Sony A7S II vs YI M1
The Sony Alpha 7S II and the YI M1 are two digital cameras that were officially introduced, respectively, in September 2015 and September 2016. Both the A7S II and the M1 are mirrorless interchangeable lens cameras that are based on a full frame (A7S II) and a Four Thirds (M1) sensor. The Sony has a resolution of 12 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.
|Sony A7S II||YI M1|
|Mirrorless system camera||Mirrorless system camera|
|Sony E mount lenses||Micro Four Thirds lenses|
|12 MP, Full Frame Sensor||20.2 MP, Four Thirds Sensor|
|4K/30p Video||4K/30p Video|
|ISO 100-102400 (50-409600)||ISO 100-25600|
|Electronic viewfinder (2400k dots)||No viewfinder, LCD framing|
|3.0" LCD, 1229k dots||3.0" LCD, 1040k dots|
|Tilting screen (no touchscreen)||Fixed touchscreen|
|5 shutter flaps per second||5 shutter flaps per second|
|In-body stabilization||Lens stabilization only|
|Weathersealed body||Not weather sealed|
|370 shots per battery charge||450 shots per battery charge|
|127 x 96 x 60 mm, 627 g||114 x 64 x 34 mm, 281 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha 7S II 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 A7S II and the YI M1 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 size dimensions are rounded to the nearest millimeter.
The M1 can be obtained in two different colors (black, silver), while the A7S II is only available in black.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the YI M1 is considerably smaller (40 percent) than the Sony A7S II. Moreover, the M1 is substantially lighter (55 percent) than the A7S II. It is worth mentioning in this context that the A7S II 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 (A7S II) 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 adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. In case you want to display and compare another camera duo, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.
|Sony A7S II»||5.0 in||3.8 in||2.4 in||22.1 oz||370||Y||Sep 2015||2,999||Sony A7S II|
|YI M1«||4.5 in||2.5 in||1.3 in||9.9 oz||450||n||Sep 2016||349||YI M1|
|Canon SX730« »||4.3 in||2.5 in||1.6 in||10.6 oz||250||n||Apr 2017||399||-||Canon SX730|
|Fujifilm X-A3« »||4.6 in||2.6 in||1.6 in||12.0 oz||410||n||Aug 2016||399||-||Fujifilm X-A3|
|Nikon 1 J5« »||3.9 in||2.4 in||1.3 in||8.1 oz||250||n||Apr 2015||399||-||Nikon 1 J5|
|Panasonic GX850« »||4.2 in||2.6 in||1.3 in||9.5 oz||210||n||Jan 2017||549||Panasonic GX850|
|Panasonic GF7« »||4.2 in||2.6 in||1.3 in||9.4 oz||230||n||Jan 2015||499||-||Panasonic GF7|
|Sony A7R IV« »||5.1 in||3.8 in||3.1 in||23.5 oz||670||Y||Jul 2019||3,499||Sony A7R IV|
|Sony A7 III« »||5.0 in||3.8 in||2.9 in||22.9 oz||610||Y||Feb 2018||1,999||Sony A7 III|
|Sony A7R III« »||5.0 in||3.8 in||2.9 in||22.9 oz||650||Y||Oct 2017||3,199||-||Sony A7R III|
|Sony A9« »||5.0 in||3.8 in||2.5 in||23.7 oz||650||Y||Apr 2017||4,499||Sony A9|
|Sony A99 II« »||5.6 in||4.1 in||3.0 in||29.9 oz||490||Y||Sep 2016||3,199||Sony A99 II|
|Sony A7R II« »||5.0 in||3.8 in||2.4 in||22.0 oz||290||Y||Jun 2015||3,199||-||Sony A7R II|
|Sony A7 II« »||5.0 in||3.8 in||2.4 in||21.1 oz||350||Y||Nov 2014||1,999||-||Sony A7 II|
|Sony A7S« »||5.0 in||3.7 in||1.9 in||17.2 oz||380||Y||Apr 2014||2,499||-||Sony A7S|
|Sony A99« »||5.8 in||4.4 in||3.1 in||28.6 oz||500||Y||Sep 2012||2,799||-||Sony A99|
|Sony A900« »||6.1 in||4.6 in||3.2 in||31.6 oz||880||Y||Sep 2008||2,999||-||Sony A900|
|Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.|
The price is, of course, an important factor in any camera decision. 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 88 percent) than the A7S II, which puts it into a different market segment. 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.
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 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.
Of the two cameras under consideration, the Sony A7S II 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 A7S II has a native 3:2 aspect ratio, while the one in the M1 offers a 4:3 aspect.
