Canon SX420 vs Sony RX10 III
The Canon PowerShot SX420 IS and the Sony Cyber-shot DSC-RX10 III are two digital cameras that were announced, respectively, in January 2016 and March 2016. Both the SX420 and the RX10 III are fixed lens compact cameras that are based on a 1/2.3-inch (SX420) and an one-inch (RX10 III) sensor. The Canon has a resolution of 19.9 megapixels, whereas the Sony provides 20 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 Canon PowerShot SX420 IS and the Sony Cyber-shot DSC-RX10 III? 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.
The side-by-side display below illustrates the physical size and weight of the Canon SX420 and the Sony RX10 III. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.
The SX420 can be obtained in two different colors (black, red), while the RX10 III 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 Sony RX10 III is considerably larger (74 percent) than the Canon SX420. Moreover, the RX10 III is substantially heavier (223 percent) than the SX420. It is noteworthy in this context that the RX10 III is splash and dust-proof, while the SX420 does not feature any corresponding weather-sealing.
Concerning battery life, the SX420 gets 195 shots out of its NB-11LH battery, while the RX10 III can take 420 images on a single charge of its NP-FW50 power pack. The power pack in the RX10 III can be charged via the USB port, 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. 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.
|1.||Canon SX420||104 mm||69 mm||85 mm||325 g||195||n||Jan 2016||299|
|2.||Sony RX10 III||133 mm||94 mm||127 mm||1051 g||420||Y||Mar 2016||1,499|
|3.||Canon SX430||104 mm||69 mm||85 mm||323 g||195||n||Jan 2017||299|
|4.||Canon SX730||110 mm||64 mm||40 mm||300 g||250||n||Apr 2017||399|
|5.||Canon G7 X Mark II||106 mm||61 mm||42 mm||319 g||265||n||Feb 2016||699|
|6.||Canon SX620||97 mm||57 mm||28 mm||182 g||295||n||May 2016||279|
|7.||Canon SX720||110 mm||64 mm||36 mm||270 g||250||n||Feb 2016||379|
|8.||Canon G5 X||112 mm||76 mm||44 mm||353 g||210||n||Oct 2015||799|
|9.||Canon SX410||104 mm||69 mm||85 mm||325 g||185||n||Feb 2015||279|
|10.||Canon SX610||105 mm||61 mm||27 mm||191 g||270||n||Jan 2015||249|
|11.||Canon SX710||113 mm||66 mm||35 mm||269 g||230||n||Jan 2015||349|
|12.||Panasonic ZS70||112 mm||67 mm||41 mm||322 g||380||n||Apr 2017||449|
|13.||Sony RX10 IV||133 mm||94 mm||145 mm||1095 g||400||Y||Sep 2017||1,699|
|14.||Sony RX0||59 mm||41 mm||30 mm||110 g||240||Y||Aug 2017||699|
|15.||Sony RX100 V||102 mm||58 mm||41 mm||299 g||220||n||Oct 2016||999|
|16.||Sony RX10 II||129 mm||88 mm||102 mm||813 g||400||Y||Jun 2015||1,299|
|17.||Sony RX10||129 mm||88 mm||102 mm||813 g||420||Y||Oct 2013||1,299|
|Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
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 SX420 was launched at a markedly lower price (by 80 percent) than the RX10 III, 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 size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better 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 Canon SX420 features a 1/2.3-inch sensor and the Sony RX10 III an one-inch sensor. The sensor area in the RX10 III is 314 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 5.6 and 2.7. The sensor in the SX420 has a native 4:3 aspect ratio, while the one in the RX10 III offers a 3:2 aspect.
With 20MP, the RX10 III offers a higher resolution than the SX420 (19.9MP), but the RX10 III nevertheless has larger individual pixels (pixel pitch of 2.41μm versus 1.19μm for the SX420) due to its larger sensor. It is noteworthy in this context that the two cameras were released in close succession, so that their sensors are from the same technological generation. Coming back to sensor resolution, it should be mentioned that the SX420 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The Canon PowerShot SX420 IS has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Sony Cyber-shot DSC-RX10 III are ISO 100 to ISO 12800, with the possibility to increase the ISO range to 64-25600.
