Nikon D810 vs Olympus E-420

The Nikon D810 and the Olympus E-420 are two digital cameras that were announced, respectively, in June 2014 and March 2008. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a full frame (D810) and a Four Thirds (E-420) sensor. The Nikon has a resolution of 36.2 megapixels, whereas the Olympus provides 10 MP.

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

Headline Specifications

Nikon D810		Olympus E-420
Digital single lens reflex		Digital single lens reflex
Nikon F mount lenses		Four Thirds lenses
36.2 MP – Full Frame sensor		10 MP – Four Thirds sensor
1080/60p Video		no Video
ISO 64-12,800 (32 - 51,200)		ISO 100-1,600
Optical viewfinder		Optical viewfinder
3.2" LCD – 1229k dots		2.7" LCD – 215k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
5 shutter flaps per second		3.5 shutter flaps per second
Weathersealed body		not weather sealed
1200 shots per battery charge		500 shots per battery charge
146 x 123 x 82 mm, 980 g		130 x 91 x 53 mm, 440 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D810 and the Olympus E-420? 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

An illustration of the physical size and weight of the Nikon D810 and the Olympus E-420 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth measures are rounded to the nearest millimeter.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Olympus E-420 is considerably smaller (34 percent) than the Nikon D810. Moreover, the E-420 is substantially lighter (55 percent) than the D810. It is worth mentioning in this context that the D810 is splash and dust resistant, while the E-420 does not feature any corresponding weather-sealing.

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 Nikon Lens Catalog (D810) and the Four Thirds Lens Catalog (E-420).

Concerning battery life, the D810 gets 1200 shots out of its Nikon EN-EL15 battery, while the E-420 can take 500 images on a single charge of its Olympus BLS-1 power pack.

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.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price	Street Price
1.		Nikon D810	146 mm	123 mm	82 mm	980 g	1200	Y	Jun 2014	US$ 3 299	ebay.com
2.		Olympus E-420	130 mm	91 mm	53 mm	440 g	500	n	Mar 2008	US$ 599	ebay.com
3.		Canon 5DS	152 mm	116 mm	76 mm	930 g	700	Y	Feb 2015	US$ 3 699	ebay.com
4.		Nikon D4S	160 mm	157 mm	91 mm	1350 g	3020	Y	Feb 2014	US$ 6 499	ebay.com
5.		Nikon D600	141 mm	113 mm	82 mm	850 g	900	Y	Sep 2012	US$ 2 099	ebay.com
6.		Nikon D610	141 mm	113 mm	82 mm	850 g	900	Y	Oct 2013	US$ 1 999	ebay.com
7.		Nikon D700	147 mm	123 mm	77 mm	1074 g	1000	Y	Jul 2008	US$ 2 999	ebay.com
8.		Nikon D750	141 mm	113 mm	78 mm	750 g	1230	Y	Sep 2014	US$ 2 299	ebay.com
9.		Nikon D800	146 mm	123 mm	82 mm	1000 g	900	Y	Feb 2012	US$ 2 999	ebay.com
10.		Nikon D800E	146 mm	123 mm	82 mm	1000 g	900	Y	Feb 2012	US$ 3 299	ebay.com
11.		Nikon D850	146 mm	124 mm	79 mm	1005 g	1840	Y	Jul 2017	US$ 3 299	amazon.com
12.		Nikon Df	144 mm	110 mm	67 mm	760 g	1400	Y	Nov 2013	US$ 2 749	ebay.com
13.		Olympus E-400	130 mm	91 mm	53 mm	435 g	500	n	Sep 2006	US$ 699	ebay.com
14.		Olympus E-410	130 mm	91 mm	53 mm	435 g	500	n	Mar 2007	US$ 699	ebay.com
15.		Olympus E-450	130 mm	91 mm	53 mm	440 g	500	n	Mar 2009	US$ 499	ebay.com
16.		Olympus E-520	136 mm	92 mm	68 mm	535 g	750	n	May 2008	US$ 699	ebay.com
17.		Olympus E-620	130 mm	94 mm	60 mm	521 g	500	n	Feb 2009	US$ 699	ebay.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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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 E-420 was launched at a markedly lower price (by 82 percent) than the D810, 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.

