YI M1 vs Panasonic G7

The YI M1 and the Panasonic Lumix DMC-G7 are two digital cameras that were announced, respectively, in September 2016 and May 2015. Both the M1 and the G7 are mirrorless interchangeable lens cameras that are equipped with a Four Thirds sensor. The YI has a resolution of 20.2 megapixels, whereas the Panasonic provides 15.8 MP.

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

Headline Specifications

YI M1		Panasonic G7
Mirrorless system camera		Mirrorless system camera
Micro Four Thirds lenses		Micro Four Thirds lenses
20.2 MP – Four Thirds sensor		15.8 MP – Four Thirds sensor
4K/30p Video		4K/30p Video
ISO 100-25,600		ISO 160-25,600
No viewfinder, LCD framing		Electronic viewfinder (2360k dots)
3.0" LCD – 1040k dots		3.0" LCD – 1040k dots
Fixed touchscreen		Swivel touchscreen
5 shutter flaps per second		7 shutter flaps per second
450 shots per battery charge		350 shots per battery charge
114 x 64 x 34 mm, 281 g		125 x 86 x 77 mm, 410 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the YI M1 and the Panasonic Lumix DMC-G7? 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 YI M1 and the Panasonic G7 is provided 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 size dimensions are rounded to the nearest millimeter.

Both cameras are available in two different colors (black, silver).

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic G7 is considerably larger (47 percent) than the YI M1. Moreover, the G7 is substantially heavier (46 percent) than the M1. In this context, it is worth noting that neither the M1 nor the G7 are weather-sealed.

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. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can compare the optics available in the Micro Four Thirds Lens Catalog. Mirrorless cameras, such as the two under consideration, have the additional advantage of having a short flange to focal plane distance, which makes it possible to mount many lenses from other systems onto the camera via adapters.

Concerning battery life, the M1 gets 450 shots out of its YI BXM-10 battery, while the G7 can take 350 images on a single charge of its Panasonic DMW-BLC12 power pack. The power pack in the M1 can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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.		YI M1	114 mm	64 mm	34 mm	281 g	450	n	Sep 2016	US$ 349	ebay.com
2.		Panasonic G7	125 mm	86 mm	77 mm	410 g	350	n	May 2015	US$ 649	ebay.com
3.		Canon SX420	104 mm	69 mm	85 mm	325 g	195	n	Jan 2016	US$ 299	ebay.com
4.		Canon SX430	104 mm	69 mm	85 mm	323 g	195	n	Jan 2017	US$ 299	ebay.com
5.		Canon SX710	113 mm	66 mm	35 mm	269 g	230	n	Jan 2015	US$ 349	ebay.com
6.		Canon SX720	110 mm	64 mm	36 mm	270 g	250	n	Feb 2016	US$ 379	ebay.com
7.		Canon SX730	110 mm	64 mm	40 mm	300 g	250	n	Apr 2017	US$ 399	ebay.com
8.		Fujifilm X-A3	117 mm	67 mm	40 mm	339 g	410	n	Aug 2016	US$ 399	ebay.com
9.		Nikon 1 J5	98 mm	60 mm	32 mm	231 g	250	n	Apr 2015	US$ 399	ebay.com
10.		Panasonic G5	120 mm	83 mm	71 mm	396 g	320	n	Jul 2012	US$ 599	ebay.com
11.		Panasonic G6	122 mm	85 mm	71 mm	390 g	340	n	Apr 2013	US$ 599	ebay.com
12.		Panasonic GF7	107 mm	65 mm	33 mm	266 g	230	n	Jan 2015	US$ 499	ebay.com
13.		Panasonic GH2	124 mm	90 mm	76 mm	442 g	330	n	Sep 2010	US$ 899	ebay.com
14.		Panasonic GM1	99 mm	55 mm	30 mm	204 g	230	n	Oct 2013	US$ 749	ebay.com
15.		Panasonic GM5	99 mm	60 mm	36 mm	211 g	220	n	Sep 2014	US$ 749	ebay.com
16.		Panasonic GX850	107 mm	65 mm	33 mm	269 g	210	n	Jan 2017	US$ 549	ebay.com
17.		Sony HX80	102 mm	58 mm	36 mm	245 g	390	n	Mar 2016	US$ 349	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 obviously take relative prices into account. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The M1 was launched at a markedly lower price (by 46 percent) than the G7, 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 sensor inside a digital camera is one of the key determinants 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. 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature a Four Thirds sensor and have a format factor (sometimes also referred to as "crop factor") of 2.0. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

