Nikon Z6 III vs Sigma fp

The Nikon Z6 III and the Sigma fp are two digital cameras that were revealed to the public, respectively, in June 2024 and July 2019. Both the Z6 III and the fp are mirrorless interchangeable lens cameras that are equipped with a full frame sensor. The Nikon has a resolution of 24.3 megapixels, whereas the Sigma 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		Sigma fp
Mirrorless system camera		Mirrorless system camera
Nikon Z mount lenses		Leica L 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 100-25,600 (6 - 102,400)
Electronic viewfinder (5760k dots)		Viewfinder optional
3.2" LCD – 2100k dots		3.2" LCD – 2100k dots
Swivel touchscreen		Fixed touchscreen
14 shutter flaps per second		12 shutter flaps per second
In-body stabilization		Lens stabilization only
Weathersealed body		Weathersealed body
380 shots per battery charge		280 shots per battery charge
139 x 102 x 74 mm, 670 g		113 x 70 x 45 mm, 422 g

Check Z6 III price at
amazon.com
Check fp price at
amazon.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon Z6 III and the Sigma fp? 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 side-by-side display below illustrates the physical size and weight of the Nikon Z6 III and the Sigma fp. 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 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 Sigma fp is considerably smaller (44 percent) than the Nikon Z6 III. Moreover, the fp is substantially lighter (37 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 fp can take 280 images on a single charge of its Sigma BP-51 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. 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 Z6 III	139 mm	102 mm	74 mm	670 g	380	Y	Jun 2024	US$ 2 499	amazon.com
2.		Sigma fp	113 mm	70 mm	45 mm	422 g	280	Y	Jul 2019	US$ 1 899	amazon.com
3.		Canon R6 Mark II	138 mm	98 mm	88 mm	670 g	450	Y	Nov 2022	US$ 2 499	amazon.com
4.		Fujifilm X-Pro3	141 mm	83 mm	46 mm	497 g	440	Y	Oct 2019	US$ 1 799	amazon.com
5.		Nikon D780	144 mm	116 mm	76 mm	840 g	2260	Y	Jan 2020	US$ 2 299	amazon.com
6.		Nikon Z5	134 mm	101 mm	67 mm	675 g	470	Y	Jul 2020	US$ 1 399	ebay.com
7.		Nikon Z5 II	134 mm	101 mm	72 mm	700 g	330	Y	Apr 2025	US$ 1 699	amazon.com
8.		Nikon Z6	134 mm	101 mm	67 mm	675 g	310	Y	Aug 2018	US$ 1 999	ebay.com
9.		Nikon Z6 II	134 mm	101 mm	70 mm	705 g	410	Y	Oct 2020	US$ 1 999	amazon.com
10.		Nikon Z7 II	134 mm	101 mm	70 mm	705 g	420	Y	Oct 2020	US$ 2 999	amazon.com
11.		Nikon Z8	144 mm	119 mm	83 mm	910 g	340	Y	May 2023	US$ 3 999	amazon.com
12.		Nikon Zf	144 mm	103 mm	49 mm	710 g	380	Y	Sep 2023	US$ 1 999	amazon.com
13.		Panasonic S1	149 mm	110 mm	97 mm	1017 g	400	Y	Feb 2019	US$ 2 499	ebay.com
14.		Panasonic S1H	151 mm	114 mm	110 mm	1052 g	400	Y	May 2019	US$ 3 999	amazon.com
15.		Panasonic S5	133 mm	98 mm	82 mm	714 g	440	Y	Sep 2020	US$ 1 999	amazon.com
16.		Panasonic S5 II	134 mm	102 mm	90 mm	740 g	370	Y	Jan 2023	US$ 1 999	amazon.com
17.		Sony A9 III	136 mm	97 mm	83 mm	702 g	530	Y	Nov 2023	US$ 5 999	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 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 fp was launched at a somewhat lower price (by 24 percent) than the Z6 III, which makes it more attractive for photographers on a tight budget. 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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.