Despite having a smaller sensor, the M1 offers a higher resolution of 20.2 megapixels, compared with 12 MP of the A7S II. 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 3.34μm versus 8.40μm for the A7S II). However, it should be noted that the M1 is a somewhat more recent model (by 1 year) than the A7S II, and its sensor might have benefitted from technological advances during this time that partly offset its pixel-size disadvantage.
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 inch or 65.8 x 49.4 cm, for very good quality (250 dpi) 20.7 x 15.6 inch or 52.7 x 39.5 cm, and for excellent quality (300 dpi) 17.3 x 13 inch or 43.9 x 32.9 cm. The corresponding values for the Sony A7S II are 21.2 x 14.2 inch or 53.8 x 36 cm for good quality, 17 x 11.3 inch or 43.1 x 28.8 cm for very good quality, and 14.1 x 9.4 inch or 35.9 x 24 cm for excellent quality prints.
The Sony Alpha 7S II has a native sensitivity range from ISO 100 to ISO 102400, which can be extended to ISO 50-409600. The corresponding ISO settings for the YI M1 are ISO 100 to ISO 25600 (no boost).
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 adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
|Sony A7S II»||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85||Sony A7S II|
|YI M1«||Four Thirds||20.2||5184||3888||4K/30p||-||-||-||-||YI M1|
|Canon SX730« »||1/2.3||20.2||5184||3888||1080/60p||-||-||-||-||Canon SX730|
|Fujifilm X-A3« »||APS-C||24.0||6000||4000||1080/60p||-||-||-||-||Fujifilm X-A3|
|Nikon 1 J5« »||1-inch||20.7||5568||3712||4K/15p||21.1||12.0||479||65||Nikon 1 J5|
|Panasonic GX850« »||Four Thirds||15.8||4592||3448||4K/30p||23.2||13.3||586||73||Panasonic GX850|
|Panasonic GF7« »||Four Thirds||15.8||4592||3448||1080/60p||-||-||-||-||Panasonic GF7|
|Sony A7R IV« »||Full Frame||60.2||9504||6336||4K/30p||-||-||-||-||Sony A7R IV|
|Sony A7 III« »||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3730||96||Sony A7 III|
|Sony A7R III« »||Full Frame||42.2||7952||5304||4K/30p||26.0||14.7||3523||100||Sony A7R III|
|Sony A9« »||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92||Sony A9|
|Sony A99 II« »||Full Frame||42.2||7952||5304||4K/30p||25.4||13.4||2317||92||Sony A99 II|
|Sony A7R II« »||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98||Sony A7R II|
|Sony A7 II« »||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90||Sony A7 II|
|Sony A7S« »||Full Frame||12.0||4240||2832||1080/60p||23.9||13.2||3702||87||Sony A7S|
|Sony A99« »||Full Frame||24.0||6000||4000||1080/60p||25.0||14.0||1555||89||Sony A99|
|Sony A900« »||Full Frame||24.4||6048||4032||-||23.7||12.3||1431||79||Sony A900|
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, and both provide the same movie specifications (4K/30p).
Apart from body and sensor, cameras can and do differ across a range of features. For example, the A7S II has an electronic viewfinder (2400k 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 table below summarizes some of the other core capabilities of the Sony A7S II and YI M1 in connection with corresponding information for a sample of similar cameras.
|Sony A7S II»||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y||Sony A7S II|
|YI M1«||-||n||3.0||1040||fixed||Y||1/4000s||5.0||n||n||YI M1|
|Canon SX730« »||-||n||3.0||922||tilting||n||1/3200s||5.9||Y||Y||Canon SX730|
|Fujifilm X-A3« »||-||n||3.0||1040||tilting||Y||1/4000s||6.0||Y||n||Fujifilm X-A3|
|Nikon 1 J5« »||-||n||3.0||1037||tilting||Y||1/4000s||60.0||Y||n||Nikon 1 J5|
|Panasonic GX850« »||-||n||3.0||1040||tilting||Y||1/500s||10.0||Y||n||Panasonic GX850|
|Panasonic GF7« »||-||n||3.0||1040||tilting||Y||1/500s||5.8||Y||n||Panasonic GF7|
|Sony A7R IV« »||5760||n||3.0||1440||tilting||Y||1/8000s||10.0||n||Y||Sony A7R IV|
|Sony A7 III« »||2359||n||3.0||922||tilting||Y||1/8000s||10.0||n||Y||Sony A7 III|
|Sony A7R III« »||3686||n||3.0||1440||tilting||Y||1/8000s||10.0||n||Y||Sony A7R III|
|Sony A9« »||3686||n||3.0||1440||tilting||Y||1/8000s||20.0||n||Y||Sony A9|
|Sony A99 II« »||2400||Y||3.0||1229||full-flex||n||1/8000s||12.0||n||Y||Sony A99 II|
|Sony A7R II« »||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y||Sony A7R II|
|Sony A7 II« »||2400||n||3.0||1230||tilting||n||1/8000s||5.0||n||Y||Sony A7 II|
|Sony A7S« »||2400||n||3.0||921||tilting||n||1/8000s||5.0||n||n||Sony A7S|
|Sony A99« »||2359||Y||3.0||1229||full-flex||n||1/8000s||6.0||n||Y||Sony A99|
|Sony A900« »||optical||Y||3.0||922||fixed||n||1/8000s||5.0||n||Y||Sony A900|
One feature that differentiates the A7S II and the M1 is in-body image stabilization (IBIS). The A7S II reduces the risk of handshake-induced blur with all attached lenses, while the M1 has to rely on optical image stabilization in OIS-equipped lenses to achieve the same effect.