While the two cameras under review share the same sensor size, the M1 offers a higher resolution of 20.2 megapixels, compared with 15.8 MP of the G7. This megapixels advantage translates into a 13 percent gain in linear resolution. On the other hand, these sensor specs imply that the M1 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.34μm versus 3.77μm for the G7). In this context, it should be noted, however, that the M1 is a somewhat more recent model (by 1 year and 4 months) than the G7, and its sensor might have benefitted from technological advances during this time that at least partly compensate for the smaller pixel size.

The resolution advantage of the YI M1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the M1 for good quality output (200 dots per inch) amounts to 25.9 x 19.4 inches or 65.8 x 49.4 cm, for very good quality (250 dpi) 20.7 x 15.6 inches or 52.7 x 39.5 cm, and for excellent quality (300 dpi) 17.3 x 13 inches or 43.9 x 32.9 cm. The corresponding values for the Panasonic G7 are 23 x 17.2 inches or 58.3 x 43.8 cm for good quality, 18.4 x 13.8 inches or 46.7 x 35 cm for very good quality, and 15.3 x 11.5 inches or 38.9 x 29.2 cm for excellent quality prints.

The YI M1 has a native sensitivity range from ISO 100 to ISO 25600. The corresponding ISO settings for the Panasonic Lumix DMC-G7 are ISO 160 to ISO 25600 (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.

For many cameras, data on sensor performance has been reported by DXO Mark. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). 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.		YI M1	Four Thirds	20.2	5184	3888	4K/30p	23.0	12.6	1030	73
2.		Panasonic G7	Four Thirds	15.8	4592	3448	4K/30p	22.8	12.4	904	71
3.		Canon SX420	1/2.3	19.9	5152	3864	720/25p	20.3	11.7	806	48
4.		Canon SX430	1/2.3	19.9	5152	3864	720/25p	20.5	11.9	900	49
5.		Canon SX710	1/2.3	20.2	5184	3888	1080/60p	20.2	11.6	712	47
6.		Canon SX720	1/2.3	20.2	5184	3888	1080/60p	20.3	11.8	817	48
7.		Canon SX730	1/2.3	20.2	5184	3888	1080/60p	20.5	11.9	924	50
8.		Fujifilm X-A3	APS-C	24.0	6000	4000	1080/60p	23.8	13.1	1664	81
9.		Nikon 1 J5	1-inch	20.7	5568	3712	4K/15p	21.1	12.0	479	65
10.		Panasonic G5	Four Thirds	15.9	4608	3456	1080/60p	21.4	11.6	618	61
11.		Panasonic G6	Four Thirds	15.9	4608	3456	1080/60p	21.3	11.5	639	61
12.		Panasonic GF7	Four Thirds	15.8	4592	3448	1080/60p	22.7	12.3	874	70
13.		Panasonic GH2	Four Thirds	15.9	4608	3456	1080/60i	21.2	11.3	655	60
14.		Panasonic GM1	Four Thirds	15.8	4592	3448	1080/60i	22.3	11.7	660	66
15.		Panasonic GM5	Four Thirds	15.8	4592	3448	1080/60p	22.1	11.7	721	66
16.		Panasonic GX850	Four Thirds	15.8	4592	3448	4K/30p	23.2	13.3	586	73
17.		Sony HX80	1/2.3	18.0	4896	3672	1080/60p	20.4	11.8	822	48
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. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, and both provide the same movie specifications (4K/30p).

