Nikon Z8 vs Sony A7R III

The Nikon Z8 and the Sony Alpha A7R III are two enthusiast cameras that were officially introduced, respectively, in May 2023 and October 2017. Both the Z8 and the A7R III are mirrorless interchangeable lens cameras that are equipped with a full frame sensor. The Nikon has a resolution of 45.4 megapixels, whereas the Sony provides 42.2 MP.

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

Headline Specifications

Nikon Z8		Sony A7R III
Mirrorless system camera		Mirrorless system camera
Nikon Z mount lenses		Sony E mount lenses
45.4 MP – Full Frame sensor		42.2 MP – Full Frame sensor
8K/30p Video		4K/30p Video
ISO 64-25,600 (32 - 102,400)		ISO 100-32,000 (50 - 102,400)
Electronic viewfinder (3690k dots)		Electronic viewfinder (3686k dots)
3.2" LCD – 2089k dots		3.0" LCD – 1440k dots
Fully flexible touchscreen		Tilting touchscreen
30 shutter flaps per second		10 shutter flaps per second
In-body stabilization		In-body stabilization
Weathersealed body		Weathersealed body
340 shots per battery charge		650 shots per battery charge
144 x 119 x 83 mm, 910 g		127 x 96 x 74 mm, 650 g

Check Z8 price at
amazon.com
Check A7R III offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon Z8 and the Sony Alpha A7R III? 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 Z8 and the Sony A7R III is provided 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 dimensions 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 Sony A7R III is notably smaller (29 percent) than the Nikon Z8. Moreover, the A7R III is markedly lighter (29 percent) than the Z8. 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 Z8 gets 340 shots out of its Nikon EN-EL15c battery, while the A7R III can take 650 images on a single charge of its Sony NP-FZ100 power pack. The battery packs of both cameras can be charged via USB, which can be very convenient when travelling.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. In case you want to display and compare another camera duo, you can use the CAM-parator app to select your camera combination among a large number of options.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price	Street Price
1.		Nikon Z8	144 mm	119 mm	83 mm	910 g	340	Y	May 2023	EUR 4 599	amazon.com
2.		Sony A7R III	127 mm	96 mm	74 mm	650 g	650	Y	Oct 2017	EUR 3 499	ebay.com
3.		Canon R5	138 mm	98 mm	88 mm	738 g	320	Y	Jul 2020	EUR 4 499	amazon.com
4.		Canon R5 C	142 mm	101 mm	111 mm	770 g	320	Y	Jan 2022	EUR 4 999	amazon.com
5.		Fujifilm GFX 50S II	150 mm	104 mm	87 mm	900 g	440	Y	Sep 2021	EUR 3 999	amazon.com
6.		Nikon D850	146 mm	124 mm	79 mm	1005 g	1840	Y	Jul 2017	EUR 3 799	amazon.com
7.		Nikon Z6	134 mm	101 mm	67 mm	675 g	310	Y	Aug 2018	EUR 2 449	ebay.com
8.		Nikon Z7	134 mm	101 mm	67 mm	675 g	330	Y	Aug 2018	EUR 3 849	ebay.com
9.		Nikon Z7 II	134 mm	101 mm	70 mm	705 g	420	Y	Oct 2020	EUR 3 399	amazon.com
10.		Nikon Z9	149 mm	150 mm	91 mm	1340 g	740	Y	Oct 2021	EUR 5 999	amazon.com
11.		Panasonic S1R	149 mm	110 mm	97 mm	1016 g	380	Y	Feb 2019	EUR 3 699	amazon.com
12.		Sony A7R II	127 mm	96 mm	60 mm	625 g	290	Y	Jun 2015	EUR 3 499	ebay.com
13.		Sony A7R IIIA	127 mm	96 mm	74 mm	650 g	650	Y	Apr 2021	EUR 3 499	amazon.com
14.		Sony A7R IV	129 mm	96 mm	78 mm	665 g	670	Y	Jul 2019	EUR 3 999	ebay.com
15.		Sony A7R V	131 mm	97 mm	82 mm	723 g	530	Y	Oct 2022	EUR 4 499	amazon.com
16.		Sony A7S II	127 mm	96 mm	60 mm	627 g	370	Y	Sep 2015	EUR 3 399	ebay.com
17.		Sony A9	127 mm	96 mm	63 mm	673 g	650	Y	Apr 2017	EUR 5 299	ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
Convert to Imperial

