Sony A7S II versus Sony RX10 IV
The Sony Alpha 7S II and the Sony Cyber-shot DSC-RX10 IV are two digital cameras that were officially introduced, respectively, in September 2015 and September 2017. The A7S II is a mirrorless interchangeable lens camera, while the RX10 IV is a fixed lens compact. The cameras are based on a full frame (A7S II) and an one-inch (RX10 IV) sensor. The A7S II has a resolution of 12 megapixel, whereas the RX10 IV provides 20 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.
Body comparison: Sony A7S II vs Sony RX10 IV
An illustration of the physical size and weight of the Sony A7S II and the Sony RX10 IV is provided in the side-by-side display below. Three successive views from the front, the top, and the rear are shown. All width, height and depth dimensions are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left – the A7S II – represents the basis or 100 percent across all the size and weight measures).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony RX10 IV is somewhat larger (3 percent) than the Sony A7S II. 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 and possibly misleading, as the RX10 IV has a lens build in, whereas the A7S II is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can find an overview of optics for the A7S II and their specifications in the Sony FE Lens Catalog.
The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
|Camera Body Specifications|
|Sony A7S II»||5.0 in||3.8 in||2.4 in||22.1 oz||370||Y||Sep 2015||2,999|
|Sony RX10 IV«||5.2 in||3.7 in||5.7 in||38.6 oz||400||Y||Sep 2017||1,699|
|Fujifilm X-Pro2« »||5.6 in||3.3 in||1.8 in||17.5 oz||350||Y||Jan 2016||1,699|
|Fujifilm X-T2« »||5.2 in||3.6 in||1.9 in||17.9 oz||340||Y||Jul 2016||1,599|
|Nikon D500« »||5.8 in||4.5 in||3.2 in||30.3 oz||1240||Y||Jan 2016||1,999|
|Olympus E-M1 II« »||5.3 in||3.6 in||2.6 in||20.2 oz||440||Y||Sep 2016||1,999|
|Sony A7 III« »||5.0 in||3.8 in||2.9 in||22.9 oz||610||Y||Feb 2018||1,999|
|Sony A9« »||5.0 in||3.8 in||2.5 in||23.7 oz||650||Y||Apr 2017||4,499|
|Sony A7R III« »||5.0 in||3.8 in||2.9 in||22.9 oz||650||Y||Oct 2017||3,199|
|Sony A99 II« »||5.6 in||4.1 in||3.0 in||29.9 oz||490||Y||Sep 2016||3,199|
|Sony A6300« »||4.7 in||2.6 in||1.9 in||14.3 oz||400||Y||Feb 2016||999||-|
|Sony A6500« »||4.7 in||2.6 in||2.1 in||16.0 oz||350||Y||Oct 2016||1,399|
|Sony RX10 III« »||5.2 in||3.7 in||5.0 in||37.1 oz||420||Y||Mar 2016||1,499||-|
|Sony A7R II« »||5.0 in||3.8 in||2.4 in||22.0 oz||290||Y||Jun 2015||3,199||-|
|Sony A7 II« »||5.0 in||3.8 in||2.4 in||21.1 oz||350||Y||Nov 2014||1,999||-|
|Sony A7S« »||5.0 in||3.7 in||1.9 in||17.2 oz||380||Y||Apr 2014||2,499||-|
|Sony A99« »||5.8 in||4.4 in||3.1 in||28.6 oz||500||Y||Sep 2012||2,799||-|
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 RX10 IV was launched at a lower price than the A7S II, despite having a lens build in. 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: Sony A7S II vs Sony RX10 IV
The size of the imaging sensor is a crucial determinant 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. 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 associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Sony A7S II features a full frame sensor and the Sony RX10 IV an one-inch sensor. The sensor area in the RX10 IV is 86 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 2.7. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Despite having a smaller sensor, the RX10 IV offers a higher resolution of 20 megapixel, compared with 12 MP of the A7S II. This megapixel advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 2.41μm versus 8.40μm for the A7S II). However, it should be noted that the RX10 IV is much more recent (by 2 years) than the A7S II, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.