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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.
|2.||Sony RX10 III||1-inch||20.0||5472||3648||4K/30p||23.1||12.6||472||70|
|5.||Canon G7 X Mark II||1-inch||20.0||5472||3648||1080/60p||21.8||11.9||260||62|
|8.||Canon G5 X||1-inch||20.0||5472||3648||1080/60p||21.8||11.9||227||61|
|13.||Sony RX10 IV||1-inch||20.0||5472||3648||4K/30p||22.0||12.2||408||63|
|15.||Sony RX100 V||1-inch||20.0||5472||3648||4K/30p||22.8||12.4||586||70|
|16.||Sony RX10 II||1-inch||20.0||5472||3648||4K/30p||23.0||12.6||531||70|
|Note: DXO values in italics represent estimates based on sensor size and age.|
Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the RX10 III provides a better video resolution than the SX420. It can shoot movie footage at 4K/30p, while the Canon is limited to 720/25p.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the RX10 III has an electronic viewfinder (2359k dots), which can be very helpful when shooting in bright sunlight. In contrast, the SX420 relies on live view and the rear LCD for framing. The table below summarizes some of the other core capabilities of the Canon SX420 and Sony RX10 III in connection with corresponding information for a sample of similar cameras.
|1.||Canon SX420||none||n||3.0 / 230||fixed||n||1/4000s||0.5/s||Y||Y|
|2.||Sony RX10 III||2359||Y||3.0 / 1229||tilting||n||1/2000s||14.0/s||Y||Y|
|3.||Canon SX430||none||n||3.0 / 230||fixed||n||1/4000s||0.5/s||Y||Y|
|4.||Canon SX730||none||n||3.0 / 922||tilting||n||1/3200s||5.9/s||Y||Y|
|5.||Canon G7 X Mark II||none||n||3.0 / 1040||tilting||Y||1/2000s||8.0/s||Y||Y|
|6.||Canon SX620||none||n||3.0 / 922||fixed||n||1/2000s||2.5/s||Y||Y|
|7.||Canon SX720||none||n||3.0 / 922||fixed||n||1/3200s||5.9/s||Y||Y|
|8.||Canon G5 X||2360||n||3.0 / 1040||swivel||Y||1/2000s||5.9/s||Y||Y|
|9.||Canon SX410||none||n||3.0 / 230||fixed||n||1/4000s||0.5/s||Y||Y|
|10.||Canon SX610||none||n||3.0 / 922||fixed||n||1/2000s||2.5/s||Y||Y|
|11.||Canon SX710||none||n||3.0 / 922||fixed||n||1/3200s||6.0/s||Y||Y|
|12.||Panasonic ZS70||1166||n||3.0 / 1040||tilting||Y||1/2000s||10.0/s||Y||Y|
|13.||Sony RX10 IV||2359||Y||3.0 / 1440||tilting||Y||1/2000s||24.0/s||Y||Y|
|14.||Sony RX0||none||n||1.5 / 230||fixed||n||..||5.5/s||n||n|
|15.||Sony RX100 V||2359||n||3.0 / 1229||tilting||n||1/2000s||24.0/s||Y||Y|
|16.||Sony RX10 II||2359||Y||3.0 / 1229||tilting||n||1/3200s||14.0/s||Y||Y|
|17.||Sony RX10||1440||Y||3.0 / 1229||tilting||n||1/3200s||10.0/s||Y||Y|
|Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.|
One feature that is present on the RX10 III, but is missing on the SX420 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, the RX10 III 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).
Both the SX420 and the RX10 III have zoom lenses built in. The SX420 has a 24-1008mm f/3.5-6.6 optic and the RX10 III offers a 24-600mm f/2.4-4.0 (focal lengths in full frame equivalent terms). Hence, the Canon and Sony provide the same view at the wide-angle end, but the Sony has less tele-photo reach at the long end. The RX10 III offers the faster maximum aperture.
