Olympus E-M10 III vs Nikon P900

The Olympus OM-D E-M10 Mark III and the Nikon Coolpix P900 are two digital cameras that were revealed to the public, respectively, in August 2017 and March 2015. The E-M10 III is a mirrorless interchangeable lens camera, while the P900 is a fixed lens compact. The cameras are based on a Four Thirds (E-M10 III) and a 1/2.3-inch (P900) sensor. Both cameras offer a resolution of 15.9 megapixels.

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

Headline Specifications

Olympus E-M10 III		Nikon P900
Mirrorless system camera		Fixed lens compact camera
Micro Four Thirds lenses		24-2000mm f/2.8-6.5
15.9 MP – Four Thirds sensor		15.9 MP – 1/2.3" sensor
4K/30p Video		1080/60p Video
ISO 200-25,600		ISO 100-6,400 (100 - 12,800)
Electronic viewfinder (2360k dots)		Electronic viewfinder (921k dots)
3.0" LCD – 1040k dots		3.0" LCD – 921k dots
Tilting touchscreen		Swivel screen (not touch-sensitive)
8.6 shutter flaps per second		7 shutter flaps per second
In-body stabilization		Lens-based stabilization
330 shots per battery charge		360 shots per battery charge
122 x 84 x 50 mm, 410 g		140 x 103 x 137 mm, 899 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus OM-D E-M10 Mark III and the Nikon Coolpix P900? 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-M10 III and the Nikon P900 are illustrated in the side-by-side display below. 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 measures are rounded to the nearest millimeter.

The E-M10 III can be obtained in two different colors (black, silver), while the P900 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 Nikon P900 is notably larger (41 percent) than the Olympus E-M10 III. In this context, it is worth noting that neither the E-M10 III nor the P900 are weather-sealed.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the P900 has a lens built in, whereas the E-M10 III is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the E-M10 III and their specifications in the Micro Four Thirds Lens Catalog.

Concerning battery life, the E-M10 III gets 330 shots out of its Olympus BLS-50 battery, while the P900 can take 360 images on a single charge of its Nikon EN-EL23 power pack. The power pack in the P900 can be charged via the USB port, which can be very convenient 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.

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-M10 III	122 mm	84 mm	50 mm	410 g	330	n	Aug 2017	649	ebay.com
2.		Nikon P900	140 mm	103 mm	137 mm	899 g	360	n	Mar 2015	599	ebay.com
3.		Nikon B500	114 mm	78 mm	95 mm	541 g	600	n	Jan 2016	299	ebay.com
4.		Nikon B700	125 mm	85 mm	107 mm	565 g	350	n	Feb 2016	499	ebay.com
5.		Nikon L840	113 mm	78 mm	96 mm	538 g	590	n	Feb 2015	299	ebay.com
6.		Nikon P950	140 mm	110 mm	150 mm	1005 g	290	n	Jan 2020	799	amazon.com
7.		Nikon P1000	146 mm	119 mm	181 mm	1415 g	250	n	Jul 2018	999	amazon.com
8.		Olympus E-M10	119 mm	82 mm	46 mm	396 g	320	n	Jan 2014	699	ebay.com
9.		Olympus E-M10 II	120 mm	83 mm	47 mm	390 g	320	n	Aug 2015	649	ebay.com
10.		Olympus E-M10 IV	122 mm	84 mm	49 mm	383 g	360	n	Aug 2020	699	amazon.com
11.		Olympus E-PL6	111 mm	64 mm	38 mm	325 g	360	n	May 2013	599	ebay.com
12.		Olympus E-PL7	115 mm	67 mm	38 mm	357 g	350	n	Aug 2014	599	ebay.com
13.		Olympus E-PL8	115 mm	67 mm	38 mm	357 g	350	n	Sep 2016	549	ebay.com
14.		Olympus E-PL9	117 mm	68 mm	39 mm	380 g	350	n	Feb 2018	599	ebay.com
15.		Olympus E-PL10	117 mm	68 mm	39 mm	380 g	350	n	Oct 2019	599	ebay.com
16.		Olympus PEN-F	125 mm	72 mm	37 mm	427 g	330	n	Jan 2016	1,199	ebay.com
17.		Panasonic GX85	122 mm	71 mm	44 mm	426 g	290	n	Apr 2016	799	amazon.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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The price is, of course, an important factor in any camera decision. 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 P900 was launched at a lower price than the E-M10 III, despite having a lens built in. 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.

