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Olympus E-M1 II vs Nikon D4S

The Olympus OM-D E-M1 Mark II and the Nikon D4S are two digital cameras that were revealed to the public, respectively, in September 2016 and February 2014. The E-M1 II is a mirrorless interchangeable lens camera, while the D4S is a DSLR. The cameras are based on a Four Thirds (E-M1 II) and a full frame (D4S) sensor. The Olympus has a resolution of 20.2 megapixels, whereas the Nikon provides 16.2 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 II
versus
Nikon D4S
Olympus E-M1 II   Nikon D4S
Mirrorless system camera Digital single lens reflex
Micro Four Thirds lenses Nikon F mount lenses
20.2 MP – Four Thirds sensor 16.2 MP – Full Frame sensor
4K/30p Video 1080/60p Video
ISO 200-25,600 ISO 100-25,600 (50 - 409,600)
Electronic viewfinder (2360k dots) Optical viewfinder
3.0" LCD – 1037k dots 3.2" LCD – 921k dots
Swivel touchscreen Fixed screen (not touch-sensitive)
18 shutter flaps per second 11 shutter flaps per second
In-body stabilizationLens stabilization only
Weathersealed bodyWeathersealed body
440 shots per battery charge3020 shots per battery charge
134 x 91 x 67 mm, 574 g 160 x 157 x 91 mm, 1350 g
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Check E-M1 II offers at
ebay.com
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Check D4S offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus OM-D E-M1 Mark II and the Nikon D4S? 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.

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Body comparison

An illustration of the physical size and weight of the Olympus E-M1 II and the Nikon D4S is provided 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 size dimensions are rounded to the nearest millimeter.

Size Olympus E-M1 II vs Nikon D4S
Compare E-M1 II versus D4S top
Comparison E-M1 II or D4S rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D4S is considerably larger (106 percent) than the Olympus E-M1 II. Moreover, the D4S is substantially heavier (135 percent) than the E-M1 II. 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. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Micro Four Thirds Lens Catalog (E-M1 II) and the Nikon Lens Catalog (D4S). Mirrorless cameras, such as the Olympus E-M1 II, have moreover the advantage that they have a relatively short flange to focal plane distance and can thus use many lenses from other systems via adapters.

Concerning battery life, the E-M1 II gets 440 shots out of its Olympus BLH-1 battery, while the D4S can take 3020 images on a single charge of its Nikon EN-EL18a power pack. As can be seen in the images above, the D4S has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power. In order to provide similar functionality for the E-M1 II, Olympus provides the HLD-9 vertical grip as an optional accessory (see here on ebay).

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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
  empty 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 II 134 mm 91 mm 67 mm 574 g 440 Y Sep 2016 1,999ebay.com
2.
 
Nikon D4S 160 mm 157 mm 91 mm 1350 g 3020 Y Feb 2014 6,499ebay.com
3.
 
Nikon D4 160 mm 157 mm 91 mm 1340 g 2600 Y Jan 2012 5,999ebay.com
4.
 
Nikon D5 160 mm 159 mm 92 mm 1415 g 3780 Y Jan 2016 6,499ebay.com
5.
 
Nikon D750 141 mm 113 mm 78 mm 750 g 1230 Y Sep 2014 2,299ebay.com
6.
 
Nikon D810 146 mm 123 mm 82 mm 980 g 1200 Y Jun 2014 3,299ebay.com
7.
 
Nikon Df 144 mm 110 mm 67 mm 760 g 1400 Y Nov 2013 2,749ebay.com
8.
 
Olympus E-M1 130 mm 94 mm 63 mm 497 g 350 Y Sep 2013 1,399ebay.com
9.
 
Olympus E-M1 III 134 mm 91 mm 69 mm 580 g 420 Y Feb 2020 1,799ebay.com
10.
 
Olympus PEN-F 125 mm 72 mm 37 mm 427 g 330 n Jan 2016 1,199ebay.com
11.
 