The SX420 writes its imaging data to SDXC cards, while the RX10 III uses SDXC or Memory Stick PRO Duo cards. The RX10 III supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the SX420 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 Canon PowerShot SX420 IS and Sony Cyber-shot DSC-RX10 III and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Canon SX420||-||mono / mono||-||-||-||2.0||Y||Y||-|
|2.||Sony RX10 III||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|3.||Canon SX430||-||mono / mono||-||-||-||2.0||Y||Y||-|
|4.||Canon SX730||-||stereo / mono||-||-||micro||2.0||Y||Y||Y|
|5.||Canon G7 X Mark II||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|6.||Canon SX620||-||mono / mono||-||-||micro||2.0||Y||Y||-|
|7.||Canon SX720||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|8.||Canon G5 X||Y||stereo / mono||-||-||mini||2.0||Y||Y||-|
|9.||Canon SX410||-||stereo / mono||-||-||-||2.0||-||-||-|
|10.||Canon SX610||-||- / -||-||-||micro||2.0||Y||Y||-|
|11.||Canon SX710||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|12.||Panasonic ZS70||-||stereo / mono||-||-||micro||2.0||Y||-||-|
|13.||Sony RX10 IV||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|14.||Sony RX0||-||stereo / mono||Y||-||micro||2.0||Y||-||Y|
|15.||Sony RX100 V||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|16.||Sony RX10 II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|17.||Sony RX10||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
It is notable that the RX10 III has a microphone port, which can help to improve the quality of audio recordings by attaching an external microphone. The SX420 does not feature such a mic input.
The RX10 III is a recent model that features in the current product line-up of Sony. In contrast, the SX420 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the SX420 was succeeded by the Canon SX430. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Canon and Sony websites.
So what is the bottom line? Is there a clear favorite between the Canon SX420 and the Sony RX10 III? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.
Advantages of the Canon PowerShot SX420 IS:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
- More tele-reach: Has a longer tele-lens for perspective compression and subject magnification.
- More compact: Is smaller (104x69mm vs 133x94mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 726g or 69 percent) and hence easier to carry around.
- More affordable: Was introduced into a lower priced category (80 percent cheaper at launch).
Reasons to prefer the Sony Cyber-shot DSC-RX10 III:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- 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 video: Provides higher definition movie capture (4K/30p vs 720/25p).
- 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.
- Easier setting verification: Features a control panel on top to check shooting parameters.
- More detailed LCD: Has a higher resolution rear screen (1229k vs 230k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Faster burst: Shoots at higher frequency (14 vs 0.5 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Better light gathering: Has a lens with a wider maximum aperture (f/2.4 vs f/3.5).
- Longer lasting: Gets more shots (420 versus 195) out of a single battery charge.
- Easier travel charging: Can be conveniently charged via its USB port.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
If the count of relative strengths (bullet points above) is taken as a measure, the RX10 III is the clear winner of the contest (20 : 6 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. A professional sports photographer will view the differences between cameras in a way that diverges from the perspective of a street photog, and a person interested in family portraits has distinct needs from a landscape 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 Canon SX420 and the Sony RX10 III place the cameras among the top in their class? Find out in the latest Best Superzoom 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 SX420 or the RX10 III perform in practice. 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 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.
|1.||Canon SX420||..||..||..||..||..||3/5||Jan 2016||299|
|2.||Sony RX10 III||5/5||+||..||84/100||4.5/5||4.5/5||Mar 2016||1,499|
|3.||Canon SX430||..||..||..||..||3.5/5||3.5/5||Jan 2017||299|
|4.||Canon SX730||..||+||..||..||4/5||4/5||Apr 2017||399|
|5.||Canon G7 X Mark II||4.5/5||+ +||..||81/100||4.5/5||4.5/5||Feb 2016||699|
|6.||Canon SX620||..||..||..||..||..||4/5||May 2016||279|
|7.||Canon SX720||..||+||..||..||4/5||4.5/5||Feb 2016||379|
|8.||Canon G5 X||5/5||+ +||..||78/100||4.5/5||4.5/5||Oct 2015||799|
|9.||Canon SX410||..||o||..||..||..||..||Feb 2015||279|
|10.||Canon SX610||..||..||..||..||4/5||4/5||Jan 2015||249|
|11.||Canon SX710||..||+||..||..||4/5||3.5/5||Jan 2015||349|
|12.||Panasonic ZS70||..||+ +||..||..||4/5||4/5||Apr 2017||449|
|13.||Sony RX10 IV||5/5||+||..||84/100||4.5/5||5/5||Sep 2017||1,699|
|14.||Sony RX0||..||..||..||..||3.5/5||4/5||Aug 2017||699|
|15.||Sony RX100 V||4.5/5||+ +||..||83/100||4/5||4.5/5||Oct 2016||999|
|16.||Sony RX10 II||5/5||+ +||..||82/100||4.5/5||4/5||Jun 2015||1,299|
|17.||Sony RX10||5/5||+||..||80/100||4.5/5||4.5/5||Oct 2013||1,299|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated 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. A score, therefore, has to be seen in close connection to the price and market introduction time 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? If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. As an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool.