For most 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 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 RX10 IV«||1-inch||20.0||5472||3648||4K/30p||-||-||-||-|
|Fujifilm X-Pro2« »||APS-C||24.0||6000||4000||1080/60p||-||-||-||-|
|Fujifilm X-T2« »||APS-C||24.0||6000||4000||4K/30p||-||-||-||-|
|Nikon D500« »||APS-C||20.7||5568||3712||4K/30p||24.0||14.0||1324||83|
|Olympus E-M1 II« »||Four Thirds||20.2||5184||3888||4K/30p||23.7||12.8||1312||80|
|Sony A7 III« »||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3730||96|
|Sony A9« »||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92|
|Sony A7R III« »||Full Frame||42.2||7952||5304||4K/30p||26.0||14.7||3523||100|
|Sony A99 II« »||Full Frame||42.2||7952||5304||4K/30p||25.4||13.4||2317||92|
|Sony A6300« »||APS-C||24.0||6000||4000||4K/30p||24.4||13.7||1437||85|
|Sony A6500« »||APS-C||24.0||6000||4000||4K/30p||24.5||13.7||1405||85|
|Sony RX10 III« »||1-inch||20.0||5472||3648||4K/30p||23.1||12.6||472||70|
|Sony A7R II« »||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
|Sony A7 II« »||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|Sony A7S« »||Full Frame||12.0||4240||2832||1080/60p||23.9||13.2||3702||87|
|Sony A99« »||Full Frame||24.0||6000||4000||1080/60p||25.0||14.0||1555||89|
Many modern cameras are not only capable of taking still images, but can also record movies. 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).
Feature comparison: Sony A7S II vs Sony RX10 IV
Apart from body and sensor, cameras can and do differ across a range of features. The two cameras under consideration are similar with respect to both having an electronic viewfinder. However, the one in the A7S II offers a slightly higher resolution than the one in the RX10 IV (2400k vs 2359k dots). The following table reports on some other key feature differences and similarities of the Sony A7S II, the Sony RX10 IV, and comparable cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.
|Sony A7S II»||2400||n||3.0||1229||tilting||n||8000||5.0||n||Y|
|Sony RX10 IV«||2359||Y||3.0||1440||tilting||Y||2000||24.0||Y||Y|
|Fujifilm X-Pro2« »||2360||n||3.0||1620||fixed||n||8000||8.0||n||n|
|Fujifilm X-T2« »||2360||n||3.0||1040||tilting||n||8000||14.0||n||n|
|Nikon D500« »||optical||Y||3.2||2359||tilting||Y||8000||10.0||n||n|
|Olympus E-M1 II« »||2360||n||3.0||1037||swivel||Y||8000||18.0||n||Y|
|Sony A7 III« »||2359||n||3.0||922||tilting||Y||8000||10.0||n||Y|
|Sony A9« »||3686||n||3.0||1440||tilting||Y||8000||20.0||n||Y|
|Sony A7R III« »||3686||n||3.0||1440||tilting||Y||8000||10.0||n||Y|
|Sony A99 II« »||2400||Y||3.0||1229||full-flex||n||8000||12.0||n||Y|
|Sony A6300« »||2300||n||3.0||922||tilting||n||4000||11.0||Y||n|
|Sony A6500« »||2300||n||3.0||922||tilting||Y||4000||11.0||Y||Y|
|Sony RX10 III« »||2359||Y||3.0||1229||tilting||n||2000||14.0||Y||Y|
|Sony A7R II« »||2400||n||3.0||1229||tilting||n||8000||5.0||n||Y|
|Sony A7 II« »||2400||n||3.0||1230||tilting||n||8000||5.0||n||Y|
|Sony A7S« »||2400||n||3.0||921||tilting||n||8000||5.0||n||n|
|Sony A99« »||2359||Y||3.0||1229||full-flex||n||8000||6.0||n||Y|
Both the A7S II and the RX10 IV are current models that good online retailers will have in stock. You can check the latest prices, for example, at amazon. The A7S II replaced the earlier Sony A7S, while the RX10 IV followed on from the Sony RX10 III.
