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Olympus E-M1 III vs Pentax K-70

The Olympus OM-D E-M1 Mark III and the Pentax K-70 are two digital cameras that were revealed to the public, respectively, in February 2020 and June 2016. The E-M1 III is a mirrorless interchangeable lens camera, while the K-70 is a DSLR. The cameras are based on a Four Thirds (E-M1 III) and an APS-C (K-70) sensor. The Olympus has a resolution of 20.2 megapixels, whereas the Pentax provides 24 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Olympus E-M1 III
versus
Pentax K-70
Olympus E-M1 III   Pentax K-70
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Pentax K mount lenses
20.2 MP – Four Thirds sensor 24 MP – APS-C sensor
4K/30p Video 1080/60i Video
ISO 200-25,600 ISO 100-102,400
Electronic viewfinder (2360k dots) Optical viewfinder
3.0" LCD – 1037k dots 3.0" LCD – 921k dots
Swivel touchscreen Swivel screen (not touch-sensitive)
18 shutter flaps per second 6 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
420 shots per battery charge410 shots per battery charge
134 x 91 x 69 mm, 580 g 126 x 93 x 74 mm, 688 g
Olympus E-M1 III:
Check current price at
i
Pentax K-70:
Check current price at
i

Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus OM-D E-M1 Mark III and the Pentax K-70? 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.

Body comparison

The physical size and weight of the Olympus E-M1 III and the Pentax K-70 are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth dimensions are rounded to the nearest millimeter.

The K-70 can be obtained in two different colors (black, silver), while the E-M1 III is only available in black.

Size Olympus E-M1 III vs Pentax K-70
Compare E-M1 III versus K-70 top
Comparison E-M1 III or K-70 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax K-70 is somewhat smaller (4 percent) than the Olympus E-M1 III. However, the K-70 is markedly heavier (19 percent) than the E-M1 III. 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.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the E-M1 III gets 420 shots out of its BLH-1 battery, while the K-70 can take 410 images on a single charge of its D-LI109 power pack. The power pack in the E-M1 III can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

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Body Specifications
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Olympus E-M1 III 134 mm 91 mm 69 mm 580 g 420 Y Feb 2020 1,799 i
2.
 
Pentax K-70 126 mm 93 mm 74 mm 688 g 410 Y Jun 2016 649 i
3.
 
Olympus E-M10 IV 122 mm 84 mm 49 mm 383 g 360 n Aug 2020 699 i
4.
 
Olympus E-M5 III 125 mm 85 mm 50 mm 414 g 310 Y Oct 2019 1,199 i
5.
 
Olympus E-M1X 144 mm 147 mm 75 mm 997 g 870 Y Jan 2019 2,999 i
6.
 
Olympus E-M1 II 134 mm 91 mm 67 mm 574 g 440 Y Sep 2016 1,999 i
7.
 
Olympus E-M1 130 mm 94 mm 63 mm 497 g 350 Y Sep 2013 1,399i
8.
 
Panasonic GH5 II 139 mm 98 mm 87 mm 727 g 400 Y May 2021 1,699 i
9.
 
Panasonic G95 130 mm 94 mm 77 mm 536 g 290 Y Apr 2019 999 i
10.
 
Panasonic G9 137 mm 97 mm 92 mm 658 g 400 Y Nov 2017 1,699 i
11.
 
Panasonic GH5 139 mm 98 mm 87 mm 725 g 410 Y Jan 2017 1,999i
12.
 
Panasonic GX8 133 mm 78 mm 63 mm 487 g 330 Y Jul 2015 1,199i
13.
 
Pentax K-3 III 135 mm 104 mm 74 mm 820 g 800 Y Mar 2021 1,999 i
14.
 
Pentax KP 132 mm 101 mm 76 mm 703 g 390 Y Jan 2017 1,099 i
15.
 
Pentax K-S2 123 mm 91 mm 73 mm 678 g 410 Y Feb 2015 749 i
16.
 
Pentax K-3 II 131 mm 100 mm 77 mm 800 g 720 Y Apr 2015 1,099i
17.
 
Pentax K-50 130 mm 97 mm 71 mm 650 g 410 Y Jun 2013 599i
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.

Any camera decision will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The K-70 was launched at a markedly lower price (by 64 percent) than the E-M1 III, which puts it into a different market segment. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

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Sensor comparison

The size of the imaging sensor is a crucial determinant 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 E-M1 III features a Four Thirds sensor and the Pentax K-70 an APS-C sensor. The sensor area in the K-70 is 63 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.5. The sensor in the E-M1 III has a native 4:3 aspect ratio, while the one in the K-70 offers a 3:2 aspect.