Both cameras under consideration feature a full frame sensor and have a format factor (sometimes also referred to as "crop factor") of 1.0. Within the spectrum of camera sensors, this places the review cameras among the large-sensor cameras that aim for top notch image quality. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

While the two cameras under review share the same sensor size, the Z6 III offers a slightly higher resolution of 24.3 megapixels, compared with 24 MP of the fp. This megapixels advantage translates into a 0.8 percent gain in linear resolution. On the other hand, these sensor specs imply that the Z6 III has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 5.94μm versus 5.98μm for the fp). In this context, it should be noted, however, that the Z6 III is much more recent (by 4 years and 11 months) than the fp, and its sensor will have benefitted from technological advances during this time that compensate for the smaller pixel size. Coming back to sensor resolution, it should be mentioned that the fp has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The Z6 III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

Unlike the fp, 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 Sigma fp are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 6-102400.

Technology-wise, both cameras are equipped with BSI-CMOS (Backside Illuminated 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 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.		Nikon Z6 III	Full Frame	24.3	6048	4024	6K/60p	25.4	14.8	3318	97
2.		Sigma fp	Full Frame	24.0	6000	4000	4K/30p	25.2	14.2	2829	94
3.		Canon R6 Mark II	Full Frame	24.0	6000	4000	4k/60p	25.4	14.6	3154	96
4.		Fujifilm X-Pro3	APS-C	26.0	6240	4160	4K/30p	24.1	13.6	1968	84
5.		Nikon D780	Full Frame	24.3	6048	4024	4K/30p	25.3	14.3	2877	95
6.		Nikon Z5	Full Frame	24.2	6016	4016	4K/30p	25.3	14.3	2929	95
7.		Nikon Z5 II	Full Frame	24.4	6048	4032	4K/60p	25.4	14.8	3398	97
8.		Nikon Z6	Full Frame	24.3	6048	4024	4K/30p	25.3	14.3	3299	95
9.		Nikon Z6 II	Full Frame	24.3	6048	4024	4K/60p	25.0	14.4	3303	94
10.		Nikon Z7 II	Full Frame	45.4	8256	5504	4K/60p	26.3	14.7	2841	100
11.		Nikon Z8	Full Frame	45.4	8256	5504	8K/30p	26.3	14.2	2548	98
12.		Nikon Zf	Full Frame	24.3	6048	4024	4K/60p	25.4	14.7	3243	96
13.		Panasonic S1	Full Frame	24.0	6000	4000	4K/60p	25.2	14.5	3333	95
14.		Panasonic S1H	Full Frame	24.0	6000	4000	6K/30p	25.2	14.2	2805	94
15.		Panasonic S5	Full Frame	24.0	6000	4000	4K/60p	25.1	14.5	2697	94
16.		Panasonic S5 II	Full Frame	24.0	6000	4000	6K/30p	25.4	14.6	3158	96
17.		Sony A9 III	Full Frame	24.0	6000	4000	4K/120p	25.4	14.7	3243	96
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. 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 fp. It can shoot video footage at 6K/60p, while the Sigma is limited to 4K/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. For example, the Z6 III has an electronic viewfinder (5760k dots), which can be very helpful when shooting in bright sunlight. In contrast, the fp relies on live view and the rear LCD for framing. That said, the fp can be equipped with an optional viewfinder – the EVF-11. The following table reports on some other key feature differences and similarities of the Nikon Z6 III, the Sigma fp, 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 Z6 III	5760	Y	3.2 / 2100	swivel	Y	1/8000s	14.0/s	n	Y
2.		Sigma fp	optional	n	3.2 / 2100	fixed	Y	1/8000s	12.0/s	n	n
3.		Canon R6 Mark II	3690	n	3.0 / 1620	swivel	Y	1/8000s	12.0/s	n	Y
4.		Fujifilm X-Pro3	3690	n	3.0 / 1620	tilting	Y	1/8000s	8.0/s	n	n
5.		Nikon D780	optical	Y	3.2 / 2359	tilting	Y	1/8000s	12.0/s	n	n
6.		Nikon Z5	3690	n	3.2 / 1040	tilting	Y	1/8000s	4.5/s	n	Y
7.		Nikon Z5 II	3690	n	3.2 / 2100	swivel	Y	1/8000s	14.0/s	n	Y
8.		Nikon Z6	3690	Y	3.2 / 2100	tilting	Y	1/8000s	12.0/s	n	Y
9.		Nikon Z6 II	3690	Y	3.2 / 2100	tilting	Y	1/8000s	14.0/s	n	Y
10.		Nikon Z7 II	3690	Y	3.2 / 2100	tilting	Y	1/8000s	10.0/s	n	Y
11.		Nikon Z8	3690	Y	3.2 / 2089	full-flex	Y	1/32000s	30.0/s	n	Y
12.		Nikon Zf	3690	n	3.2 / 2100	swivel	Y	1/8000s	14.0/s	n	Y
13.		Panasonic S1	5760	Y	3.2 / 2100	full-flex	Y	1/8000s	9.0/s	n	Y
14.		Panasonic S1H	5760	Y	3.2 / 2330	swivel	Y	1/8000s	9.0/s	n	Y
15.		Panasonic S5	2360	n	3.0 / 1840	swivel	Y	1/8000s	7.0/s	n	Y
16.		Panasonic S5 II	3680	n	3.0 / 1840	swivel	Y	1/8000s	9.0/s	n	Y
17.		Sony A9 III	9440	n	3.2 / 2100	full-flex	Y	1/80000s	120.0/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 fp 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 and the Sigma fp 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 Z6 III writes its imaging data to CFexpress (type B) or SDXC cards, while the fp uses SDXC cards. The Z6 III features dual card slots, which can be very useful in case a memory card fails. In contrast, the fp only has one slot. Both cameras support UHS-II cards, which provide for Ultra High Speed data transfer of up to 312 MB/s.