OM System OM-1 135 mm 92 mm 73 mm 599 g 520 Y Feb 2022 2,199ebay.com
12.
 
OM System OM-1 II 135 mm 92 mm 73 mm 599 g 500 Y Jan 2024 2,399 amazon.com
13.
 
Panasonic G9 137 mm 97 mm 92 mm 658 g 400 Y Nov 2017 1,699ebay.com
14.
 
Panasonic G85 128 mm 89 mm 74 mm 505 g 330 Y Sep 2016 899ebay.com
15.
 
Panasonic GH5 139 mm 98 mm 87 mm 725 g 410 Y Jan 2017 1,999ebay.com
16.
 
Panasonic GH5 II 139 mm 98 mm 87 mm 727 g 400 Y May 2021 1,699 amazon.com
17.
 
Panasonic GX8 133 mm 78 mm 63 mm 487 g 330 Y Jul 2015 1,199ebay.com
Note: 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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The E-M1 II was launched at a markedly lower price (by 69 percent) than the D4S, which puts it into a different market segment. 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. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Olympus E-M1 II features a Four Thirds sensor and the Nikon D4S a full frame sensor. The sensor area in the D4S is 282 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.0. The sensor in the E-M1 II has a native 4:3 aspect ratio, while the one in the D4S offers a 3:2 aspect.

Olympus E-M1 II and Nikon D4S sensor measures

Despite having a smaller sensor, the Olympus E-M1 II offers a higher resolution of 20.2 megapixels, compared with 16.2 MP of the Nikon D4S. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.34μm versus 7.29μm for the D4S). However, it should be noted that the E-M1 II is much more recent (by 2 years and 6 months) than the D4S, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that the E-M1 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Olympus E-M1 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-M1 II for good quality output (200 dots per inch) amounts to 25.9 x 19.4 inches or 65.8 x 49.4 cm, for very good quality (250 dpi) 20.7 x 15.6 inches or 52.7 x 39.5 cm, and for excellent quality (300 dpi) 17.3 x 13 inches or 43.9 x 32.9 cm. The corresponding values for the Nikon D4S are 24.6 x 16.4 inches or 62.6 x 41.7 cm for good quality, 19.7 x 13.1 inches or 50.1 x 33.3 cm for very good quality, and 16.4 x 10.9 inches or 41.7 x 27.8 cm for excellent quality prints.

The E-M1 II has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

Unlike the D4S, the E-M1 II has the capacity to capture high quality composite images (50MP) by combining multiple shots after shifting its 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 II 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 Nikon D4S are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-409600.

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

E-M1 II versus D4S MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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"). Of the two cameras under consideration, the D4S has a markedly higher DXO score than the E-M1 II (overall score 9 points higher), which will translate into better image quality. The advantage is based on 0.7 bits higher color depth, 0.5 EV in additional dynamic range, and 1.2 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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Sensor Characteristics
  empty Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Olympus E-M1 II Four Thirds 20.2 5184 38884K/30p23.712.8131280
2.
 
Nikon D4S Full Frame 16.2 4928 32801080/60p24.413.3307489
3.
 
Nikon D4 Full Frame 16.2 4928 32801080/30p24.713.1296589
4.
 
Nikon D5 Full Frame 20.7 5588 37124K/30p25.112.3234388
5.
 
Nikon D750 Full Frame 24.2 6016 40161080/60p24.814.5295693
6.
 
Nikon D810 Full Frame 36.2 7360 49121080/60p25.714.8285397
7.
 
Nikon Df Full Frame 16.2 4928 3280none24.613.1327989
8.
 
Olympus E-M1 Four Thirds 15.9 4608 34561080/30p23.012.775773
9.
 
Olympus E-M1 III Four Thirds 20.2 5184 38884K/30p23.313.1135676
10.
 
Olympus PEN-F Four Thirds 20.2 5184 38881080/60p23.112.489474
11.
 
OM System OM-1 Four Thirds 20.2 5184 38884K/60p23.413.4155377
12.
 