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the G7 has an electronic viewfinder (2360k dots), which can be very helpful when shooting in bright sunlight. In contrast, the M1 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the YI M1 and Panasonic G7 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.		YI M1	none	n	3.0 / 1040	fixed	Y	1/4000s	5.0/s	n	n
2.		Panasonic G7	2360	n	3.0 / 1040	swivel	Y	1/4000s	7.0/s	Y	n
3.		Canon SX420	none	n	3.0 / 230	fixed	n	1/4000s	0.5/s	Y	Y
4.		Canon SX430	none	n	3.0 / 230	fixed	n	1/4000s	0.5/s	Y	Y
5.		Canon SX710	none	n	3.0 / 922	fixed	n	1/3200s	6.0/s	Y	Y
6.		Canon SX720	none	n	3.0 / 922	fixed	n	1/3200s	5.9/s	Y	Y
7.		Canon SX730	none	n	3.0 / 922	tilting	n	1/3200s	5.9/s	Y	Y
8.		Fujifilm X-A3	none	n	3.0 / 1040	tilting	Y	1/4000s	6.0/s	Y	n
9.		Nikon 1 J5	none	n	3.0 / 1037	tilting	Y	1/4000s	60.0/s	Y	n
10.		Panasonic G5	1440	n	3.0 / 920	swivel	Y	1/4000s	6.0/s	Y	n
11.		Panasonic G6	1440	n	3.0 / 1036	swivel	Y	1/4000s	7.0/s	Y	n
12.		Panasonic GF7	none	n	3.0 / 1040	tilting	Y	1/500s	5.8/s	Y	n
13.		Panasonic GH2	1534	n	3.0 / 460	swivel	n	1/4000s	3.0/s	Y	n
14.		Panasonic GM1	none	n	3.0 / 1036	fixed	Y	1/500s	5.0/s	Y	n
15.		Panasonic GM5	1166	n	3.0 / 921	fixed	Y	1/500s	5.8/s	n	n
16.		Panasonic GX850	none	n	3.0 / 1040	tilting	Y	1/500s	10.0/s	Y	n
17.		Sony HX80	638	n	3.0 / 922	tilting	n	1/2000s	10.0/s	Y	Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The G7 has one, while the M1 does not. While the built-in flash of the G7 is not very powerful, it can at times be useful as a fill-in light.

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 G7 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 YI M1 and the Panasonic G7 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 M1 and the G7 write their files to SDXC cards. The G7 supports UHS-II cards (Ultra High Speed data transfer of up to 312 MB/s), while the M1 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 YI M1 and Panasonic Lumix DMC-G7 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.		YI M1	Y	stereo / mono	-	-	micro	2.0	Y	-	Y
2.		Panasonic G7	Y	stereo / mono	Y	-	micro	2.0	Y	-	-
3.		Canon SX420	-	mono / mono	-	-	-	2.0	Y	Y	-
4.		Canon SX430	-	mono / mono	-	-	-	2.0	Y	Y	-
5.		Canon SX710	-	stereo / mono	-	-	micro	2.0	Y	Y	-
6.		Canon SX720	-	stereo / mono	-	-	micro	2.0	Y	Y	-
7.		Canon SX730	-	stereo / mono	-	-	micro	2.0	Y	Y	Y
8.		Fujifilm X-A3	Y	stereo / mono	-	-	micro	2.0	Y	-	-
9.		Nikon 1 J5	-	stereo / mono	-	-	micro	2.0	Y	Y	-
10.		Panasonic G5	Y	stereo / mono	-	-	mini	2.0	-	-	-
11.		Panasonic G6	Y	stereo / mono	Y	-	mini	2.0	Y	Y	-
12.		Panasonic GF7	-	stereo / mono	-	-	micro	2.0	Y	Y	-
13.		Panasonic GH2	Y	stereo / mono	Y	-	mini	2.0	-	-	-
14.		Panasonic GM1	-	stereo / mono	-	-	micro	2.0	Y	-	-
15.		Panasonic GM5	Y	stereo / mono	-	-	micro	2.0	Y	-	-
16.		Panasonic GX850	-	stereo / mono	-	-	micro	2.0	Y	-	-
17.		Sony HX80	-	stereo / mono	-	-	micro	2.0	Y	Y	-

It is notable that the G7 has a microphone port, which can help to improve the quality of audio recordings by attaching an external microphone. The M1 does not feature such a mic input.