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 Sigma fp 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.		Sigma fp	Y	stereo / mono	Y	-	micro	3.1	-	-	-
3.		Canon R6 Mark II	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
4.		Fujifilm X-Pro3	Y	stereo / mono	Y	-	-	3.1	Y	-	Y
5.		Nikon D780	Y	stereo / mono	Y	Y	mini	3.1	Y	-	Y
6.		Nikon Z5	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
7.		Nikon Z5 II	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
8.		Nikon Z6	Y	stereo / mono	Y	Y	micro	3.1	Y	-	Y
9.		Nikon Z6 II	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
10.		Nikon Z7 II	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
11.		Nikon Z8	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
12.		Nikon Zf	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
13.		Panasonic S1	Y	stereo / mono	Y	Y	full	3.1	Y	-	Y
14.		Panasonic S1H	Y	stereo / mono	Y	Y	full	3.1	Y	-	Y
15.		Panasonic S5	Y	stereo / mono	Y	Y	micro	3.2	Y	-	Y
16.		Panasonic S5 II	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y
17.		Sony A9 III	Y	stereo / mono	Y	Y	full	3.2	Y	-	Y

It is notable that the Z6 III has a headphone jack, which is not present on the fp This port makes it possible to attach external headphones and monitor the quality of sound during the recording process.

Both the Z6 III and the fp are recent models that are part of the current product line-up. The Z6 III replaced the earlier Nikon Z6 II, while the fp does not have a direct predecessor. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Sigma websites.

