Nikon Z6 III vs Sony A9

The Nikon Z6 III and the Sony Alpha A9 are two digital cameras that were officially introduced, respectively, in June 2024 and April 2017. Both the Z6 III and the A9 are mirrorless interchangeable lens cameras that are equipped with a full frame sensor. The Nikon has a resolution of 24.3 megapixels, whereas the Sony provides 24 MP.

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

Headline Specifications

Nikon Z6 III		Sony A9
Mirrorless system camera		Mirrorless system camera
Nikon Z mount lenses		Sony E mount lenses
24.3 MP – Full Frame sensor		24 MP – Full Frame sensor
6K/60p Video		4K/30p Video
ISO 100-64,000 (50 - 204,800)		ISO 100-51,200 (50 - 204,800)
Electronic viewfinder (5760k dots)		Electronic viewfinder (3686k dots)
3.2" LCD – 2100k dots		3.0" LCD – 1440k dots
Swivel touchscreen		Tilting touchscreen
14 shutter flaps per second		20 shutter flaps per second
In-body stabilization		In-body stabilization
Weathersealed body		Weathersealed body
380 shots per battery charge		650 shots per battery charge
139 x 102 x 74 mm, 670 g		127 x 96 x 63 mm, 673 g

Check Z6 III price at
amazon.com
Check A9 offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon Z6 III and the Sony Alpha A9? 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 Nikon Z6 III and the Sony A9 are illustrated in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth dimensions are rounded to the nearest millimeter.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A9 is notably smaller (14 percent) than the Nikon Z6 III. However, the A9 is slightly heavier (0 percent) than the Z6 III. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.

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

Concerning battery life, the Z6 III gets 380 shots out of its Nikon EN-EL15c battery, while the A9 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 Z6 III	139 mm	102 mm	74 mm	670 g	380	Y	Jun 2024	EUR 2 999	amazon.com
2.		Sony A9	127 mm	96 mm	63 mm	673 g	650	Y	Apr 2017	EUR 5 299	ebay.com
3.		Fujifilm X-H2S	136 mm	93 mm	85 mm	660 g	580	Y	May 2022	EUR 2 749	amazon.com
4.		Nikon Z5	134 mm	101 mm	67 mm	675 g	470	Y	Jul 2020	EUR 1 549	ebay.com
5.		Nikon Z5 II	134 mm	101 mm	72 mm	700 g	330	Y	Apr 2025	EUR 1 899	amazon.com
6.		Nikon Z6	134 mm	101 mm	67 mm	675 g	310	Y	Aug 2018	EUR 2 449	ebay.com
7.		Nikon Z6 II	134 mm	101 mm	70 mm	705 g	410	Y	Oct 2020	EUR 2 199	amazon.com
8.		Nikon Z7 II	134 mm	101 mm	70 mm	705 g	420	Y	Oct 2020	EUR 3 399	amazon.com
9.		Nikon Zf	144 mm	103 mm	49 mm	710 g	380	Y	Sep 2023	EUR 2 499	amazon.com
10.		OM System OM-1	135 mm	92 mm	73 mm	599 g	520	Y	Feb 2022	EUR 2 199	ebay.com
11.		OM System OM-1 II	135 mm	92 mm	73 mm	599 g	500	Y	Jan 2024	EUR 2 399	amazon.com
12.		Panasonic GH7	138 mm	100 mm	100 mm	805 g	380	Y	Jun 2024	EUR 2 199	amazon.com
13.		Sony A7 II	127 mm	96 mm	60 mm	599 g	350	Y	Nov 2014	EUR 2 099	ebay.com
14.		Sony A7 III	127 mm	96 mm	74 mm	650 g	610	Y	Feb 2018	EUR 2 299	amazon.com
15.		Sony A7R III	127 mm	96 mm	74 mm	650 g	650	Y	Oct 2017	EUR 3 499	ebay.com
16.		Sony A7R V	131 mm	97 mm	82 mm	723 g	530	Y	Oct 2022	EUR 4 499	amazon.com
17.		Sony A9 II	129 mm	96 mm	76 mm	678 g	690	Y	Oct 2019	EUR 5 399	amazon.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
Convert to Imperial

The price is, of course, an important factor in any camera decision. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The Z6 III was launched at a markedly lower price (by 44 percent) than the A9, 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. 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. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. The sensor area in the A9 is 1 percent smaller. 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.

With 24.3MP, the Z6 III offers a slightly higher resolution than the A9 (24MP), but the Z6 III nevertheless has the same individual pixel size (pixel pitch of 5.94μm) as the A9 due to its larger sensor. It is noteworthy in this context that the Z6 III is a mch more recent model (by 7 years and 2 months) than the A9, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.

Unlike the A9, the Z6 III has the capacity to capture high quality composite images (96MP) 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 Z6 III has a native sensitivity range from ISO 100 to ISO 64000, which can be extended to ISO 50-204800. The corresponding ISO settings for the Sony Alpha A9 are ISO 100 to ISO 51200, with the possibility to increase the ISO range to 50-204800.

