5.0x) -
Max aperture f/3.5-5.7 -
Macro focusing range 1cm -
Number of lenses - 6
Crop factor 5.8 0.8
Screen
Display type Tilting Fixed Type
Display diagonal 3 inch 3 inch
Resolution of display 921k dot 921k dot
Selfie friendly
Liveview
Touch friendly
Display tech - TFT Color LCD with wide-viewing angle and with AR coating
Viewfinder Information
Viewfinder type None Optical (pentaprism)
Viewfinder coverage - 98 percent
Viewfinder magnification - 0.85x
Features
Min shutter speed 4 secs 30 secs
Max shutter speed 1/2000 secs 1/4000 secs
Continuous shutter speed 7.0 frames/s 1.0 frames/s
Shutter priority
Aperture priority
Manual exposure
Exposure compensation - Yes
Set WB
Image stabilization
Inbuilt flash
Flash distance 4.00 m (at ISO 1600) no built-in flash
Flash settings Auto, redeye reduction, fill flash, off, LED illuminator Auto, On, Off, Red-eye, Slow Sync, Rear Curtain
External flash
AE bracketing
White balance bracketing
Max flash sync - 1/125 secs
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Supported video resolutions 1920 x 1080 (60p), 1280 x 720 (60p), 640 x 480 (60p) -
Maximum video resolution 1920x1080 None
Video data format MPEG-4, H.264 -
Microphone input
Headphone input
Connectivity
Wireless Built-In None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS BuiltIn None
Physical
Environment seal
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 221g (0.49 lbs) 1480g (3.26 lbs)
Physical dimensions 113 x 64 x 28mm (4.4" x 2.5" x 1.1") 156 x 117 x 119mm (6.1" x 4.6" x 4.7")
DXO scores
DXO Overall rating not tested 82
DXO Color Depth rating not tested 24.6
DXO Dynamic range rating not tested 12.6
DXO Low light rating not tested 1262
Other
Battery life 300 photos 800 photos
Style of battery Battery Pack Battery Pack
Battery ID Li-50B D-LI90
Self timer Yes (2 or 10 sec, custom) Yes (2 or 10 sec)
Time lapse shooting
Storage media SD/SDHC/SDXC, Internal SD/SDHC
Storage slots One Dual
Retail price $280 $4,000