Both the M1 and the G7 have been discontinued, but can regularly be found used on ebay. The G7 was replaced by the Panasonic G85, while the M1 does not have a direct successor. Further information on the features and operation of the M1 and G7 can be found, respectively, in the YI M1 Manual (free pdf) or the online Panasonic G7 Manual.

Review summary

So what conclusions can be drawn? Is there a clear favorite between the YI M1 and the Panasonic G7? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

Advantages of the YI M1:

• More detail: Offers more megapixels (20.2 vs 15.8MP) with a 13% higher linear resolution.
• More compact: Is smaller (114x64mm vs 125x86mm) and thus needs less room in the bag.
• Less heavy: Is lighter (by 129g or 31 percent) and hence easier to carry around.
• Longer lasting: Can take more shots (450 versus 350) on a single battery charge.
• Easier travel charging: Can be conveniently charged via its USB port.
• Easier wireless transfer: Supports Bluetooth for image sharing without cables.
• More affordable: Was introduced into a lower priced category (46 percent cheaper at launch).
• More modern: Is somewhat more recent (announced 1 year and 4 months after the G7).

Arguments in favor of the Panasonic Lumix DMC-G7:

• Better sound: Can connect to an external microphone for higher quality sound recording.
• Easier framing: Has an electronic viewfinder for image composition and settings control.
• 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 (7 vs 5 flaps/sec) to capture the decisive moment.
• Less disturbing: Has an electronic shutter option for completely silent shooting.
• Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
• Faster buffer clearing: Has an SD card interface that supports the UHS-II standard.
• More heavily discounted: Has been on the market for longer (launched in May 2015).

If the count of relative strengths (bullet points above) is taken as a measure, the G7 comes out slightly ahead of the M1 (9 : 8 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision 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 YI M1 and the Panasonic G7 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 M1 or the G7. 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	Street Price
1.		YI M1	..	..	..	69/100	..	..	Sep 2016	US$ 349	ebay.com
2.		Panasonic G7	4/5	+ +	3.5/5	80/100	5/5	4.5/5	May 2015	US$ 649	ebay.com
3.		Canon SX420	..	..	..	..	..	3/5	Jan 2016	US$ 299	ebay.com
4.		Canon SX430	..	..	..	..	3.5/5	3.5/5	Jan 2017	US$ 299	ebay.com
5.		Canon SX710	..	+	..	..	4/5	3.5/5	Jan 2015	US$ 349	ebay.com
6.		Canon SX720	..	+	..	..	4/5	4.5/5	Feb 2016	US$ 379	ebay.com
7.		Canon SX730	..	+	..	..	4/5	4/5	Apr 2017	US$ 399	ebay.com
8.		Fujifilm X-A3	..	..	..	74/100	4.5/5	4/5	Aug 2016	US$ 399	ebay.com
9.		Nikon 1 J5	..	..	..	..	4.5/5	4.5/5	Apr 2015	US$ 399	ebay.com
10.		Panasonic G5	3/5	+ +	..	..	4.5/5	4.5/5	Jul 2012	US$ 599	ebay.com
11.		Panasonic G6	4/5	+ +	..	..	5/5	4.5/5	Apr 2013	US$ 599	ebay.com
12.		Panasonic GF7	4/5	+	..	..	4.5/5	4.5/5	Jan 2015	US$ 499	ebay.com
13.		Panasonic GH2	5/5	+ +	..	79/100	4.5/5	5/5	Sep 2010	US$ 899	ebay.com
14.		Panasonic GM1	3/5	+	..	78/100	5/5	4.5/5	Oct 2013	US$ 749	ebay.com
15.		Panasonic GM5	3.5/5	+	..	77/100	5/5	4.5/5	Sep 2014	US$ 749	ebay.com
16.		Panasonic GX850	..	+	..	76/100	4.5/5	4.5/5	Jan 2017	US$ 549	ebay.com
17.		Sony HX80	..	..	..	..	..	..	Mar 2016	US$ 349	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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? 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.

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