In terms of underlying technology, the Z6 III is build around a BSI-CMOS sensor, while the A9 uses a Stacked 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.

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"). The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

Sensor Characteristics

		Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
1.		Nikon Z6 III	Full Frame	24.3	6048	4024	6K/60p	25.4	14.8	3318	97
2.		Sony A9	Full Frame	24.0	6000	4000	4K/30p	24.9	13.3	3517	92
3.		Fujifilm X-H2S	APS-C	26.0	6240	4160	6.2k/30p	24.3	13.9	2224	86
4.		Nikon Z5	Full Frame	24.2	6016	4016	4K/30p	25.3	14.3	2929	95
5.		Nikon Z5 II	Full Frame	24.4	6048	4032	4K/60p	25.4	14.8	3398	97
6.		Nikon Z6	Full Frame	24.3	6048	4024	4K/30p	25.3	14.3	3299	95
7.		Nikon Z6 II	Full Frame	24.3	6048	4024	4K/60p	25.0	14.4	3303	94
8.		Nikon Z7 II	Full Frame	45.4	8256	5504	4K/60p	26.3	14.7	2841	100
9.		Nikon Zf	Full Frame	24.3	6048	4024	4K/60p	25.4	14.7	3243	96
10.		OM System OM-1	Four Thirds	20.2	5184	3888	4K/60p	23.4	13.4	1553	77
11.		OM System OM-1 II	Four Thirds	20.2	5184	3888	4K/60p	23.4	13.6	1749	78
12.		Panasonic GH7	Four Thirds	25.0	5776	4336	5.7K/60p	23.4	13.6	1784	78
13.		Sony A7 II	Full Frame	24.0	6000	4000	1080/60p	24.9	13.6	2449	90
14.		Sony A7 III	Full Frame	24.0	6000	4000	4K/30p	25.0	14.7	3730	96
15.		Sony A7R III	Full Frame	42.2	7952	5304	4K/30p	26.0	14.7	3523	100
16.		Sony A7R V	Full Frame	60.2	9504	6336	8k/24p	26.5	14.8	3187	100
17.		Sony A9 II	Full Frame	24.0	6000	4000	4K/30p	25.0	14.0	3434	93
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. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the Z6 III provides a higher video resolution than the A9. It can shoot video footage at 6K/60p, while the Sony is limited to 4K/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the Z6 III offers a substantially higher resolution than the one in the A9 (5760k vs 3686k dots). The adjacent table lists some of the other core features of the Nikon Z6 III and Sony A9 along with similar information for a selection of comparators.

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 Z6 III	5760	Y	3.2 / 2100	swivel	Y	1/8000s	14.0/s	n	Y
2.		Sony A9	3686	n	3.0 / 1440	tilting	Y	1/8000s	20.0/s	n	Y
3.		Fujifilm X-H2S	5760	Y	3.0 / 1620	swivel	Y	1/8000s	15.0/s	n	Y
4.		Nikon Z5	3690	n	3.2 / 1040	tilting	Y	1/8000s	4.5/s	n	Y
5.		Nikon Z5 II	3690	n	3.2 / 2100	swivel	Y	1/8000s	14.0/s	n	Y
6.		Nikon Z6	3690	Y	3.2 / 2100	tilting	Y	1/8000s	12.0/s	n	Y
7.		Nikon Z6 II	3690	Y	3.2 / 2100	tilting	Y	1/8000s	14.0/s	n	Y
8.		Nikon Z7 II	3690	Y	3.2 / 2100	tilting	Y	1/8000s	10.0/s	n	Y
9.		Nikon Zf	3690	n	3.2 / 2100	swivel	Y	1/8000s	14.0/s	n	Y
10.		OM System OM-1	5760	n	3.0 / 1640	swivel	Y	1/8000s	10.0/s	n	Y
11.		OM System OM-1 II	5760	n	3.0 / 1640	swivel	Y	1/8000s	10.0/s	n	Y
12.		Panasonic GH7	3680	n	3.0 / 1840	full-flex	Y	1/8000s	14.0/s	n	Y
13.		Sony A7 II	2400	n	3.0 / 1230	tilting	n	1/8000s	5.0/s	n	Y
14.		Sony A7 III	2359	n	3.0 / 922	tilting	Y	1/8000s	10.0/s	n	Y
15.		Sony A7R III	3686	n	3.0 / 1440	tilting	Y	1/8000s	10.0/s	n	Y
16.		Sony A7R V	9440	n	3.2 / 2100	full-flex	Y	1/8000s	10.0/s	n	Y
17.		Sony A9 II	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 Z6 III, but is missing on the A9 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 Z6 III 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 Z6 III writes its imaging data to CFexpress (type B) or SDXC cards, while the A9 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 Z6 III and the A9 support UHS-II cards, which provide for Ultra High Speed data transfer of up to 312 MB/s (the second slot of the A9 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 Z6 III and Sony Alpha A9 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 Z6 III	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
2.		Sony A9	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	Y
3.		Fujifilm X-H2S	Y	stereo / mono	Y	Y	full	3.0	Y	-	Y
4.		Nikon Z5	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
5.		Nikon Z5 II	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
6.		Nikon Z6	Y	stereo / mono	Y	Y	micro	3.1	Y	-	Y
7.		Nikon Z6 II	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
8.		Nikon Z7 II	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
9.		Nikon Zf	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
10.		OM System OM-1	Y	stereo / mono	Y	Y	micro	3.0	Y	-	Y
11.		OM System OM-1 II	Y	stereo / mono	Y	Y	micro	3.0	Y	-	Y
12.		Panasonic GH7	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
13.		Sony A7 II	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
14.		Sony A7 III	Y	stereo / mono	Y	Y	micro	3.1	Y	Y	Y
15.		Sony A7R III	Y	stereo / mono	Y	Y	micro	3.1	Y	Y	Y
16.		Sony A7R V	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
17.		Sony A9 II	Y	stereo / mono	Y	Y	micro	3.1	Y	Y	Y