Review summary: Sony A7S II vs Sony RX10 IV
So what conclusions can be drawn? Is there a clear favorite between the Sony A7S II and the Sony RX10 IV? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Sony Alpha 7S II:
- Better low-light imaging: Features bigger pixels on a larger sensor for better high-ISO images.
- Faster shutter: Has higher mechanical shutter speed (8000/sec vs 2000/sec) to freeze action.
- More flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
- More heavily discounted: Has been available for much longer (launched in September 2015).
Reasons to prefer the Sony Cyber-shot DSC-RX10 IV:
- More detail: Has more megapixels (20 vs 12MP), which boosts linear resolution by 29%.
- Easier setting verification: Has a control panel on top to check shooting parameters.
- More detailed LCD: Has a higher resolution rear screen (1440k vs 1229k dots).
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- Faster burst: Shoots at higher frequency (24 vs 5 flaps/sec) to capture the decisive moment.
- Ready to shoot: Has an integrated lens, whereas the A7S II necessitates an extra lens.
- Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
- More affordable: Was introduced at a lower price, despite coming with a build-in lens.
- More modern: Reflects 2 years of technical progress since the A7S II launch.
If the count of relative strengths (bullet points above) is taken as a measure, the RX10 IV is the clear winner of the contest (9 : 4 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.
In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the A7S II and the RX10 IV in practical situations. 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 adjacent table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). The detailed reviews can be accessed by clicking on the site logo in the table header.
|Sony A7S II»||Rec||-||4.5/5||5/5||5/5||Sep 2015||2,999|
|Sony RX10 IV«||Rec||84/100||4.5/5||-||5/5||Sep 2017||1,699|
|Fujifilm X-Pro2« »||Rec||83/100||4.5/5||4.5/5||4.5/5||Jan 2016||1,699|
|Fujifilm X-T2« »||HiRec||86/100||4.5/5||5/5||5/5||Jul 2016||1,599|
|Nikon D500« »||HiRec||91/100||4.5/5||5/5||5/5||Jan 2016||1,999|
|Olympus E-M1 II« »||HiRec||85/100||4.5/5||5/5||4.5/5||Sep 2016||1,999|
|Sony A7 III« »||HiRec||89/100||5/5||-||5/5||Feb 2018||1,999|
|Sony A9« »||HiRec||89/100||5/5||5/5||5/5||Apr 2017||4,499|
|Sony A7R III« »||HiRec||90/100||4.5/5||5/5||5/5||Oct 2017||3,199|
|Sony A99 II« »||-||85/100||4.5/5||4.5/5||4.5/5||Sep 2016||3,199|
|Sony A6300« »||Rec||85/100||5/5||5/5||5/5||Feb 2016||999||-|
|Sony A6500« »||HiRec||85/100||4.5/5||5/5||4.5/5||Oct 2016||1,399|
|Sony RX10 III« »||Rec||84/100||4.5/5||4.5/5||4.5/5||Mar 2016||1,499||-|
|Sony A7R II« »||HiRec||90/100||5/5||4.5/5||5/5||Jun 2015||3,199||-|
|Sony A7 II« »||Rec||82/100||4.5/5||5/5||5/5||Nov 2014||1,999||-|
|Sony A7S« »||-||86/100||4.5/5||4.5/5||5/5||Apr 2014||2,499||-|
|Sony A99« »||-||84/100||4.5/5||rev||4.5/5||Sep 2012||2,799||-|
Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. 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 would like to check on the differences and similarities of other camera models, just use the search menu below. An an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool. If the camera you are interested in is not available, kindly get in touch, and I will try to locate and add the respective data to the application.
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