Olympus E-M1 III and Pentax K-70 sensor measures

With 24MP, the K-70 offers a higher resolution than the E-M1 III (20.2MP), but the K-70 nevertheless has larger individual pixels (pixel pitch of 3.91μm versus 3.34μm for the E-M1 III) due to its larger sensor. However, the E-M1 III is a much more recent model (by 3 years and 8 months) than the K-70, 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 neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the sensor resolves.

The resolution advantage of the Pentax K-70 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the K-70 for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the Olympus E-M1 III are 25.9 x 19.4 inches or 65.8 x 49.4 cm for good quality, 20.7 x 15.6 inches or 52.7 x 39.5 cm for very good quality, and 17.3 x 13 inches or 43.9 x 32.9 cm for excellent quality prints.

Both cameras have the capacity to capture high quality composite images by combining multiple shots after shifting the sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).

The Olympus OM-D E-M1 Mark III has a native sensitivity range from ISO 200 to ISO 25600, which can be extended to ISO 64-25600. The corresponding ISO settings for the Pentax K-70 are ISO 100 to ISO 102400 (no boost).

E-M1 III versus K-70 MP

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.

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Sensor Characteristics
    Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Olympus E-M1 III Four Thirds 20.2 5184 38884K/30p23.313.1135676
2.
 
Pentax K-70 APS-C 24.0 6000 40001080/60i23.813.1163980
3.
 
Olympus E-M10 IV Four Thirds 20.2 5184 38884K/30p23.313.2140276
4.
 
Olympus E-M5 III Four Thirds 20.2 5184 38884K/30p23.313.1132476
5.
 
Olympus E-M1X Four Thirds 20.2 5184 38884K/30p23.213.0125475
6.
 
Olympus E-M1 II Four Thirds 20.2 5184 38884K/30p23.712.8131280
7.
 
Olympus E-M1 Four Thirds 15.9 4608 34561080/30p23.012.775773
8.
 
Panasonic GH5 II Four Thirds 20.2 5184 38884K/60p23.713.1113679
9.
 
Panasonic G95 Four Thirds 20.2 5184 38884K/30p23.213.0127375
10.
 
Panasonic G9 Four Thirds 20.2 5184 38884K/60p23.112.8113874
11.
 
Panasonic GH5 Four Thirds 20.2 5184 38884K/60p23.913.080777
12.
 
Panasonic GX8 Four Thirds 20.2 5184 38884K/30p23.512.680675
13.
 
Pentax K-3 III APS-C 25.6 6192 41284K/30p24.213.7208385
14.
 
Pentax KP APS-C 24.1 6016 40001080/60i23.913.2169981
15.
 
Pentax K-S2 APS-C 20.0 5472 36481080/30p23.612.9151479
16.
 
Pentax K-3 II APS-C 24.1 6016 40001080/60i23.613.6110680
17.
 
Pentax K-50 APS-C 16.1 4928 32641080/30p23.713.0112079
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the E-M1 III provides a higher video resolution than the K-70. It can shoot video footage at 4K/30p, while the Pentax is limited to 1080/60i.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the E-M1 III has an electronic viewfinder (2360k dots), while the K-70 has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The viewfinders of both cameras offer the same field of view (100%), but the viewfinder of the E-M1 III has a higher magnification than the one of the K-70 (0.74x vs 0.63x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Olympus E-M1 III, the Pentax K-70, and comparable cameras.

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Core Features
    Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Olympus E-M1 III2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
2.
 
Pentax K-70optical n3.0 / 921 swivel n 1/6000s 6.0/s Y Y
3.
 
Olympus E-M10 IV2360 n3.0 / 1040 tilting Y 1/4000s 15.0/s Y Y
4.
 
Olympus E-M5 III2360 n3.0 / 1040 swivel Y 1/8000s 10.0/s n Y
5.
 
Olympus E-M1X2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
6.
 
Olympus E-M1 II2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
7.
 
Olympus E-M12360 n3.0 / 1037 tilting Y 1/8000s 10.0/s n Y
8.
 
Panasonic GH5 II3680 n3.0 / 1840 swivel Y 1/8000s 12.0/s n Y
9.
 
Panasonic G952360 n3.0 / 1240 swivel Y 1/4000s 9.0/s Y Y
10.
 
Panasonic G93680 Y3.0 / 1040 swivel Y 1/8000s 20.0/s n Y
11.
 
Panasonic GH53680 n3.2 / 1620 swivel Y 1/8000s 12.0/s n Y
12.
 
Panasonic GX82360 n3.0 / 1040 swivel Y 1/8000s 10.0/s n Y
13.
 