Sensor comparison

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its 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 Nikon D810 features a full frame sensor and the Olympus E-420 a Four Thirds sensor. The sensor area in the E-420 is 74 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 2.0. The sensor in the D810 has a native 3:2 aspect ratio, while the one in the E-420 offers a 4:3 aspect.

With 36.2MP, the D810 offers a higher resolution than the E-420 (10MP), but the D810 nevertheless has larger individual pixels (pixel pitch of 4.88μm versus 4.74μm for the E-420) due to its larger sensor. Moreover, the D810 is a much more recent model (by 6 years and 3 months) than the E-420, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that the D810 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Nikon D810 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the D810 for good quality output (200 dots per inch) amounts to 36.8 x 24.6 inches or 93.5 x 62.4 cm, for very good quality (250 dpi) 29.4 x 19.6 inches or 74.8 x 49.9 cm, and for excellent quality (300 dpi) 24.5 x 16.4 inches or 62.3 x 41.6 cm. The corresponding values for the Olympus E-420 are 18.2 x 13.7 inches or 46.3 x 34.7 cm for good quality, 14.6 x 10.9 inches or 37.1 x 27.8 cm for very good quality, and 12.2 x 9.1 inches or 30.9 x 23.2 cm for excellent quality prints.

The Nikon D810 has a native sensitivity range from ISO 64 to ISO 12800, which can be extended to ISO 32-51200. The corresponding ISO settings for the Olympus E-420 are ISO 100 to ISO 1600 (no boost).

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.

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under review, the D810 provides substantially higher image quality than the E-420, with an overall score that is 41 points higher. This advantage is based on 4.2 bits higher color depth, 4.4 EV in additional dynamic range, and 2.4 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.

Sensor Characteristics

		Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
1.		Nikon D810	Full Frame	36.2	7360	4912	1080/60p	25.7	14.8	2853	97
2.		Olympus E-420	Four Thirds	10.0	3648	2736	none	21.5	10.4	527	56
3.		Canon 5DS	Full Frame	50.3	8688	5792	1080/30p	24.7	12.4	2381	87
4.		Nikon D4S	Full Frame	16.2	4928	3280	1080/60p	24.4	13.3	3074	89
5.		Nikon D600	Full Frame	24.2	6016	4016	1080/30p	25.1	14.2	2980	94
6.		Nikon D610	Full Frame	24.2	6016	4016	1080/30p	25.1	14.4	2925	94
7.		Nikon D700	Full Frame	12.1	4256	2832	none	23.5	12.2	2303	80
8.		Nikon D750	Full Frame	24.2	6016	4016	1080/60p	24.8	14.5	2956	93
9.		Nikon D800	Full Frame	36.2	7360	4912	1080/30p	25.3	14.4	2853	95
10.		Nikon D800E	Full Frame	36.2	7360	4912	1080/30p	25.6	14.3	2979	96
11.		Nikon D850	Full Frame	45.4	8256	5504	4K/30p	26.4	14.8	2660	100
12.		Nikon Df	Full Frame	16.2	4928	3280	none	24.6	13.1	3279	89
13.		Olympus E-400	Four Thirds	10.0	3648	2736	none	21.0	10.6	127	53
14.		Olympus E-410	Four Thirds	10.0	3648	2736	none	21.1	10.0	494	51
15.		Olympus E-450	Four Thirds	10.0	3648	2736	none	21.5	10.5	512	56
16.		Olympus E-520	Four Thirds	10.0	3648	2736	none	21.4	10.4	548	55
17.		Olympus E-620	Four Thirds	12.2	4032	3024	none	21.3	10.3	536	55
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 can also record movies. The D810 indeed provides movie recording capabilities, while the E-420 does not. The highest resolution format that the D810 can use is 1080/60p.

Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The D810 and the E-420 are similar in the sense that both have an optical viewfinder. The latter is useful for getting a clear image for framing even in brightly lit environments. The viewfinder in the D810 offers a wider field of view (100%) than the one in the E-420 (95%), so that a larger proportion of the captured image is visible in the finder. In addition, the viewfinder of the D810 has a higher magnification (0.70x vs 0.46x), 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 Nikon D810, the Olympus E-420, and comparable 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.		Nikon D810	optical	Y	3.2 / 1229	fixed	n	1/8000s	5.0/s	Y	n
2.		Olympus E-420	optical	n	2.7 / 215	fixed	n	1/4000s	3.5/s	Y	n
3.		Canon 5DS	optical	Y	3.2 / 1040	fixed	n	1/8000s	5.0/s	n	n
4.		Nikon D4S	optical	Y	3.2 / 921	fixed	n	1/8000s	11.0/s	n	n
5.		Nikon D600	optical	Y	3.0 / 921	fixed	n	1/4000s	5.5/s	Y	n
6.		Nikon D610	optical	Y	3.2 / 921	fixed	n	1/4000s	6.0/s	Y	n
7.		Nikon D700	optical	Y	3.0 / 922	fixed	n	1/8000s	8.0/s	Y	n
8.		Nikon D750	optical	Y	3.2 / 1229	tilting	n	1/4000s	6.0/s	Y	n
9.		Nikon D800	optical	Y	3.2 / 921	fixed	n	1/8000s	4.0/s	Y	n
10.		Nikon D800E	optical	Y	3.2 / 921	fixed	n	1/8000s	4.0/s	Y	n
11.		Nikon D850	optical	Y	3.2 / 2359	tilting	Y	1/8000s	9.0/s	n	n
12.		Nikon Df	optical	Y	3.2 / 921	fixed	n	1/4000s	5.5/s	n	n
13.		Olympus E-400	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	n
14.		Olympus E-410	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	n
15.		Olympus E-450	optical	n	2.7 / 215	fixed	n	1/4000s	3.5/s	Y	n
16.		Olympus E-520	optical	n	2.7 / 215	fixed	n	1/4000s	3.5/s	Y	Y
17.		Olympus E-620	optical	n	2.7 / 230	swivel	n	1/4000s	4.0/s	Y	Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that is present on the D810, but is missing on the E-420 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.

The Nikon D810 has 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 D810 writes its imaging data to Compact Flash or SDXC cards, while the E-420 uses Compact Flash or xD Picture cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.

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 Nikon D810 and Olympus E-420 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.		Nikon D810	Y	stereo / mono	Y	Y	mini	3.0	Y	-	-
2.		Olympus E-420	Y	- / -	-	-	-	2.0	-	-	-
3.		Canon 5DS	Y	mono / mono	Y	-	mini	3.0	-	-	-
4.		Nikon D4S	Y	mono / mono	Y	Y	mini	2.0	-	-	-
5.		Nikon D600	Y	mono / mono	Y	Y	mini	2.0	-	-	-
6.		Nikon D610	Y	mono / mono	Y	Y	mini	2.0	-	-	-
7.		Nikon D700	Y	- / -	-	-	mini	2.0	-	-	-
8.		Nikon D750	Y	stereo / mono	Y	Y	mini	2.0	Y	-	-
9.		Nikon D800	Y	mono / mono	Y	Y	mini	3.0	-	-	-
10.		Nikon D800E	Y	mono / mono	Y	Y	mini	3.0	-	-	-
11.		Nikon D850	Y	stereo / mono	Y	Y	mini	3.0	Y	Y	Y
12.		Nikon Df	Y	- / -	-	-	mini	2.0	-	-	-
13.		Olympus E-400	Y	- / -	-	-	-	2.0	-	-	-
14.		Olympus E-410	Y	- / -	-	-	-	2.0	-	-	-
15.		Olympus E-450	Y	- / -	-	-	-	2.0	-	-	-
16.		Olympus E-520	Y	- / -	-	-	-	2.0	-	-	-
17.		Olympus E-620	Y	- / -	-	-	-	2.0	-	-	-

It is notable that the D810 offers wifi support, while the E-420 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.

Studio photographers will appreciate that the Nikon D810 (unlike the E-420) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the D810 and the E-420 have been discontinued, but can regularly be found used on ebay. The D810 was replaced by the Nikon D850, while the E-420 does not have a direct successor. Further information on the features and operation of the D810 and E-420 can be found, respectively, in the Nikon D810 Manual (free pdf) or the online Olympus E-420 Manual.

Review summary

So how do things add up? Which of the two cameras – the Nikon D810 or the Olympus E-420 – 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.