Studio photographers will appreciate that the Sony A9 (unlike the Z6 III) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

The Z6 III is a recent model that features in the current product line-up of Nikon. In contrast, the A9 has been discontinued (but can be found pre-owned on ebay). As a replacement in the same line of cameras, the A9 was succeeded by the Sony A9 II. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Sony websites.

Review summary

So how do things add up? Which of the two cameras – the Nikon Z6 III or the Sony A9 – 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 Z6 III:

• High quality composites: Can combine several shots after pixel-shifting its sensor.
• Better video: Provides higher definition movie capture (6K/60p vs 4K/30p).
• More detailed viewfinder: Has higher resolution electronic viewfinder (5760k vs 3686k dots).
• 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 (2100k vs 1440k dots).
• 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.
• Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
• Faster data transfer: Supports a more advanced USB protocol (3.2 vs 2.0).
• More affordable: Was introduced into a lower priced category (44 percent cheaper at launch).
• More modern: Reflects 7 years and 2 months of technical progress since the A9 launch.

Advantages of the Sony Alpha A9:

• Faster burst: Shoots at higher frequency (20 vs 14 flaps/sec) to capture the decisive moment.
• More compact: Is smaller (127x96mm vs 139x102mm) and will fit more readily into a bag.
• Longer lasting: Gets more shots (650 versus 380) out of a single battery charge.
• Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
• Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
• More heavily discounted: Has been around for much longer (launched in April 2017).

If the count of individual advantages (bullet points above) is taken as a guide, the Z6 III is the clear winner of the match-up (13 : 6 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

How about other alternatives? Do the specifications of the Nikon Z6 III and the Sony A9 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 comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says little about, for example, the shooting experience and imaging performance of the Z6 III and the A9 in practical situations. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why expert reviews 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	Street Price
1.		Nikon Z6 III	..	..	..	..	..	..	Jun 2024	EUR 2 999	amazon.com
2.		Sony A9	5/5	+ +	4.8/5	89/100	5/5	5/5	Apr 2017	EUR 5 299	ebay.com
3.		Fujifilm X-H2S	5/5	+	5/5	90/100	5/5	5/5	May 2022	EUR 2 749	amazon.com
4.		Nikon Z5	4/5	..	4/5	89/100	4.5/5	4/5	Jul 2020	EUR 1 549	ebay.com
5.		Nikon Z5 II	..	..	..	..	..	..	Apr 2025	EUR 1 899	amazon.com
6.		Nikon Z6	5/5	..	5/5	89/100	4.5/5	5/5	Aug 2018	EUR 2 449	ebay.com
7.		Nikon Z6 II	4.5/5	..	4/5	89/100	4.5/5	4.5/5	Oct 2020	EUR 2 199	amazon.com
8.		Nikon Z7 II	4.5/5	..	4.5/5	..	4.5/5	4.5/5	Oct 2020	EUR 3 399	amazon.com
9.		Nikon Zf	4.5/5	..	4.5/5	90/100	4.5/5	5/5	Sep 2023	EUR 2 499	amazon.com
10.		OM System OM-1	5/5	..	..	87/100	5/5	4.5/5	Feb 2022	EUR 2 199	ebay.com
11.		OM System OM-1 II	..	..	..	..	..	..	Jan 2024	EUR 2 399	amazon.com
12.		Panasonic GH7	..	..	..	..	..	..	Jun 2024	EUR 2 199	amazon.com
13.		Sony A7 II	5/5	+	4/5	82/100	4.5/5	5/5	Nov 2014	EUR 2 099	ebay.com
14.		Sony A7 III	..	+ +	4.5/5	89/100	5/5	5/5	Feb 2018	EUR 2 299	amazon.com
15.		Sony A7R III	..	+ +	4/5	90/100	4.5/5	5/5	Oct 2017	EUR 3 499	ebay.com
16.		Sony A7R V	5/5	+ +	4.5/5	92/100	..	..	Oct 2022	EUR 4 499	amazon.com
17.		Sony A9 II	..	..	5/5	90/100	5/5	5/5	Oct 2019	EUR 5 399	amazon.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. 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? In case you are interested in seeing how other cameras pair up, just make your choice using the following search menu. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.

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