Sensor comparison

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. 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-M10 III features a Four Thirds sensor and the Nikon P900 a 1/2.3-inch sensor. The sensor area in the P900 is 88 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 5.6. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Even though the E-M10 III has a larger sensor, both cameras offer the same resolution of 15.9 megapixels. This implies that the E-M10 III has a lower pixel density and larger individual pixels (with a pixel pitch of 3.76μm versus 1.33μm for the P900), which gives it a potential advantage in terms of light gathering capacity. In addition, the E-M10 III is much more recent (by 2 years and 6 months) than the P900, and its sensor will have benefitted from technological advances during this time. 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 Olympus OM-D E-M10 Mark III has a native sensitivity range from ISO 200 to ISO 25600, which can be extended to ISO 100-25600. The corresponding ISO settings for the Nikon Coolpix P900 are ISO 100 to ISO 6400, with the possibility to increase the ISO range to 100-12800.

In terms of underlying technology, the E-M10 III is build around a CMOS sensor, while the P900 uses a BSI-CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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-M10 III	Four Thirds	15.9	4608	3456	4K/30p	23.1	12.8	1120	74
2.		Nikon P900	1/2.3	15.9	4608	3456	1080/60p	20.2	11.6	727	47
3.		Nikon B500	1/2.3	15.9	4608	3456	1080/60i	20.3	11.7	810	48
4.		Nikon B700	1/2.3	20.2	5184	3888	4K/30p	20.4	11.8	818	48
5.		Nikon L840	1/2.3	15.9	4608	3456	1080/60i	20.2	11.6	721	47
6.		Nikon P950	1/2.3	15.9	4608	3456	4K/30p	20.7	12.3	1189	52
7.		Nikon P1000	1/2.3	15.9	4608	3456	4K/30p	20.6	12.1	1044	51
8.		Olympus E-M10	Four Thirds	15.9	4608	3456	1080/30p	22.8	12.3	884	72
9.		Olympus E-M10 II	Four Thirds	15.9	4608	3456	1080/60p	23.1	12.5	842	73
10.		Olympus E-M10 IV	Four Thirds	20.2	5184	3888	4K/30p	23.3	13.2	1402	76
11.		Olympus E-PL6	Four Thirds	15.9	4608	3456	1080/30p	22.5	12.0	717	68
12.		Olympus E-PL7	Four Thirds	15.9	4608	3456	1080/30p	22.7	12.4	873	72
13.		Olympus E-PL8	Four Thirds	15.9	4608	3456	1080/30p	23.0	12.6	1030	73
14.		Olympus E-PL9	Four Thirds	15.9	4608	3456	4K/30p	23.1	12.8	1162	74
15.		Olympus E-PL10	Four Thirds	15.9	4608	3456	4K/30p	23.3	13.1	1324	76
16.		Olympus PEN-F	Four Thirds	20.2	5184	3888	1080/60p	23.1	12.4	894	74
17.		Panasonic GX85	Four Thirds	15.8	4592	3448	4K/30p	22.9	12.6	662	71
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-M10 III provides a higher video resolution than the P900. It can shoot video footage at 4K/30p, while the Nikon is limited to 1080/60p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the E-M10 III offers a substantially higher resolution than the one in the P900 (2360k vs 921k dots). The table below summarizes some of the other core capabilities of the Olympus E-M10 III and Nikon P900 in connection with corresponding information for a sample of similar cameras.

