Sony A7C vs YI M1
The Sony Alpha A7C and the YI M1 are two digital cameras that were revealed to the public, respectively, in September 2020 and September 2016. Both the A7C and the M1 are mirrorless interchangeable lens cameras that are based on a full frame (A7C) and a Four Thirds (M1) sensor. The Sony has a resolution of 24 megapixels, whereas the YI provides 20.2 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha A7C and the YI M1? 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.
An illustration of the physical size and weight of the Sony A7C and the YI M1 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 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 YI M1 is notably smaller (17 percent) than the Sony A7C. Moreover, the M1 is substantially lighter (45 percent) than the A7C. It is worth mentioning in this context that the A7C is splash and dust resistant, while the M1 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 Sony FE Lens Catalog (A7C) and the Micro Four Thirds Lens Catalog (M1). 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.
The battery packs of both cameras can be charged via USB, which can be very convenient when travelling.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.
|1.||Sony A7C||124 mm||71 mm||60 mm||509 g||740||Y||Sep 2020||1,799|
|2.||YI M1||114 mm||64 mm||34 mm||281 g||450||n||Sep 2016||349|
|3.||Canon SX730||110 mm||64 mm||40 mm||300 g||250||n||Apr 2017||399|
|4.||Canon SX420||104 mm||69 mm||85 mm||325 g||195||n||Jan 2016||299|
|5.||Canon SX710||113 mm||66 mm||35 mm||269 g||230||n||Jan 2015||349|
|6.||Fujifilm X-T4||135 mm||93 mm||64 mm||607 g||500||Y||Feb 2020||1,699|
|7.||Fujifilm X-A3||117 mm||67 mm||40 mm||339 g||410||n||Aug 2016||399|
|8.||Nikon 1 J5||98 mm||60 mm||32 mm||231 g||250||n||Apr 2015||399|
|9.||Olympus E-M1 III||134 mm||91 mm||69 mm||580 g||420||Y||Feb 2020||1,799|
|10.||Olympus E-M1 II||134 mm||91 mm||67 mm||574 g||440||Y||Sep 2016||1,999|
|11.||Sony A9 II||129 mm||96 mm||76 mm||678 g||690||Y||Oct 2019||4,499|
|12.||Sony A6600||120 mm||67 mm||69 mm||503 g||810||Y||Aug 2019||1,399|
|13.||Sony A7 III||127 mm||96 mm||74 mm||650 g||610||Y||Feb 2018||1,999|
|14.||Sony A9||127 mm||96 mm||63 mm||673 g||650||Y||Apr 2017||4,499|
|15.||Sony A6500||120 mm||67 mm||53 mm||453 g||350||Y||Oct 2016||1,399|
|16.||Sony A7 II||127 mm||96 mm||60 mm||599 g||350||Y||Nov 2014||1,999|
|17.||Sony A7||127 mm||94 mm||48 mm||474 g||340||Y||Oct 2013||1,699|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
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 M1 was launched at a markedly lower price (by 81 percent) than the A7C, 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.
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. 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 Sony A7C features a full frame sensor and the YI M1 a Four Thirds sensor. The sensor area in the M1 is 73 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 A7C has a native 3:2 aspect ratio, while the one in the M1 offers a 4:3 aspect.
With 24MP, the A7C offers a higher resolution than the M1 (20.2MP), but the A7C nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 3.34μm for the M1) due to its larger sensor. Moreover, the A7C is a much more recent model (by 3 years and 11 months) than the M1, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.
The resolution advantage of the Sony A7C implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7C for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the YI M1 are 25.9 x 19.4 inches or 65.8 x 49.4 cm for good quality, 20.7 x 15.6 inches or 52.7 x 39.5 cm for very good quality, and 17.3 x 13 inches or 43.9 x 32.9 cm for excellent quality prints.
The A7C has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Sony Alpha A7C has a native sensitivity range from ISO 100 to ISO 51200, which can be extended to ISO 50-204800. The corresponding ISO settings for the YI M1 are ISO 100 to ISO 25600 (no boost).
For many cameras, data on sensor performance has been reported by DXO Mark. 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 adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
| DXO |
|1.||Sony A7C||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3407||95|
|2.||YI M1||Four Thirds||20.2||5184||3888||4K/30p||..||..||..||..|
|8.||Nikon 1 J5||1-inch||20.7||5568||3712||4K/15p||21.1||12.0||479||65|
|9.||Olympus E-M1 III||Four Thirds||20.2||5184||3888||4K/30p||..||..||..||..|
|10.||Olympus E-M1 II||Four Thirds||20.2||5184||3888||4K/30p||23.7||12.8||1312||80|
|11.||Sony A9 II||Full Frame||24.0||6000||4000||4K/30p||25.0||14.0||3434||93|
|13.||Sony A7 III||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3730||96|
|14.||Sony A9||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92|
|16.||Sony A7 II||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|17.||Sony A7||Full Frame||24.0||6000||4000||1080/60p||24.8||14.2||2248||90|
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, and both provide the same movie specifications (4K/30p).