Review summary

So what conclusions can be drawn? Which of the two cameras – the Nikon Z6 III or the Sigma fp – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Nikon Z6 III:

• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• High quality composites: Can combine several shots after pixel-shifting its sensor.
• Better video: Provides higher definition movie capture (6K/60p vs 4K/30p).
• Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
• Better sound control: Has a headphone port that enables audio monitoring while recording.
• Easier framing: Has an electronic viewfinder for image composition and settings control.
• Easier setting verification: Features an LCD display on top to control shooting parameters.
• 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.
• Faster burst: Shoots at higher frequency (14 vs 12 flaps/sec) to capture the decisive moment.
• Longer lasting: Can take more shots (380 versus 280) on a single battery charge.
• Sharper images: Has hand-shake reducing image stabilization built-in.
• Faster data transfer: Supports a more advanced USB protocol (3.2 vs 3.1).
• Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
• Easier wireless transfer: Supports Bluetooth for image sharing without cables.
• Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
• More modern: Reflects 4 years and 11 months of technical progress since the fp launch.

Arguments in favor of the Sigma fp:

• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• More compact: Is smaller (113x70mm vs 139x102mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 248g or 37 percent) and is thus easier to take along.
• More affordable: Was released into a lower priced segment (24 percent cheaper at launch).
• More heavily discounted: Has been around for much longer (launched in July 2019).

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 (17 : 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 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 Z6 III and the Sigma fp 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 remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the Z6 III or the fp. 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 why expert reviews are important. 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 Z6 III	..	..	..	..	..	..	Jun 2024	US$ 2 499	amazon.com
2.		Sigma fp	4/5	..	4/5	..	4/5	4.5/5	Jul 2019	US$ 1 899	amazon.com
3.		Canon R6 Mark II	5/5	+ +	4.5/5	91/100	4.5/5	5/5	Nov 2022	US$ 2 499	amazon.com
4.		Fujifilm X-Pro3	4/5	+	4/5	85/100	4/5	..	Oct 2019	US$ 1 799	amazon.com
5.		Nikon D780	5/5	..	5/5	87/100	4.5/5	4.5/5	Jan 2020	US$ 2 299	amazon.com
6.		Nikon Z5	4/5	..	4/5	89/100	4.5/5	4/5	Jul 2020	US$ 1 399	ebay.com
7.		Nikon Z5 II	..	..	..	..	..	..	Apr 2025	US$ 1 699	amazon.com
8.		Nikon Z6	5/5	..	5/5	89/100	4.5/5	5/5	Aug 2018	US$ 1 999	ebay.com
9.		Nikon Z6 II	4.5/5	..	4/5	89/100	4.5/5	4.5/5	Oct 2020	US$ 1 999	amazon.com
10.		Nikon Z7 II	4.5/5	..	4.5/5	..	4.5/5	4.5/5	Oct 2020	US$ 2 999	amazon.com
11.		Nikon Z8	5/5	..	5/5	94/100	5/5	4.5/5	May 2023	US$ 3 999	amazon.com
12.		Nikon Zf	4.5/5	..	4.5/5	90/100	4.5/5	5/5	Sep 2023	US$ 1 999	amazon.com
13.		Panasonic S1	4.5/5	+ +	4.5/5	88/100	4.5/5	4/5	Feb 2019	US$ 2 499	ebay.com
14.		Panasonic S1H	..	..	4/5	90/100	..	..	May 2019	US$ 3 999	amazon.com
15.		Panasonic S5	4.5/5	+ +	4.5/5	88/100	4.5/5	4.5/5	Sep 2020	US$ 1 999	amazon.com
16.		Panasonic S5 II	4.5/5	+ +	5/5	90/100	4.5/5	5/5	Jan 2023	US$ 1 999	amazon.com
17.		Sony A9 III	4.5/5	..	..	91/100	..	..	Nov 2023	US$ 5 999	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. 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, please note that some of the review sites have changed their methodology and reporting over time.

Check Z6 III price at
amazon.com
Check fp price at
amazon.com

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.

~

Check Z6 III price at
amazon.com
Check fp price at
amazon.com

Did you notice an error on this page? If so, please get in touch, so that we can correct the information.