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 A7R III was launched at a somewhat lower price (by 20 percent) than the Z8, which makes it more attractive for photographers on a tight budget. 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 size of the imaging sensor is a crucial determinant of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. They nevertheless have the same format factor of 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Despite having a slightly smaller sensor, the Nikon Z8 offers a higher resolution of 45.4 megapixels, compared with 42.2 MP of the Sony A7R III. 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 4.35μm versus 4.52μm for the A7R III). However, it should be noted that the Z8 is much more recent (by 5 years and 6 months) than the A7R III, 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 neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the sensor resolves.

Unlike the Z8, the A7R III has the capacity to capture high quality composite images 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 Nikon Z8 has a native sensitivity range from ISO 64 to ISO 25600, which can be extended to ISO 32-102400. The corresponding ISO settings for the Sony Alpha A7R III are ISO 100 to ISO 32000, with the possibility to increase the ISO range to 50-102400.

In terms of underlying technology, the Z8 is build around a Stacked BSI-CMOS sensor, while the A7R III 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 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"). The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. 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 Z8	Full Frame	45.4	8256	5504	8K/30p	26.3	14.2	2548	98
2.		Sony A7R III	Full Frame	42.2	7952	5304	4K/30p	26.0	14.7	3523	100
3.		Canon R5	Full Frame	44.8	8192	5464	8K/30p	25.3	14.6	3042	95
4.		Canon R5 C	Full Frame	44.8	8192	5464	8k/60p	25.4	14.5	3082	96
5.		Fujifilm GFX 50S II	Medium Format	51.1	8256	6192	1080/30p	25.9	14.8	3456	100
6.		Nikon D850	Full Frame	45.4	8256	5504	4K/30p	26.4	14.8	2660	100
7.		Nikon Z6	Full Frame	24.3	6048	4024	4K/30p	25.3	14.3	3299	95
8.		Nikon Z7	Full Frame	45.4	8256	5504	4K/30p	26.3	14.6	2668	99
9.		Nikon Z7 II	Full Frame	45.4	8256	5504	4K/60p	26.3	14.7	2841	100
10.		Nikon Z9	Full Frame	45.4	8256	5504	8K/30p	26.3	14.4	2451	98
11.		Panasonic S1R	Full Frame	46.7	8368	5584	4K/60p	26.4	14.1	3525	100
12.		Sony A7R II	Full Frame	42.2	7952	5304	4K/30p	26.0	13.9	3434	98
13.		Sony A7R IIIA	Full Frame	42.2	7952	5304	4K/30p	26.0	14.7	3523	100
14.		Sony A7R IV	Full Frame	60.2	9504	6336	4K/30p	26.0	14.8	3344	99
15.		Sony A7R V	Full Frame	60.2	9504	6336	8k/24p	26.5	14.8	3187	100
16.		Sony A7S II	Full Frame	12.0	4240	2832	4K/30p	23.6	13.3	2993	85
17.		Sony A9	Full Frame	24.0	6000	4000	4K/30p	24.9	13.3	3517	92
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 Z8 provides a higher video resolution than the A7R III. It can shoot video footage at 8K/30p, while the Sony is limited to 4K/30p.