OM System OM-1 II Four Thirds 20.2 5184 38884K/60p23.413.6174978
13.
 
Panasonic G9 Four Thirds 20.2 5184 38884K/60p23.112.8113874
14.
 
Panasonic G85 Four Thirds 15.8 4592 34484K/30p22.812.565671
15.
 
Panasonic GH5 Four Thirds 20.2 5184 38884K/60p23.913.080777
16.
 
Panasonic GH5 II Four Thirds 20.2 5184 38884K/60p23.713.1113679
17.
 
Panasonic GX8 Four Thirds 20.2 5184 38884K/30p23.512.680675
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. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the E-M1 II provides a higher video resolution than the D4S. It can shoot video footage at 4K/30p, while the Nikon is limited to 1080/60p.

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Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the E-M1 II has an electronic viewfinder (2360k dots), while the D4S 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 II has a higher magnification than the one of the D4S (0.74x vs 0.70x), 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 II, the Nikon D4S, and comparable cameras.

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Core Features
  empty 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 II2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
2.
 
Nikon D4Soptical Y3.2 / 921 fixed n 1/8000s 11.0/s n n
3.
 
Nikon D4optical Y3.2 / 921 fixed n 1/8000s 11.0/s n n
4.
 
Nikon D5optical Y3.2 / 2359 fixed Y 1/8000s 14.0/s n n
5.
 
Nikon D750optical Y3.2 / 1229 tilting n 1/4000s 6.0/s Y n
6.
 
Nikon D810optical Y3.2 / 1229 fixed n 1/8000s 5.0/s Y n
7.
 
Nikon Dfoptical Y3.2 / 921 fixed n 1/4000s 5.5/s n n
8.
 
Olympus E-M12360 n3.0 / 1037 tilting Y 1/8000s 10.0/s n Y
9.
 
Olympus E-M1 III2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
10.
 
Olympus PEN-F2360 n3.0 / 1037 swivel Y 1/8000s 10.0/s n Y
11.
 
OM System OM-15760 n3.0 / 1640 swivel Y 1/8000s 10.0/s n Y
12.
 
OM System OM-1 II5760 n3.0 / 1640 swivel Y 1/8000s 10.0/s n Y
13.
 
Panasonic G93680 Y3.0 / 1040 swivel Y 1/8000s 20.0/s n Y
14.
 
Panasonic G852360 n3.0 / 1040 swivel Y 1/4000s 9.0/s Y Y
15.
 
Panasonic GH53680 n3.2 / 1620 swivel Y 1/8000s 12.0/s n Y
16.
 
Panasonic GH5 II3680 n3.0 / 1840 swivel Y 1/8000s 12.0/s n Y
17.
 
Panasonic GX82360 n3.0 / 1040 swivel Y 1/8000s 10.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that differentiates the E-M1 II and the D4S is in-body image stabilization (IBIS). The E-M1 II reduces the risk of handshake-induced blur with all attached lenses, while the D4S offers no blur reduction with lenses that themselves do not provide optical image stabilization.

The E-M1 II has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the D4S does not have a selfie-screen.

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 II 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 II and the Nikon D4S 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.

The E-M1 II writes its imaging data to SDXC cards, while the D4S uses Compact Flash or XQD cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.

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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 II and Nikon D4S and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  empty 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 IIYstereo / monoYYmicro3.0Y--
2.
 
Nikon D4SYmono / monoYYmini2.0---
3.
 
Nikon D4Ymono / monoYYmicro2.0---
4.
 
Nikon D5Ystereo / monoYYmini3.0---
5.
 
Nikon D750Ystereo / monoYYmini2.0Y--
6.
 
Nikon D810Ystereo / monoYYmini3.0Y--
7.
 
Nikon DfY- / ---mini2.0---
8.
 
Olympus E-M1Ystereo / monoY-micro2.0Y--
9.
 
Olympus E-M1 IIIYstereo / monoYYmicro3.1Y-Y
10.
 
Olympus PEN-FYstereo / mono--micro2.0Y--
11.
 
