Olympus TG-5 vs Pentax 645D
The Olympus Tough TG-5 and the Pentax 645D are two digital cameras that were revealed to the public, respectively, in May 2017 and March 2010. The TG-5 is a fixed lens compact, while the 645D is a DSLR. The cameras are based on a 1/2.3-inch (TG-5) and a medium format (645D) sensor. The Olympus has a resolution of 12 megapixels, whereas the Pentax provides 39.5 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus Tough TG-5 and the Pentax 645D? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.
The side-by-side display below illustrates the physical size and weight of the Olympus TG-5 and the Pentax 645D. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth dimensions are rounded to the nearest millimeter.
The TG-5 can be obtained in two different colors (black, red), while the 645D is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax 645D is considerably larger (145 percent) than the Olympus TG-5. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments. More than that, the TG-5 is water-proof up to 15m and can, thus, be used for underwater photography.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the TG-5 has a lens built in, whereas the 645D is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.
Concerning battery life, the TG-5 gets 340 shots out of its LI-92B battery, while the 645D can take 800 images on a single charge of its D-LI90 power pack. The power pack in the TG-5 can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.
The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
|1.||Olympus TG-5||113 mm||66 mm||32 mm||250 g||340||Y||May 2017||449|
|2.||Pentax 645D||156 mm||117 mm||119 mm||1480 g||800||Y||Mar 2010||9,995|
|3.||Canon SX740||110 mm||64 mm||40 mm||299 g||265||n||Jul 2018||399|
|4.||Canon SX730||110 mm||64 mm||40 mm||300 g||250||n||Apr 2017||399|
|5.||Canon 1D X||158 mm||168 mm||83 mm||1551 g||1120||Y||Oct 2011||6,799|
|6.||Canon 1D Mark IV||156 mm||157 mm||80 mm||1230 g||1500||Y||Oct 2009||4,999|
|7.||Fujifilm XP130||110 mm||71 mm||28 mm||207 g||240||n||Jan 2018||229|
|8.||Leica S Typ 006||160 mm||120 mm||80 mm||1260 g||..||Y||Sep 2012||21,950|
|9.||Nikon W300||112 mm||66 mm||29 mm||231 g||280||Y||May 2017||389|
|10.||Nikon D3S||160 mm||157 mm||88 mm||1240 g||4200||Y||Oct 2009||5,199|
|11.||Olympus TG-6||113 mm||66 mm||32 mm||253 g||340||Y||May 2019||449|
|12.||Olympus TG-4||112 mm||66 mm||31 mm||247 g||380||Y||Apr 2015||379|
|13.||Olympus E-PM1||110 mm||64 mm||34 mm||265 g||330||n||Jun 2011||499|
|14.||Olympus XZ-1||111 mm||65 mm||42 mm||275 g||320||n||Jan 2011||499|
|15.||Panasonic TS7||117 mm||76 mm||37 mm||319 g||300||Y||May 2018||449|
|16.||Pentax 645Z||156 mm||117 mm||123 mm||1550 g||650||Y||Apr 2014||8,499|
|17.||Sony HX99||102 mm||58 mm||36 mm||242 g||370||n||Aug 2018||449|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
Any camera decision will obviously take relative prices into account. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The TG-5 was launched at a lower price than the 645D, despite having a lens built in. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down.
The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Olympus TG-5 features a 1/2.3-inch sensor and the Pentax 645D a medium format sensor. The sensor area in the 645D is 5086 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 5.6 and 0.79. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.
With 39.5MP, the 645D offers a higher resolution than the TG-5 (12MP), but the 645D nevertheless has larger individual pixels (pixel pitch of 6.06μm versus 1.53μm for the TG-5) due to its larger sensor. However, the TG-5 is a much more recent model (by 7 years and 2 months) than the 645D, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the 645D has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Pentax 645D implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the 645D for good quality output (200 dots per inch) amounts to 36.3 x 27.2 inches or 92.3 x 69.1 cm, for very good quality (250 dpi) 29.1 x 21.8 inches or 73.8 x 55.3 cm, and for excellent quality (300 dpi) 24.2 x 18.1 inches or 61.5 x 46.1 cm. The corresponding values for the Olympus TG-5 are 20 x 15 inches or 50.8 x 38.1 cm for good quality, 16 x 12 inches or 40.6 x 30.5 cm for very good quality, and 13.3 x 10 inches or 33.9 x 25.4 cm for excellent quality prints.
The Olympus Tough TG-5 has a native sensitivity range from ISO 100 to ISO 12800. The corresponding ISO settings for the Pentax 645D are ISO 100 to ISO 1600 (no boost).