Feature comparison

Apart from 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 Z8 offers a slightly higher resolution than the one in the A7R III (3690k vs 3686k dots). The following table reports on some other key feature differences and similarities of the Nikon Z8, the Sony A7R III, 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 Z8	3690	Y	3.2 / 2089	full-flex	Y	1/32000s	30.0/s	n	Y
2.		Sony A7R III	3686	n	3.0 / 1440	tilting	Y	1/8000s	10.0/s	n	Y
3.		Canon R5	5760	Y	3.2 / 2100	swivel	Y	1/8000s	12.0/s	n	Y
4.		Canon R5 C	5760	Y	3.2 / 2100	swivel	Y	1/8000s	12.0/s	n	n
5.		Fujifilm GFX 50S II	3690	Y	3.2 / 2360	full-flex	Y	1/4000s	3.0/s	n	Y
6.		Nikon D850	optical	Y	3.2 / 2359	tilting	Y	1/8000s	9.0/s	n	n
7.		Nikon Z6	3690	Y	3.2 / 2100	tilting	Y	1/8000s	12.0/s	n	Y
8.		Nikon Z7	3690	Y	3.2 / 2100	tilting	Y	1/8000s	9.0/s	n	Y
9.		Nikon Z7 II	3690	Y	3.2 / 2100	tilting	Y	1/8000s	10.0/s	n	Y
10.		Nikon Z9	3690	Y	3.2 / 2089	full-flex	Y	1/32000s	30.0/s	n	Y
11.		Panasonic S1R	5760	Y	3.2 / 2100	full-flex	Y	1/8000s	9.0/s	n	Y
12.		Sony A7R II	2400	n	3.0 / 1229	tilting	n	1/8000s	5.0/s	n	Y
13.		Sony A7R IIIA	3686	n	3.0 / 2340	tilting	Y	1/8000s	10.0/s	n	Y
14.		Sony A7R IV	5760	n	3.0 / 1440	tilting	Y	1/8000s	10.0/s	n	Y
15.		Sony A7R V	9440	n	3.2 / 2100	full-flex	Y	1/8000s	10.0/s	n	Y
16.		Sony A7S II	2400	n	3.0 / 1229	tilting	n	1/8000s	5.0/s	n	Y
17.		Sony A9	3686	n	3.0 / 1440	tilting	Y	1/8000s	20.0/s	n	Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that is present on the Z8, but is missing on the A7R III 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 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, both cameras under consideration feature an 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 Nikon Z8 and the Sony A7R III 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 Z8 writes its imaging data to CFexpress (type B) or SDXC cards, while the A7R III uses SDXC or Memory Stick PRO Duo cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. Both the Z8 and the A7R III support UHS-II cards, which provide for Ultra High Speed data transfer of up to 312 MB/s (the second slot of the A7R III only offers slower UHS-I transfer rates, though).

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 Z8 and Sony Alpha A7R III 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 Z8	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
2.		Sony A7R III	Y	stereo / mono	Y	Y	micro	3.1	Y	Y	Y
3.		Canon R5	Y	mono / mono	Y	Y	micro	3.2	Y	-	Y
4.		Canon R5 C	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
5.		Fujifilm GFX 50S II	Y	stereo / mono	Y	Y	micro	3.2	Y	-	-
6.		Nikon D850	Y	stereo / mono	Y	Y	mini	3.0	Y	Y	Y
7.		Nikon Z6	Y	stereo / mono	Y	Y	micro	3.1	Y	-	Y
8.		Nikon Z7	Y	stereo / mono	Y	Y	micro	3.1	Y	-	Y
9.		Nikon Z7 II	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
10.		Nikon Z9	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
11.		Panasonic S1R	Y	stereo / mono	Y	Y	full	3.1	Y	-	Y
12.		Sony A7R II	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
13.		Sony A7R IIIA	Y	stereo / mono	Y	Y	micro	3.2	Y	Y	Y
14.		Sony A7R IV	Y	stereo / mono	Y	Y	micro	3.1	Y	Y	Y
15.		Sony A7R V	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
16.		Sony A7S II	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
17.		Sony A9	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	Y

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

Travel and landscape photographers will find it useful that the Z8 has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.

The Z8 is a recent model that features in the current product line-up of Nikon. In contrast, the A7R III has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the A7R III was succeeded by the Sony A7R IV. Further information on the features and operation of the Z8 and A7R III can be found, respectively, in the Nikon Z8 Manual (free pdf) or the online Sony A7R III Manual.

Review summary

So what conclusions can be drawn? Which of the two cameras – the Nikon Z8 or the Sony A7R III – 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.