OM System OM-1Ystereo / monoYYmicro3.0Y-Y
12.
 
OM System OM-1 IIYstereo / monoYYmicro3.0Y-Y
13.
 
Panasonic G9Ystereo / monoYYfull3.0Y-Y
14.
 
Panasonic G85Ystereo / monoY-micro2.0Y--
15.
 
Panasonic GH5Ystereo / monoYYfull3.1Y-Y
16.
 
Panasonic GH5 IIYstereo / monoYYfull3.2Y-Y
17.
 
Panasonic GX8Ystereo / monoY-micro2.0YY-

It is notable that the E-M1 II offers wifi support, while the D4S does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

Both the E-M1 II and the D4S have been discontinued, but can regularly be found used on ebay. The D4S was replaced by the Nikon D5, while the E-M1 II was followed by the Olympus E-M1 III. Further information on the features and operation of the E-M1 II and D4S can be found, respectively, in the Olympus E-M1 II Manual (free pdf) or the online Nikon D4S Manual.

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Review summary

So how do things add up? Which of the two cameras – the Olympus E-M1 II or the Nikon D4S – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

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

  • More detail: Offers more megapixels (20.2 vs 16.2MP) with a 9% higher linear resolution.
  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • High quality composites: Can combine several shots after pixel-shifting its sensor.
  • Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • More framing info: Has an electronic viewfinder that displays shooting data.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.74x vs 0.70x).
  • More detailed LCD: Has a higher resolution rear screen (1037k vs 921k dots).
  • More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
  • Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (18 vs 11 flaps/sec) to capture the decisive moment.
  • Less disturbing: Has an electronic shutter option for completely silent shooting.
  • More compact: Is smaller (134x91mm vs 160x157mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 776g or 57 percent) and hence easier to carry around.
  • Sharper images: Has hand-shake reducing image stabilization built-in.
  • More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • More affordable: Was introduced into a lower priced category (69 percent cheaper at launch).
  • More modern: Reflects 2 years and 6 months of technical progress since the D4S launch.

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Advantages of the Nikon D4S:

  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better image quality: Scores markedly higher (9 points) in the DXO overall evaluation.
  • Better low-light sensitivity: Can shoot in dim conditions (1.2 stops ISO advantage).
  • Brighter framing: Features an optical viewfinder for clear, lag-free composition.
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
  • Longer lasting: Gets more shots (3020 versus 440) out of a single battery charge.
  • More heavily discounted: Has been around for much longer (launched in February 2014).

If the number of relative strengths (bullet points above) is taken as a guide, the E-M1 II is the clear winner of the match-up (21 : 9 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.

E-M1 II 21:09 D4S

How about other alternatives? Do the specifications of the Olympus E-M1 II and the Nikon D4S 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 comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it says little about, for example, the shooting experience and imaging performance of the E-M1 II and the D4S in practical situations. 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 table below provides a synthesis of the camera assessments of some of the best known photo-gear 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
  empty  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 II5/5+ +5/585/1004.5/54.5/5 Sep 2016 1,999ebay.com
2.
 
Nikon D4S5/5......4.5/54.5/5 Feb 2014 6,499ebay.com
3.
 
Nikon D4........4.5/54.5/5 Jan 2012 5,999ebay.com
4.
 
Nikon D5....4/589/1004.5/55/5 Jan 2016 6,499ebay.com
5.
 
Nikon D7505/5+ +4/590/1004.5/54.5/5 Sep 2014 2,299ebay.com
6.
 
Nikon D8105/5..5/586/1005/54.5/5 Jun 2014 3,299ebay.com
7.
 
Nikon Df4/5....81/1004/54/5 Nov 2013 2,749ebay.com
8.
 
Olympus E-M15/5+ +..84/1004.5/54.5/5 Sep 2013 1,399ebay.com
9.
 
Olympus E-M1 III5/5..5/583/1004.5/54/5 Feb 2020 1,799ebay.com
10.
 