Beyond body and sensor, cameras can and do differ across a range of features. For example, the A7C 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 following table reports on some other key feature differences and similarities of the Sony A7C, the YI M1, and comparable cameras.
|8.||Nikon 1 J5||none||n||3.0||1037||tilting||Y||1/4000s||60.0||Y||n|
|9.||Olympus E-M1 III||2360||n||3.0||1037||swivel||Y||1/8000s||18.0||n||Y|
|10.||Olympus E-M1 II||2360||n||3.0||1037||swivel||Y||1/8000s||18.0||n||Y|
|11.||Sony A9 II||3686||n||3.0||1440||tilting||Y||1/8000s||10.0||n||Y|
|13.||Sony A7 III||2359||n||3.0||922||tilting||Y||1/8000s||10.0||n||Y|
|16.||Sony A7 II||2400||n||3.0||1230||tilting||n||1/8000s||5.0||n||Y|
One feature that differentiates the A7C and the M1 is in-body image stabilization (IBIS). The A7C reduces the risk of handshake-induced blur with all attached lenses, while the M1 offers no blur reduction with lenses that themselves do not provide optical image stabilization.The A7C has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the M1 does not have a selfie-screen.
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 A7C 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 Sony A7C and the YI M1 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 A7C writes its imaging data to SDXC or Memory Stick PRO Duo cards, while the M1 uses SDXC cards. The A7C 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.
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 Sony Alpha A7C and YI M1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|8.||Nikon 1 J5||-||stereo||mono||-||-||micro||2.0||Y||Y||-|
|9.||Olympus E-M1 III||Y||stereo||mono||Y||Y||micro||3.1||Y||-||Y|
|10.||Olympus E-M1 II||Y||stereo||mono||Y||Y||micro||3.0||Y||-||-|
|11.||Sony A9 II||Y||stereo||mono||Y||Y||micro||3.1||Y||Y||Y|
|13.||Sony A7 III||Y||stereo||mono||Y||Y||micro||3.1||Y||Y||Y|
|16.||Sony A7 II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-|
It is notable that the A7C has a microphone port, which is missing on the M1. Such an external microphone input can help to substantially improve the quality of audio recordings when a good external microphone is used.
Both the A7C and the M1 are recent models that are part of the current product line-up. Neither of the two has a direct predecessor, so perhaps they will constitute the origins of new camera lines for Sony and YI. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Sony and YI websites.
So how do things add up? Is the Sony A7C better than the YI M1 or vice versa? The listing below highlights the relative strengths of the two models.
Reasons to prefer the Sony Alpha A7C:
- More detail: Offers more megapixels (24 vs 20.2MP) with a 11% higher linear resolution.
- Better image quality: Features a larger and more technologically advanced imaging sensor.
- Richer colors: The sensor size advantage translates into images with better, more accurate colors.
- More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
- Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- Better sound: Can connect to an external microphone for higher quality sound recording.
- 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.
- 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 (10 vs 5 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Longer lasting: Can take more shots (740 versus 450) on a single battery charge.
- Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- Faster data transfer: Supports a more advanced USB protocol (3.2 vs 2.0).
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- Faster buffer clearing: Supports Ultra High Speed (UHS-II) SDXC cards.
- More modern: Reflects 3 years and 11 months of technical progress since the M1 launch.
Arguments in favor of the YI M1:
- More detailed LCD: Has a higher resolution rear screen (1040k vs 922k dots).
- More compact: Is smaller (114x64mm vs 124x71mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 228g or 45 percent) and is thus easier to take along.
- More affordable: Was introduced into a lower priced category (81 percent cheaper at launch).
- More heavily discounted: Has been around for much longer (launched in September 2016).
If the count of relative strengths (bullet points above) is taken as a measure, the A7C is the clear winner of the match-up (20 : 5 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 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 Sony A7C and the YI M1 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 incomplete and does no justice, for example, to the way the A7C or the M1 perform in practice. 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.