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-M10 III	2360	n	3.0 / 1040	tilting	Y	1/4000s	8.6/s	Y	Y
2.		Nikon P900	921	n	3.0 / 921	swivel	n	1/4000s	7.0/s	Y	Y
3.		Nikon B500	none	n	3.0 / 921	tilting	n	1/4000s	7.4/s	Y	Y
4.		Nikon B700	921	n	3.0 / 921	swivel	n	1/4000s	5.0/s	Y	Y
5.		Nikon L840	none	n	3.0 / 921	tilting	n	1/4000s	7.4/s	Y	Y
6.		Nikon P950	2359	n	3.2 / 921	swivel	n	1/4000s	7.0/s	Y	Y
7.		Nikon P1000	2359	n	3.2 / 921	swivel	n	1/4000s	7.0/s	Y	Y
8.		Olympus E-M10	1440	n	3.0 / 1037	tilting	Y	1/4000s	8.0/s	Y	Y
9.		Olympus E-M10 II	2360	n	3.0 / 1040	tilting	Y	1/4000s	8.0/s	Y	Y
10.		Olympus E-M10 IV	2360	n	3.0 / 1040	tilting	Y	1/4000s	15.0/s	Y	Y
11.		Olympus E-PL6	optional	n	3.0 / 460	tilting	Y	1/4000s	8.0/s	n	Y
12.		Olympus E-PL7	optional	n	3.0 / 1037	tilting	Y	1/4000s	8.0/s	n	Y
13.		Olympus E-PL8	optional	n	3.0 / 1037	tilting	Y	1/4000s	8.0/s	n	Y
14.		Olympus E-PL9	none	n	3.0 / 1040	tilting	Y	1/4000s	8.6/s	Y	Y
15.		Olympus E-PL10	none	n	3.0 / 1040	tilting	Y	1/4000s	8.6/s	Y	Y
16.		Olympus PEN-F	2360	n	3.0 / 1037	swivel	Y	1/8000s	10.0/s	n	Y
17.		Panasonic GX85	2765	n	3.0 / 1040	tilting	Y	1/4000s	8.0/s	Y	Y
Note: *) 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-M10 III has a touchscreen, while the P900 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

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-M10 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-M10 III and the Nikon P900 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-M10 III and the P900 write their files to SDXC cards. The E-M10 III supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s), while the P900 cannot take advantage of Ultra High Speed SD 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-M10 Mark III and Nikon Coolpix P900 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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-M10 III	Y	stereo / mono	-	-	micro	2.0	Y	-	-
2.		Nikon P900	-	stereo / mono	-	-	micro	2.0	Y	Y	-
3.		Nikon B500	-	stereo / mono	-	-	micro	2.0	Y	Y	Y
4.		Nikon B700	-	stereo / mono	-	-	micro	2.0	Y	Y	Y
5.		Nikon L840	-	stereo / mono	-	-	micro	2.0	Y	Y	-
6.		Nikon P950	Y	stereo / mono	Y	-	micro	2.0	Y	-	Y
7.		Nikon P1000	Y	stereo / mono	Y	-	micro	2.0	Y	-	Y
8.		Olympus E-M10	Y	stereo / mono	-	-	micro	2.0	Y	-	-
9.		Olympus E-M10 II	Y	stereo / mono	-	-	micro	2.0	Y	-	-
10.		Olympus E-M10 IV	Y	stereo / mono	-	-	micro	2.0	Y	-	Y
11.		Olympus E-PL6	Y	stereo / mono	-	-	mini	2.0	-	-	-
12.		Olympus E-PL7	Y	stereo / mono	-	-	micro	2.0	Y	-	-
13.		Olympus E-PL8	Y	stereo / mono	-	-	micro	2.0	Y	-	-
14.		Olympus E-PL9	Y	stereo / mono	-	-	micro	2.0	Y	-	Y
15.		Olympus E-PL10	Y	stereo / mono	-	-	micro	2.0	Y	-	Y
16.		Olympus PEN-F	Y	stereo / mono	-	-	micro	2.0	Y	-	-
17.		Panasonic GX85	Y	stereo / mono	-	-	micro	2.0	Y	-	-

It is notable that the E-M10 III has a hotshoe, while the P900 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.

Travel and landscape photographers will find it useful that the P900 has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

Both the E-M10 III and the P900 have been discontinued, but can regularly be found used on ebay. The P900 was replaced by the Nikon P950, while the E-M10 III was followed by the Olympus E-M10 IV. Further information on the features and operation of the E-M10 III and P900 can be found, respectively, in the Olympus E-M10 III Manual (free pdf) or the online Nikon P900 Manual.