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
|2.||Pentax 645D||Medium Format||39.5||7264||5440||none||24.6||12.6||1262||82|
|5.||Canon 1D X||Full Frame||17.9||5184||3456||1080/30p||23.8||11.8||2786||82|
|6.||Canon 1D Mark IV||APS-H||16.0||4896||3264||1080/30p||22.8||12.0||1320||74|
|8.||Leica S Typ 006||Medium Format||37.5||7500||5000||none||23.9||12.2||824||76|
|10.||Nikon D3S||Full Frame||12.1||4256||2832||720/24p||23.5||12.0||3253||82|
|13.||Olympus E-PM1||Four Thirds||12.2||4032||3024||1080/60i||21.0||10.3||499||52|
|16.||Pentax 645Z||Medium Format||51.1||8256||6192||1080/60i||26.0||14.7||4505||101|
|Note: DXO values in italics represent estimates based on sensor size and age.|
Many modern cameras cannot only take still pictures, but also record videos. The TG-5 indeed provides movie recording capabilities, while the 645D does not. The highest resolution format that the TG-5 can use is 4K/30p.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the 645D has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the TG-5 relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Olympus TG-5, the Pentax 645D, and comparable cameras.
|1.||Olympus TG-5||none||n||3.0 / 460||fixed||n||1/2000s||20.0||Y||Y|
|2.||Pentax 645D||optical||Y||3.0 / 921||fixed||n||1/4000s||1.1||n||n|
|3.||Canon SX740||none||n||3.0 / 922||tilting||n||1/3200s||10.0||Y||Y|
|4.||Canon SX730||none||n||3.0 / 922||tilting||n||1/3200s||5.9||Y||Y|
|5.||Canon 1D X||optical||Y||3.2 / 1040||fixed||n||1/8000s||14.0||n||n|
|6.||Canon 1D Mark IV||optical||Y||3.0 / 920||fixed||n||1/8000s||10.0||n||n|
|7.||Fujifilm XP130||none||n||3.0 / 920||fixed||n||1/2000s||10.0||Y||Y|
|8.||Leica S Typ 006||optical||Y||3.0 / 922||fixed||n||1/4000s||1.5||n||n|
|9.||Nikon W300||none||n||3.0 / 921||fixed||n||1/4000s||7.0||Y||Y|
|10.||Nikon D3S||optical||Y||3.0 / 921||fixed||n||1/8000s||11.0||n||n|
|11.||Olympus TG-6||none||n||3.0 / 1040||fixed||n||1/2000s||20.0||Y||Y|
|12.||Olympus TG-4||none||n||3.0 / 460||fixed||n||1/2000s||5.0||Y||Y|
|13.||Olympus E-PM1||optional||n||3.0 / 460||fixed||n||1/4000s||5.5||n||Y|
|14.||Olympus XZ-1||optional||n||3.0 / 614||fixed||n||1/2000s||2.0||Y||Y|
|15.||Panasonic TS7||1170||n||3.0 / 1040||fixed||n||1/1300s||10.0||Y||Y|
|16.||Pentax 645Z||optical||Y||3.2 / 1037||tilting||n||1/4000s||3.0||n||n|
|17.||Sony HX99||638||n||3.0 / 922||tilting||Y||1/2000s||10.0||Y||Y|
One difference between the cameras concerns the presence of an on-board flash. The TG-5 has one, while the 645D does not. While the built-in flash of the TG-5 is not very powerful, it can at times be useful as a fill-in light.
The Olympus TG-5 and the Pentax 645D both have an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
Concerning the storage of imaging data, both the TG-5 and the 645D write their files to SDXC cards. The 645D features dual card slots, which can be very useful in case a memory card fails. In contrast, the TG-5 only has one slot. The TG-5 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the 645D cannot take advantage of Ultra High Speed SD cards.