Pentax K-3 IIIoptical Y3.2 / 1620 fixed Y 1/8000s 12.0/s n Y
14.
 
Pentax KPoptical n3.0 / 921 tilting n 1/6000s 7.0/s Y Y
15.
 
Pentax K-S2optical n3.0 / 921 swivel n 1/6000s 5.4/s Y Y
16.
 
Pentax K-3 IIoptical Y3.2 / 1037 fixed n 1/8000s 8.3/s n Y
17.
 
Pentax K-50optical n3.0 / 921 fixed n 1/6000s 6.0/s Y Y
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The E-M1 III has a touchscreen, while the K-70 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

Both cameras have an articulated rear screen that can be turned to be front-facing. This feature will be particularly appreciated by vloggers and photographers who are interested in taking selfies.

The reported shutter speed information refers to the use of the mechanical shutter. Yet, some cameras only have an electronic shutter, while others have an electronic shutter in addition to a mechanical one. In fact, the E-M1 III is one of those camera that have an additional electronic shutter, which makes completely silent shooting possible. However, this mode is less suitable for photographing moving objects (risk of rolling shutter) or shooting under artificial light sources (risk of flickering).

The Olympus E-M1 III and the Pentax K-70 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 E-M1 III and the K-70 write their files to SDXC cards. The E-M1 III features dual card slots, which can be very useful in case a memory card fails. In contrast, the K-70 only has one slot. The E-M1 III supports UHS-II cards (on its first slot), while the K-70 can use UHS-I cards.

Connectivity comparison

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 OM-D E-M1 Mark III and Pentax K-70 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
    Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Olympus E-M1 IIIYstereo / monoYYmicro3.1Y-Y
2.
 
Pentax K-70Ystereo / monoY-mini2.0Y--
3.
 
Olympus E-M10 IVYstereo / mono--micro2.0Y-Y
4.
 
Olympus E-M5 IIIYstereo / monoY-micro2.0Y-Y
5.
 
Olympus E-M1XYstereo / monoYYmicro3.0Y-Y
6.
 
Olympus E-M1 IIYstereo / monoYYmicro3.0Y--
7.
 
Olympus E-M1Ystereo / monoY-micro2.0Y--
8.
 
Panasonic GH5 IIYstereo / monoYYfull3.2Y-Y
9.
 
Panasonic G95Ystereo / monoYYmicro2.0Y-Y
10.
 
Panasonic G9Ystereo / monoYYfull3.0Y-Y
11.
 
Panasonic GH5Ystereo / monoYYfull3.1Y-Y
12.
 
Panasonic GX8Ystereo / monoY-micro2.0YY-
13.
 
Pentax K-3 IIIYstereo / monoYYmicro3.2Y-Y
14.
 
Pentax KPYstereo / monoY--2.0Y--
15.
 
Pentax K-S2Ymono / monoY-micro2.0YY-
16.
 
Pentax K-3 IIYmono / monoYYmini3.0---
17.
 
Pentax K-50Ymono / mono--micro2.0---

It is notable that the E-M1 III has a headphone jack, which is not present on the K-70 This port makes it possible to attach external headphones and monitor the quality of sound during the recording process.

Studio photographers will appreciate that the Olympus E-M1 III (unlike the K-70) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the E-M1 III and the K-70 are recent models that are part of the current product line-up. The K-70 replaced the earlier Pentax K-50, while the E-M1 III followed on from the Olympus E-M1 II. 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.

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Review summary

So how do things add up? Which of the two cameras – the Olympus E-M1 III or the Pentax K-70 – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.

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Arguments in favor of the Olympus OM-D E-M1 Mark III:

  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.74x vs 0.63x).
  • More detailed LCD: Has a higher resolution rear screen (1037k vs 921k dots).
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/6000s) to freeze action.
  • Faster burst: Shoots at higher frequency (18 vs 6 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • Less heavy: Is lighter (by 108g or 16 percent) and hence easier to carry around.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • 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.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More modern: Reflects 3 years and 8 months of technical progress since the K-70 launch.

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Reasons to prefer the Pentax K-70:

  • More detail: Has more megapixels (24 vs 20.2MP), which boosts linear resolution by 11%.
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced into a lower priced category (64 percent cheaper at launch).
  • More heavily discounted: Has been around for much longer (launched in June 2016).

If the count of individual advantages (bullet points above) is taken as a guide, the E-M1 III is the clear winner of the match-up (18 : 5 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

E-M1 III 18:05 K-70

How about other alternatives? Do the specifications of the Olympus E-M1 III and the Pentax K-70 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the E-M1 III or the K-70. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.