Review summary

So what conclusions can be drawn? Is the Olympus E-M10 III better than the Nikon P900 or vice versa? Below is a summary of the relative strengths of each of the two contestants.

Reasons to prefer the Olympus OM-D E-M10 Mark III:

• Better image quality: Features a larger and more technologically advanced imaging sensor.
• Richer colors: The sensor size advantage translates into images with better, more accurate colors.
• More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
• Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
• Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
• More detailed viewfinder: Has higher resolution electronic viewfinder (2360k vs 921k dots).
• More detailed LCD: Has a higher resolution rear screen (1040k vs 921k dots).
• Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
• Faster burst: Shoots at higher frequency (8.6 vs 7 flaps/sec) to capture the decisive moment.
• Less disturbing: Has an electronic shutter option for completely silent shooting.
• More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
• More compact: Is smaller (122x84mm vs 140x103mm) and thus needs less room in the bag.
• Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
• Faster buffer clearing: Supports Ultra High Speed (UHS-II) SDXC cards.
• More modern: Reflects 2 years and 6 months of technical progress since the P900 launch.

Advantages of the Nikon Coolpix P900:

• More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
• More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
• Ready to shoot: Has an integrated lens, whereas the E-M10 III necessitates an extra lens.
• Easier travel charging: Can be conveniently charged via its USB port.
• Easier geotagging: Features an internal GPS sensor to log localization data.
• Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
• More affordable: Was introduced at a lower price, despite coming with a built-in lens.
• More heavily discounted: Has been around for much longer (launched in March 2015).

If the count of individual advantages (bullet points above) is taken as a guide, the E-M10 III is the clear winner of the match-up (15 : 8 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 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 E-M10 III and the Nikon P900 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best Superzoom Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the E-M10 III or the P900. 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 why hands-on reviews by experts are important. 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.

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-M10 III	..	+	5/5	80/100	4.5/5	4.5/5	Aug 2017	649	ebay.com
2.		Nikon P900	..	..	..	77/100	4/5	4/5	Mar 2015	599	ebay.com
3.		Nikon B500	..	+	..	..	4/5	3.5/5	Jan 2016	299	ebay.com
4.		Nikon B700	..	+	..	..	4/5	4/5	Feb 2016	499	ebay.com
5.		Nikon L840	..	+ +	..	..	3.5/5	4/5	Feb 2015	299	ebay.com
6.		Nikon P950	..	..	3/5	..	4/5	4/5	Jan 2020	799	amazon.com
7.		Nikon P1000	..	+	3.5/5	73/100	3.5/5	3.5/5	Jul 2018	999	amazon.com
8.		Olympus E-M10	4/5	..	..	80/100	5/5	5/5	Jan 2014	699	ebay.com
9.		Olympus E-M10 II	4.5/5	+ +	..	80/100	5/5	5/5	Aug 2015	649	ebay.com
10.		Olympus E-M10 IV	4.5/5	..	5/5	81/100	4.5/5	4.5/5	Aug 2020	699	amazon.com
11.		Olympus E-PL6	..	..	..	..	..	..	May 2013	599	ebay.com
12.		Olympus E-PL7	4/5	+	..	..	5/5	4/5	Aug 2014	599	ebay.com
13.		Olympus E-PL8	..	..	..	..	4.5/5	4/5	Sep 2016	549	ebay.com
14.		Olympus E-PL9	..	+	..	..	4.5/5	4/5	Feb 2018	599	ebay.com
15.		Olympus E-PL10	..	..	4/5	77/100	..	4/5	Oct 2019	599	ebay.com
16.		Olympus PEN-F	..	..	4/5	82/100	4.5/5	5/5	Jan 2016	1,199	ebay.com
17.		Panasonic GX85	4.5/5	+ +	..	82/100	5/5	5/5	Apr 2016	799	amazon.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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

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Other camera comparisons

Did this review help to inform your camera decision process? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. 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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