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], 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.
|1.||Sony A7C||3.5/5||..||86/100||4/5||4/5||Sep 2020||1,799|
|2.||YI M1||..||..||69/100||..||..||Sep 2016||349|
|3.||Canon SX730||..||+||..||4/5||4/5||Apr 2017||399|
|4.||Canon SX420||..||..||..||..||3/5||Jan 2016||299|
|5.||Canon SX710||..||+||..||4/5||3.5/5||Jan 2015||349|
|6.||Fujifilm X-T4||5/5||+ +||..||5/5||5/5||Feb 2020||1,699|
|7.||Fujifilm X-A3||..||..||74/100||4.5/5||4/5||Aug 2016||399|
|8.||Nikon 1 J5||..||..||..||4.5/5||4.5/5||Apr 2015||399|
|9.||Olympus E-M1 III||5/5||..||83/100||4.5/5||4/5||Feb 2020||1,799|
|10.||Olympus E-M1 II||5/5||+ +||85/100||4.5/5||4.5/5||Sep 2016||1,999|
|11.||Sony A9 II||..||..||90/100||5/5||5/5||Oct 2019||4,499|
|12.||Sony A6600||4/5||+||83/100||4.5/5||4/5||Aug 2019||1,399|
|13.||Sony A7 III||..||+ +||89/100||5/5||5/5||Feb 2018||1,999|
|14.||Sony A9||5/5||+ +||89/100||5/5||5/5||Apr 2017||4,499|
|15.||Sony A6500||5/5||+ +||85/100||4.5/5||4.5/5||Oct 2016||1,399|
|16.||Sony A7 II||5/5||+||82/100||4.5/5||5/5||Nov 2014||1,999|
|17.||Sony A7||5/5||+ +||80/100||5/5||5/5||Oct 2013||1,699|
|Notes: (+ +) 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. 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. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
Other camera comparisons
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Specifications: Sony A7C vs YI M1
Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.
|Camera Model||Sony A7C||YI M1|
|Camera Type||Mirrorless system camera||Mirrorless system camera|
|Camera Lens||Sony E mount lenses||Micro Four Thirds lenses|
|Launch Date||September 2020||September 2016|
|Launch Price||USD 1,799||USD 349|
|Sensor Specs||Sony A7C||YI M1|
|Sensor Format||Full Frame Sensor||Four Thirds Sensor|
|Sensor Size||35.6 x 23.8 mm||17.3 x 13.0 mm|
|Sensor Area||847.28 mm2||224.9 mm2|
|Sensor Diagonal||42.8 mm||21.6 mm|
|Sensor Resolution||24 Megapixels||20.2 Megapixels|
|Image Resolution||6000 x 4000 pixels||5184 x 3888 pixels|
|Pixel Pitch||5.94 μm||3.34 μm|
|Pixel Density||2.83 MP/cm2||8.96 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||4K/30p Video||4K/30p Video|
|ISO Setting||100 - 51,200 ISO||100 - 25,600 ISO|
|ISO Boost||50 - 204,800 ISO||no Enhancement|
|DXO Sensor Quality (score)||95||..|
|DXO Color Depth (bits)||25.0||..|
|DXO Dynamic Range (EV)||14.7||..|
|DXO Low Light (ISO)||3407||..|
|Screen Specs||Sony A7C||YI M1|
|Viewfinder Type||Electronic viewfinder||no viewfinder|
|Viewfinder Field of View||100%|
|Viewfinder Resolution||2360k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||922k dots||1040k dots|
|LCD Attachment||Swivel screen||Fixed screen|
|Shooting Specs||Sony A7C||YI M1|
|Focus System||On-Sensor Phase-detect||Contrast-detect AF|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/4000s|
|Continuous Shooting||10 shutter flaps/s||5 shutter flaps/s|
|Electronic Shutter||up to 1/8000s||no E-Shutter|
|Time-Lapse Photography||Intervalometer built-in||Intervalometer built-in|
|Image Stabilization||In-body stabilization||Lens stabilization only|
|Fill Flash||no On-Board Flash||no On-Board Flash|
|Storage Medium||MS or SDXC cards||SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-II||no|
|Connectivity Specs||Sony A7C||YI M1|
|USB Connector||USB 3.2||USB 2.0|
|HDMI Port||micro HDMI||micro HDMI|
|Microphone Port||External MIC port||no MIC socket|
|Headphone Socket||Headphone port||no Headphone port|
|Wifi Support||Wifi built-in||Wifi built-in|
|Near-Field Communication||NFC built-in||no NFC|
|Bluetooth Support||Bluetooth built-in||Bluetooth built-in|
|Body Specs||Sony A7C||YI M1|
|Environmental Sealing||Weathersealed body||not weather sealed|
|Battery Life (CIPA)||740 shots per charge||450 shots per charge|
|In-Camera Charging||USB charging||USB charging|
124 x 71 x 60 mm
(4.9 x 2.8 x 2.4 in)
114 x 64 x 34 mm
(4.5 x 2.5 x 1.3 in)
|Camera Weight||509 g (18.0 oz)||281 g (9.9 oz)|
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