Arguments in favor of the Nikon D810:

• More detail: Offers more megapixels (36.2 vs 10MP) with a 94% higher linear resolution.
• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• Better image quality: Scores substantially higher (41 points) in the DXO overall assessment.
• Richer colors: Generates images with noticeably better colors (4.2 bits more color depth).
• More dynamic range: Captures a larger spectrum of light and dark details (4.4 EV of extra DR).
• Better low-light sensitivity: Requires less light for good images (2.4 stops ISO advantage).
• Broader imaging potential: Can record not only still images but also 1080/60p movies.
• More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.70x vs 0.46x).
• Easier setting verification: Features an LCD display on top to control shooting parameters.
• Larger screen: Has a bigger rear LCD (3.2" vs 2.7") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (1229k vs 215k dots).
• Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
• Faster burst: Shoots at higher frequency (5 vs 3.5 flaps/sec) to capture the decisive moment.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• Longer lasting: Can take more shots (1200 versus 500) on a single battery charge.
• Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
• 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.
• Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
• More modern: Reflects 6 years and 3 months of technical progress since the E-420 launch.

Advantages of the Olympus E-420:

• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• More compact: Is smaller (130x91mm vs 146x123mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 540g or 55 percent) and is thus easier to take along.
• More affordable: Was introduced into a lower priced category (82 percent cheaper at launch).
• More heavily discounted: Has been around for much longer (launched in March 2008).

If the count of individual advantages (bullet points above) is taken as a guide, the D810 is the clear winner of the match-up (21 : 5 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding on a new camera. 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.

How about other alternatives? Do the specifications of the Nikon D810 and the Olympus E-420 place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing 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 D810 or the E-420. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.

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.

Expert Camera Reviews

		Camera   Model	AP   score	CL   score	DCW   score	DPR   score	EPZ   score	PB   score	Camera Launch	Launch Price	Street Price
1.		Nikon D810	5/5	..	5/5	86/100	5/5	4.5/5	Jun 2014	US$ 3 299	ebay.com
2.		Olympus E-420	..	85/100	..	+ +	4/5	4.5/5	Mar 2008	US$ 599	ebay.com
3.		Canon 5DS	..	+	..	83/100	4.5/5	4.5/5	Feb 2015	US$ 3 699	ebay.com
4.		Nikon D4S	5/5	..	..	..	4.5/5	4.5/5	Feb 2014	US$ 6 499	ebay.com
5.		Nikon D600	4/5	+ +	..	87/100	5/5	4.5/5	Sep 2012	US$ 2 099	ebay.com
6.		Nikon D610	4/5	+ +	..	87/100	4.5/5	4.5/5	Oct 2013	US$ 1 999	ebay.com
7.		Nikon D700	..	89/100	..	+ +	4.5/5	4.5/5	Jul 2008	US$ 2 999	ebay.com
8.		Nikon D750	5/5	+ +	4/5	90/100	4.5/5	4.5/5	Sep 2014	US$ 2 299	ebay.com
9.		Nikon D800	5/5	+ +	..	82/100	5/5	5/5	Feb 2012	US$ 2 999	ebay.com
10.		Nikon D800E	..	..	..	84/100	5/5	5/5	Feb 2012	US$ 3 299	ebay.com
11.		Nikon D850	4.5/5	+ +	5/5	89/100	4.5/5	5/5	Jul 2017	US$ 3 299	amazon.com
12.		Nikon Df	4/5	..	..	81/100	4/5	4/5	Nov 2013	US$ 2 749	ebay.com
13.		Olympus E-400	..	85/100	..	..	4/5	4/5	Sep 2006	US$ 699	ebay.com
14.		Olympus E-410	..	86/100	..	+ +	4/5	4.5/5	Mar 2007	US$ 699	ebay.com
15.		Olympus E-450	..	..	..	..	4/5	4/5	Mar 2009	US$ 499	ebay.com
16.		Olympus E-520	..	87/100	..	+ +	4.5/5	4.5/5	May 2008	US$ 699	ebay.com
17.		Olympus E-620	3/5	88/100	..	72/100	4.5/5	5/5	Feb 2009	US$ 699	ebay.com
Note: (+ +) 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.

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Other camera comparisons

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