Reasons to prefer the Nikon Z8:

• Better video: Provides higher definition movie capture (8K/30p vs 4K/30p).
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.80x vs 0.78x).
• Easier setting verification: Features an LCD display on top to control shooting parameters.
• Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (2089k vs 1440k dots).
• More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
• Faster shutter: Has higher mechanical shutter speed (1/32000s vs 1/8000s) to freeze action.
• Faster burst: Shoots at higher frequency (30 vs 10 flaps/sec) to capture the decisive moment.
• Easier geotagging: Features an internal GPS sensor to log localization data.
• Faster data transfer: Supports a more advanced USB protocol (3.2 vs 3.1).
• More solid recording: Has a full-sized HDMI port for a sturdy connection to an external recorder.
• More modern: Reflects 5 years and 6 months of technical progress since the A7R III launch.

Arguments in favor of the Sony Alpha A7R III:

• High quality composites: Can combine several shots after pixel-shifting its sensor.
• Better low-light sensitivity: Can shoot in dim conditions (0.5 stops ISO advantage).
• More compact: Is smaller (127x96mm vs 144x119mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 260g or 29 percent) and is thus easier to take along.
• Longer lasting: Gets more shots (650 versus 340) out of a single battery charge.
• Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
• More affordable: Was released into a lower priced segment (20 percent cheaper at launch).
• More heavily discounted: Has been around for much longer (launched in October 2017).

If the count of relative strengths (bullet points above) is taken as a measure, the Z8 is the clear winner of the match-up (12 : 8 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 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 Nikon Z8 and the Sony A7R III place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens 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 Z8 or the A7R III. 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.

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 Z8	5/5	..	5/5	94/100	5/5	4.5/5	May 2023	EUR 4 599	amazon.com
2.		Sony A7R III	..	+ +	4/5	90/100	4.5/5	5/5	Oct 2017	EUR 3 499	ebay.com
3.		Canon R5	4.5/5	+	4/5	91/100	4.5/5	4.5/5	Jul 2020	EUR 4 499	amazon.com
4.		Canon R5 C	..	+ +	..	..	..	..	Jan 2022	EUR 4 999	amazon.com
5.		Fujifilm GFX 50S II	5/5	..	5/5	87/100	..	5/5	Sep 2021	EUR 3 999	amazon.com
6.		Nikon D850	4.5/5	+ +	5/5	89/100	4.5/5	5/5	Jul 2017	EUR 3 799	amazon.com
7.		Nikon Z6	5/5	..	5/5	89/100	4.5/5	5/5	Aug 2018	EUR 2 449	ebay.com
8.		Nikon Z7	5/5	+	4.8/5	89/100	4.5/5	5/5	Aug 2018	EUR 3 849	ebay.com
9.		Nikon Z7 II	4.5/5	..	4.5/5	..	4.5/5	4.5/5	Oct 2020	EUR 3 399	amazon.com
10.		Nikon Z9	5/5	..	4.5/5	94/100	5/5	5/5	Oct 2021	EUR 5 999	amazon.com
11.		Panasonic S1R	4.5/5	..	4.6/5	89/100	4.5/5	4.5/5	Feb 2019	EUR 3 699	amazon.com
12.		Sony A7R II	5/5	+ +	5/5	90/100	5/5	5/5	Jun 2015	EUR 3 499	ebay.com
13.		Sony A7R IIIA	..	+ +	4/5	90/100	4.5/5	5/5	Apr 2021	EUR 3 499	amazon.com
14.		Sony A7R IV	5/5	+	4.5/5	91/100	4.5/5	5/5	Jul 2019	EUR 3 999	ebay.com
15.		Sony A7R V	5/5	+ +	4.5/5	92/100	..	..	Oct 2022	EUR 4 499	amazon.com
16.		Sony A7S II	5/5	+	..	..	4.5/5	5/5	Sep 2015	EUR 3 399	ebay.com
17.		Sony A9	5/5	+ +	4.8/5	89/100	5/5	5/5	Apr 2017	EUR 5 299	ebay.com
Note: (+ +) 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 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

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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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