For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Olympus Tough TG-5 and Pentax 645D and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Olympus TG-5||-||stereo / mono||-||-||micro||2.0||Y||-||-|
|2.||Pentax 645D||Y||stereo / -||-||-||-||2.0||-||-||-|
|3.||Canon SX740||-||stereo / mono||-||-||micro||2.0||Y||-||Y|
|4.||Canon SX730||-||stereo / mono||-||-||micro||2.0||Y||Y||Y|
|5.||Canon 1D X||Y||mono / -||Y||-||mini||2.0||-||-||-|
|6.||Canon 1D Mark IV||Y||stereo / -||Y||-||mini||2.0||-||-||-|
|7.||Fujifilm XP130||-||mono / mono||-||-||micro||2.0||Y||-||Y|
|8.||Leica S Typ 006||Y||- / -||-||-||mini||2.0||-||-||-|
|9.||Nikon W300||-||stereo / mono||-||-||micro||2.0||Y||-||Y|
|10.||Nikon D3S||Y||stereo / -||-||-||mini||2.0||-||-||-|
|11.||Olympus TG-6||-||stereo / mono||-||-||micro||2.0||Y||-||-|
|12.||Olympus TG-4||-||stereo / mono||-||-||micro||2.0||Y||-||-|
|13.||Olympus E-PM1||Y||stereo / mono||-||-||mini||2.0||-||-||-|
|14.||Olympus XZ-1||Y||mono / -||-||-||mini||2.0||-||-||-|
|15.||Panasonic TS7||-||stereo / mono||-||-||micro||2.0||Y||-||-|
|16.||Pentax 645Z||Y||stereo / mono||Y||-||mini||3.0||-||-||-|
|17.||Sony HX99||-||stereo / mono||-||-||micro||2.0||Y||Y||Y|
It is notable that the TG-5 offers wifi support, while the 645D does not. Wifi can be a very convenient means to transfer image data to an off-camera location.
Studio photographers will appreciate that the Pentax 645D (unlike the TG-5) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Travel and landscape photographers will find it useful that the TG-5 has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.
Both the TG-5 and the 645D have been discontinued, but can regularly be found used on eBay. The 645D was replaced by the Pentax 645Z, while the TG-5 was followed by the Olympus TG-6. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Olympus and Pentax websites.
So what is the bottom line? Is there a clear favorite between the Olympus TG-5 and the Pentax 645D? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Reasons to prefer the Olympus Tough TG-5:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Broader imaging potential: Can record not only still images but also 4K/30p movies.
- Faster burst: Shoots at higher frequency (20 vs 1.1 flaps/sec) to capture the decisive moment.
- Ready to shoot: Comes with a built-in lens, while the 645D requires a separate lens.
- More compact: Is smaller (113x66mm vs 156x117mm) and thus needs less room in the bag.
- Less heavy: Is lighter even though it comes with a built-in lens (unlike the 645D).
- Easier travel charging: Can be conveniently charged via its USB port.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- Water-proof: Is rugged and sealed and can thus be used for underwater photography (up to 15m).
- Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
- Easier geotagging: Features an internal GPS sensor to log localization data.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More affordable: Was introduced at a lower price, despite coming with a built-in lens.
- More modern: Reflects 7 years and 2 months of technical progress since the 645D launch.
Arguments in favor of the Pentax 645D:
- More detail: Has more megapixels (39.5 vs 12MP), which boosts linear resolution by 82%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Features bigger pixels on a larger sensor for higher quality imaging.
- Richer colors: The pixel size advantage translates into images with better, more accurate colors.
- More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
- Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
- Easier framing: Has an optical viewfinder for image composition and settings control.
- Easier setting verification: Features a control panel on top to check shooting parameters.
- More detailed LCD: Has a higher resolution rear screen (921k vs 460k dots).
- Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
- More flexible: Makes it possible to change lenses and thus to use specialty optics.
- Longer lasting: Gets more shots (800 versus 340) out of a single battery charge.
- Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- More heavily discounted: Has been around for much longer (launched in March 2010).
If the count of relative strengths (bullet points above) is taken as a measure, the 645D comes out slightly ahead of the TG-5 (16 : 15 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
How about other alternatives? Do the specifications of the Olympus TG-5 and the Pentax 645D place the cameras among the top in their class? Find out in the latest Best Travel-Zoom Camera and Best DSLR Camera listings whether the two cameras rank among the cream of the crop.
In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains incomplete and does no justice, for example, to the way the TG-5 or the 645D perform in practice. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.
This is why hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.