Olympus PEN-F....4/582/1004.5/55/5 Jan 2016 1,199ebay.com
11.
 
OM System OM-15/5....87/1005/54.5/5 Feb 2022 2,199ebay.com
12.
 
OM System OM-1 II............ Jan 2024 2,399 amazon.com
13.
 
Panasonic G9..+ +5/585/1005/55/5 Nov 2017 1,699ebay.com
14.
 
Panasonic G85..+ +..84/1005/54.5/5 Sep 2016 899ebay.com
15.
 
Panasonic GH54.5/5+ +..85/1004.5/55/5 Jan 2017 1,999ebay.com
16.
 
Panasonic GH5 II4.5/5..4.5/585/1004.5/55/5 May 2021 1,699 amazon.com
17.
 
Panasonic GX85/5+..82/1004.5/54.5/5 Jul 2015 1,199ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. Also, please note that some of the review sites have changed their methodology and reporting over time.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Olympus E-M1 II vs Nikon D4S

    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 II Nikon D4S
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Micro Four Thirds lenses Nikon F mount lenses
    Launch Date September 2016 February 2014
    Launch Price USD 1,999 USD 6,499
    Sensor Specs Olympus E-M1 II Nikon D4S
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor Full Frame Sensor
    Sensor Size 17.3 x 13.0 mm 36.0 x 23.9 mm
    Sensor Area 224.9 mm2 860.4 mm2
    Sensor Diagonal 21.6 mm 43.2 mm
    Crop Factor 2.0x 1.0x
    Sensor Resolution 20.2 Megapixels 16.2 Megapixels
    Image Resolution 5184 x 3888 pixels 4928 x 3280 pixels
    Pixel Pitch 3.34 μm 7.29 μm
    Pixel Density 8.96 MP/cm2 1.88 MP/cm2
    Moiré control no AA filter Anti-Alias filter
    Movie Capability 4K/30p Video 1080/60p Video
    ISO Setting 200 - 25,600 ISO 100 - 25,600 ISO
    ISO Boost 64 - 25,600 ISO 50 - 409,600 ISO
    Image Processor TruePic VIII EXPEED 4
    DXO Sensor Quality (score) 80 89
    DXO Color Depth (bits) 23.7 24.4
    DXO Dynamic Range (EV) 12.8 13.3
    DXO Low Light (ISO) 1312 3074
    Screen Specs Olympus E-M1 II Nikon D4S
    Viewfinder Type Electronic viewfinder Optical viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.74x 0.70x
    Viewfinder Resolution 2360k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.2inch
    LCD Resolution 1037k dots 921k dots
    LCD Attachment Swivel screen Fixed screen
    Touch Input Touchscreen no Touchscreen
    Shooting Specs Olympus E-M1 II Nikon D4S
    Focus System On-Sensor Phase-detect Phase-detect AF
    Manual Focusing AidFocus Peakingno Peaking Feature
    Continuous Shooting 18 shutter flaps/s 11 shutter flaps/s
    Shutter Life Expectancy200 000 actuations400 000 actuations
    Electronic Shutterup to 1/32000sno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inIntervalometer built-in
    Image StabilizationIn-body stabilizationLens stabilization only
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium SDXC cards CF or XQD cards
    Single or Dual Card Slots Dual card slots Dual card slots
    Connectivity Specs Olympus E-M1 II Nikon D4S
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 3.0 USB 2.0
    HDMI Port micro HDMI mini HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port Headphone port
    Wifi Support Wifi built-in no Wifi
    Body Specs Olympus E-M1 II Nikon D4S
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Olympus BLH-1 Nikon EN-EL18a
    Battery Life (CIPA)440 shots per charge3020 shots per charge
    Body Dimensions 134 x 91 x 67 mm
    (5.3 x 3.6 x 2.6 in)
    160 x 157 x 91 mm
    (6.3 x 6.2 x 3.6 in)
    Camera Weight 574 g (20.2 oz) 1350 g (47.6 oz)
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