- Canon SX420 vs Fujifilm GFX 100
- Canon SX420 vs Fujifilm X70
- Canon SX420 vs Nikon D100
- Canon SX420 vs Panasonic G10
- Canon SX420 vs Sony A6100
- Canon SX420 vs Sony A68
- Leica C-LUX vs Sony RX10 III
- Leica M8 vs Sony RX10 III
- Nikon 1 V3 vs Sony RX10 III
- Nikon P900 vs Sony RX10 III
- Sony A3000 vs Sony RX10 III
- Sony A9 vs Sony RX10 III
Specifications: Canon SX420 vs Sony RX10 III
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||Canon SX420||Sony RX10 III|
|Camera Type||Fixed lens compact camera||Fixed lens compact camera|
|Camera Lens||24-1008mm f/3.5-6.6||24-600mm f/2.4-4.0|
|Launch Date||January 2016||March 2016|
|Launch Price||USD 299||USD 1,499|
|Sensor Specs||Canon SX420||Sony RX10 III|
|Sensor Format||1/2.3" Sensor||1" Sensor|
|Sensor Size||6.17 x 4.55 mm||13.2 x 8.8 mm|
|Sensor Area||28.0735 mm2||116.16 mm2|
|Sensor Diagonal||7.7 mm||15.9 mm|
|Sensor Resolution||19.9 Megapixels||20 Megapixels|
|Image Resolution||5152 x 3864 pixels||5472 x 3648 pixels|
|Pixel Pitch||1.19 μm||2.41 μm|
|Pixel Density||70.91 MP/cm2||17.18 MP/cm2|
|Moiré control||no AA filter||Anti-Alias filter|
|Movie Capability||720/25p Video||4K/30p Video|
|ISO Setting||100 - 1,600 ISO||100 - 12,800 ISO|
|ISO Boost||no Enhancement||64 - 25,600 ISO|
|Image Processor||DIGIC 4+||BIONZ X|
|DXO Sensor Quality (score)||..||70|
|DXO Color Depth (bits)||..||23.1|
|DXO Dynamic Range (EV)||..||12.6|
|DXO Low Light (ISO)||..||472|
|Screen Specs||Canon SX420||Sony RX10 III|
|Viewfinder Type||no viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%|
|Viewfinder Resolution||2359k dots|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||230k dots||1229k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Shooting Specs||Canon SX420||Sony RX10 III|
|Focus System||Contrast-detect AF||Contrast-detect AF|
|Manual Focusing Aid||no Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/2000s|
|Continuous Shooting||0.5 shutter flaps/s||14 shutter flaps/s|
|Electronic Shutter||no E-Shutter||up to 1/32000s|
|Fill Flash||Built-in Flash||Built-in Flash|
|Storage Medium||SDXC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||no||UHS-I|
|Connectivity Specs||Canon SX420||Sony RX10 III|
|External Flash||no Hotshoe||Hotshoe|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no HDMI||micro HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Headphone Socket||no Headphone port||Headphone port|
|Wifi Support||Wifi built-in||Wifi built-in|
|Near-Field Communication||NFC built-in||NFC built-in|
|Body Specs||Canon SX420||Sony RX10 III|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||195 shots per charge||420 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
104 x 69 x 85 mm
(4.1 x 2.7 x 3.3 in)
133 x 94 x 127 mm
(5.2 x 3.7 x 5.0 in)
|Camera Weight||325 g (11.5 oz)||1051 g (37.1 oz)|
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