|1.||Olympus TG-5||..||+ +||..||..||4/5||4/5||May 2017||449|
|2.||Pentax 645D||5/5||..||..||..||..||..||Mar 2010||9,995|
|3.||Canon SX740||..||+||3.5/5||..||4/5||4/5||Jul 2018||399|
|4.||Canon SX730||..||+||..||..||4/5||4/5||Apr 2017||399|
|5.||Canon 1D X||5/5||..||..||..||4.5/5||4.5/5||Oct 2011||6,799|
|6.||Canon 1D Mark IV||5/5||..||..||89/100||..||..||Oct 2009||4,999|
|7.||Fujifilm XP130||..||o||..||..||3.5/5||4/5||Jan 2018||229|
|8.||Leica S Typ 006||..||..||..||..||..||..||Sep 2012||21,950|
|9.||Nikon W300||..||+||..||..||4/5||4/5||May 2017||389|
|10.||Nikon D3S||5/5||..||..||89/100||4.5/5||5/5||Oct 2009||5,199|
|11.||Olympus TG-6||..||+ +||4.5/5||76/100||4/5||4/5||May 2019||449|
|12.||Olympus TG-4||..||+||..||79/100||4/5||4/5||Apr 2015||379|
|13.||Olympus E-PM1||..||86/100||..||71/100||4.5/5||4.5/5||Jun 2011||499|
|14.||Olympus XZ-1||4/5||..||..||74/100||4.5/5||4.5/5||Jan 2011||499|
|15.||Panasonic TS7||..||+||..||..||..||3.5/5||May 2018||449|
|16.||Pentax 645Z||5/5||..||..||..||4.5/5||5/5||Apr 2014||8,499|
|17.||Sony HX99||..||..||..||..||4/5||4.5/5||Aug 2018||449|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
Other camera comparisons
Did this review help to inform your camera decision process? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
- Canon 5D Mark IV vs Pentax 645D
- Canon M10 vs Olympus TG-5
- Leica S-E Typ 006 vs Olympus TG-5
- Nikon A1000 vs Olympus TG-5
- Nikon D1H vs Pentax 645D
- Nikon D2H vs Pentax 645D
- Nikon D40 vs Pentax 645D
- Olympus E-M1 II vs Pentax 645D
- Olympus TG-5 vs Panasonic G85
- Olympus TG-5 vs Panasonic LX15
- Olympus TG-5 vs Sony A7R II
- Panasonic GX9 vs Pentax 645D
Specifications: Olympus TG-5 vs Pentax 645D
Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.
|Camera Model||Olympus TG-5||Pentax 645D|
|Camera Type||Fixed lens compact camera||Digital single lens reflex|
|Camera Lens||25-100mm f/2.0-4.9||Pentax 645 mount lenses|
|Launch Date||May 2017||March 2010|
|Launch Price||USD 449||USD 9,995|
|Sensor Specs||Olympus TG-5||Pentax 645D|
|Sensor Format||1/2.3" Sensor||Medium Format Sensor|
|Sensor Size||6.17 x 4.55 mm||44.0 x 33.0 mm|
|Sensor Area||28.0735 mm2||1452 mm2|
|Sensor Diagonal||7.7 mm||55 mm|
|Sensor Resolution||12 Megapixels||39.5 Megapixels|
|Image Resolution||4000 x 3000 pixels||7264 x 5440 pixels|
|Pixel Pitch||1.53 μm||6.06 μm|
|Pixel Density||42.74 MP/cm2||2.72 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||4K/30p Video||no Video|
|ISO Setting||100 - 12,800 ISO||100 - 1,600 ISO|
|Image Processor||TruePic VIII||PRIME II|
|DXO Sensor Quality (score)||..||82|
|DXO Color Depth (bits)||..||24.6|
|DXO Dynamic Range (EV)||..||12.6|
|DXO Low Light (ISO)||..||1262|
|Screen Specs||Olympus TG-5||Pentax 645D|
|Viewfinder Type||no viewfinder||Optical viewfinder|
|Viewfinder Field of View||98%|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||460k dots||921k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Shooting Specs||Olympus TG-5||Pentax 645D|
|Focus System||Contrast-detect AF||Phase-detect AF|
|Manual Focusing Aid||Focus Peaking||no Peaking Feature|
|Continuous Shooting||20 shutter flaps/s||1.1 shutter flaps/s|
|Time-Lapse Photography||Intervalometer built-in||Intervalometer built-in|
|Image Stabilization||In-body stabilization||Lens stabilization only|
|Fill Flash||Built-in Flash||no On-Board Flash|
|Storage Medium||SDXC cards||SDXC cards|
|Second Storage Option||Single card slot||Dual card slots|
|UHS card support||UHS-I||no|
|Connectivity Specs||Olympus TG-5||Pentax 645D|
|External Flash||no Hotshoe||Hotshoe|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||micro HDMI||no HDMI|
|Wifi Support||Wifi built-in||no Wifi|
|Geotagging||GPS built-in||no internal GPS|
|Body Specs||Olympus TG-5||Pentax 645D|
|Environmental Sealing||Waterproof body (15m)||Weathersealed body|
|Battery Life (CIPA)||340 shots per charge||800 shots per charge|
|In-Camera Charging||USB charging||no USB charging|
113 x 66 x 32 mm
(4.4 x 2.6 x 1.3 in)
156 x 117 x 119 mm
(6.1 x 4.6 x 4.7 in)
|Camera Weight||250 g (8.8 oz)||1480 g (52.2 oz)|
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