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 A7S II 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 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 A7S II writes its imaging data to SDXC or Memory Stick PRO Duo cards, while the M1 uses SDXC cards. The A7S II supports UHS-I cards (Ultra High Speed data transfer of up to 104 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 7S II and YI M1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Sony A7S II»||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7S II|
|YI M1«||Y||stereo||mono||-||-||micro||2.0||Y||-||Y||YI M1|
|Canon SX730« »||-||stereo||mono||-||-||micro||2.0||Y||Y||Y||Canon SX730|
|Fujifilm X-A3« »||Y||stereo||mono||-||-||micro||2.0||Y||-||-||Fujifilm X-A3|
|Nikon 1 J5« »||-||stereo||mono||-||-||micro||2.0||Y||Y||-||Nikon 1 J5|
|Panasonic GX850« »||-||stereo||mono||-||-||micro||2.0||Y||-||-||Panasonic GX850|
|Panasonic GF7« »||-||stereo||mono||-||-||micro||2.0||Y||Y||-||Panasonic GF7|
|Sony A7R IV« »||Y||stereo||mono||Y||Y||micro||3.1||Y||Y||Y||Sony A7R IV|
|Sony A7 III« »||Y||stereo||mono||Y||Y||micro||3.1||Y||Y||Y||Sony A7 III|
|Sony A7R III« »||Y||stereo||mono||Y||Y||micro||3.1||Y||Y||Y||Sony A7R III|
|Sony A9« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||Y||Sony A9|
|Sony A99 II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||Y||Sony A99 II|
|Sony A7R II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7R II|
|Sony A7 II« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7 II|
|Sony A7S« »||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7S|
|Sony A99« »||Y||stereo||mono||Y||Y||mini||2.0||-||-||-||Sony A99|
|Sony A900« »||Y||-||-||-||-||mini||2.0||-||-||-||Sony A900|
It is notable that the A7S II 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 A7S II and the M1 are recent models that are part of the current product line-up. The A7S II replaced the earlier Sony A7S, while the M1 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 Sony and YI websites.
So what conclusions can be drawn? Which of the two cameras – the Sony A7S II or the YI M1 – 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 Sony Alpha 7S II:
- Better image quality: Features bigger pixels on a larger sensor for higher quality imaging.
- Richer colors: The pixel size advantage translates into images with better, more accurate colors.
- More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
- Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
- 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 detailed LCD: Has a higher resolution rear screen (1229k vs 1040k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
- Sharper images: Has hand-shake reducing image stabilization built-in.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More heavily discounted: Has been on the market for longer (launched in September 2015).
Advantages of the YI M1:
- More detail: Has more megapixels (20.2 vs 12MP), which boosts linear resolution by 27%.
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More compact: Is smaller (114x64mm vs 127x96mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 346g or 55 percent) and is thus easier to take along.
- Longer lasting: Gets more shots (450 versus 370) out of a single battery charge.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- More affordable: Was introduced into a lower priced category (88 percent cheaper at launch).
- More modern: Was introduced somewhat (1 year) more recently.
If the count of relative strengths (bullet points above) is taken as a measure, the A7S II is the clear winner of the match-up (16 : 9 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 Sony A7S II 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 comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the A7S II or the M1. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.