Expert reviews

This is where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular 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.

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Expert Camera Reviews
     Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Olympus E-M1 III5/5..5/583/1004.5/54/5 Feb 2020 1,799 i
2.
 
Pentax K-704.5/5....79/1004.5/54.5/5 Jun 2016 649 i
3.
 
Olympus E-M10 IV4.5/5..5/581/1004.5/54.5/5 Aug 2020 699 i
4.
 
Olympus E-M5 III5/5+5/582/1004.5/54.5/5 Oct 2019 1,199 i
5.
 
Olympus E-M1X4.5/5o5/585/1004.5/5.. Jan 2019 2,999 i
6.
 
Olympus E-M1 II5/5+ +5/585/1004.5/54.5/5 Sep 2016 1,999 i
7.
 
Olympus E-M15/5+ +..84/1004.5/54.5/5 Sep 2013 1,399i
8.
 
Panasonic GH5 II4.5/5..4.5/585/1004.5/55/5 May 2021 1,699 i
9.
 
Panasonic G954.5/5+4.5/583/1004.5/54.5/5 Apr 2019 999 i
10.
 
Panasonic G9..+ +5/585/1005/55/5 Nov 2017 1,699 i
11.
 
Panasonic GH54.5/5+ +..85/1004.5/55/5 Jan 2017 1,999i
12.
 
Panasonic GX85/5+..82/1004.5/54.5/5 Jul 2015 1,199i
13.
 
Pentax K-3 III4/5..3/5..4.5/5.. Mar 2021 1,999 i
14.
 
Pentax KP4/5..3/582/1005/54.5/5 Jan 2017 1,099 i
15.
 
Pentax K-S24.5/5......5/54.5/5 Feb 2015 749 i
16.
 
Pentax K-3 II4.5/5......5/55/5 Apr 2015 1,099i
17.
 
Pentax K-505/5......5/54.5/5 Jun 2013 599i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.

Olympus E-M1 III:
Check current price at
i
Pentax K-70:
Check current price at
i

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.

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    Specifications: Olympus E-M1 III vs Pentax K-70

    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 Specifications
    Camera Model Olympus E-M1 III Pentax K-70
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Pentax K mount lenses
    Launch Date February 2020 June 2016
    Launch Price USD 1,799 USD 649
    Sensor Specs Olympus E-M1 III Pentax K-70
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor APS-C Sensor
    Sensor Size 17.3 x 13.0 mm 23.5 x 15.6 mm
    Sensor Area 224.9 mm2 366.6 mm2
    Sensor Diagonal 21.6 mm 28.2 mm
    Crop Factor 2.0x 1.5x
    Sensor Resolution 20.2 Megapixels 24 Megapixels
    Image Resolution 5184 x 3888 pixels 6000 x 4000 pixels
    Pixel Pitch 3.34 μm 3.91 μm
    Pixel Density 8.96 MP/cm2 6.55 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 4K/30p Video 1080/60i Video
    ISO Setting 200 - 25,600 ISO 100 - 102,400 ISO
    ISO Boost 64 - 25,600 ISO no Enhancement
    Image Processor TruePic IX PRIME MII
    Screen Specs Olympus E-M1 III Pentax K-70
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.74x 0.63x
    Viewfinder Resolution 2360k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1037k dots 921k dots
    LCD Attachment Swivel screen Swivel screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Olympus E-M1 III Pentax K-70
    Focus System On-Sensor Phase-detect Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/6000s
    Continuous Shooting 18 shutter flaps/s 6 shutter flaps/s
    Shutter Life Expectancy400 000 actuations100 000 actuations
    Electronic Shutterup to 1/32000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash Built-in Flash
    Storage Medium SDXC cards SDXC cards
    Second Storage Option Dual card slots Single card slot
    UHS card support Single UHS-II UHS-I
    Connectivity Specs Olympus E-M1 III Pentax K-70
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector USB 3.1 USB 2.0
    HDMI Port micro HDMI mini HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port no Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Bluetooth Support Bluetooth built-in no Bluetooth
    Body Specs Olympus E-M1 III Pentax K-70
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type BLH-1 D-LI109
    Battery Life (CIPA)420 shots per charge410 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 134 x 91 x 69 mm
    (5.3 x 3.6 x 2.7 in)
    126 x 93 x 74 mm
    (5.0 x 3.7 x 2.9 in)
    Camera Weight 580 g (20.5 oz) 688 g (24.3 oz)
    Olympus E-M1 III:
    Check current price at
    i
    Pentax K-70:
    Check current price at
    i

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