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 (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.
|Sony A7S II»||+||-||4.5/5||5/5||5/5||Sep 2015||2,999||Sony A7S II|
|YI M1«||-||69/100||-||2.5/5||-||Sep 2016||349||YI M1|
|Canon SX730« »||+||-||4/5||-||4/5||Apr 2017||399||-||Canon SX730|
|Fujifilm X-A3« »||-||74/100||4.5/5||-||4/5||Aug 2016||399||-||Fujifilm X-A3|
|Nikon 1 J5« »||-||-||4.5/5||4/5||4.5/5||Apr 2015||399||-||Nikon 1 J5|
|Panasonic GX850« »||+||76/100||4.5/5||4/5||4.5/5||Jan 2017||549||Panasonic GX850|
|Panasonic GF7« »||+||-||4.5/5||4.5/5||4.5/5||Jan 2015||499||-||Panasonic GF7|
|Sony A7R IV« »||+||-||-||-||-||Jul 2019||3,499||Sony A7R IV|
|Sony A7 III« »||+ +||89/100||5/5||5/5||5/5||Feb 2018||1,999||Sony A7 III|
|Sony A7R III« »||+ +||90/100||4.5/5||5/5||5/5||Oct 2017||3,199||-||Sony A7R III|
|Sony A9« »||+ +||89/100||5/5||5/5||5/5||Apr 2017||4,499||Sony A9|
|Sony A99 II« »||-||85/100||4.5/5||4.5/5||4.5/5||Sep 2016||3,199||Sony A99 II|
|Sony A7R II« »||+ +||90/100||5/5||4.5/5||5/5||Jun 2015||3,199||-||Sony A7R II|
|Sony A7 II« »||+||82/100||4.5/5||5/5||5/5||Nov 2014||1,999||-||Sony A7 II|
|Sony A7S« »||-||86/100||4.5/5||4.5/5||5/5||Apr 2014||2,499||-||Sony A7S|
|Sony A99« »||-||84/100||4.5/5||o||4.5/5||Sep 2012||2,799||-||Sony A99|
|Sony A900« »||+ +||+ +||4.5/5||4/5||5/5||Sep 2008||2,999||-||Sony A900|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.|
The above review scores should be interpreted with care, 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.
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.
- Canon 30D vs YI M1
- Canon G1 X Mark II vs Sony A7S II
- Fujifilm X-A1 vs YI M1
- Fujifilm X-A3 vs Sony A7S II
- Leica V-LUX 1 vs Sony A7S II
- Leica V-LUX 2 vs Sony A7S II
- Nikon D3500 vs Sony A7S II
- Olympus E-M1 vs Sony A7S II
- Olympus XZ-1 vs Sony A7S II
- Panasonic LX10 vs YI M1
- Pentax MX-1 vs Sony A7S II
- Sony A7S II vs Sony RX0 II
Specifications: Sony A7S II 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 A7S II||YI M1|
|Camera Type||Mirrorless system camera||Mirrorless system camera|
|Camera Lens||Sony E mount lenses||Micro Four Thirds lenses|
|Launch Date||September 2015||September 2016|
|Launch Price||USD 2999||USD 349|
|Sensor Specs||Sony A7S II||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||12 Megapixels||20.2 Megapixels|
|Image Resolution||4240 x 2832 pixels||5184 x 3888 pixels|
|Pixel Pitch||8.40 μm||3.34 μm|
|Pixel Density||1.42 MP/cm2||8.96 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||4K/30p Video||4K/30p Video|
|ISO Setting||100-102400 ISO||100-25600 ISO|
|ISO Boost||50-409600 ISO||no Enhancement|
|DXO Sensor Quality (score)||85||..|
|DXO Color Depth (bits)||23.6||..|
|DXO Dynamic Range (EV)||13.3||..|
|DXO Low Light (ISO)||2993||..|
|Screen Specs||Sony A7S II||YI M1|
|Viewfinder Type||Electronic viewfinder||No viewfinder|
|Viewfinder Field of View||100%|
|Viewfinder Resolution||2400k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0 inch||3.0 inch|
|LCD Resolution||1229k dots||1040k dots|
|LCD Attachment||Tilting screen||Fixed screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Sony A7S II||YI M1|
|Autofocus System||Contrast-detect AF||Contrast-detect AF|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/8000/s||1/4000/s|
|Continuous Shooting||5 shutter flaps/s||5 shutter flaps/s|
|Electronic Shutter||YES||no E-Shutter|
|Time-Lapse Photography||no Intervalometer||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-I||no|
|Connectivity Specs||Sony A7S II||YI M1|
|USB Connector||USB 2.0||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||no Bluetooth||Bluetooth built-in|
|Body Specs||Sony A7S II||YI M1|
|Environmental Sealing||Weathersealed body||Not weather sealed|
|Battery Life (CIPA)||370 shots per charge||450 shots per charge|
|In-Camera Charging||USB charging||USB charging|
127 x 96 x 60 mm
(5.0 x 3.8 x 2.4 in)
114 x 64 x 34 mm
(4.5 x 2.5 x 1.3 in)
|Camera Weight||627 g (22.1 oz)||281 g (9.9 oz)|
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