Canon SX420 vs Sony A900
The Canon PowerShot SX420 IS and the Sony Alpha A900 are two digital cameras that were officially introduced, respectively, in January 2016 and September 2008. The SX420 is a fixed lens compact, while the A900 is a DSLR. The cameras are based on a 1/2.3-inch (SX420) and a full frame (A900) sensor. The Canon has a resolution of 19.9 megapixels, whereas the Sony provides 24.4 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 Alpha A900? 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 A900. 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 SX420 can be obtained in two different colors (black, red), while the A900 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 A900 is considerably larger (154 percent) than the Canon SX420. It is noteworthy in this context that the A900 is splash and dust-proof, while the SX420 does not feature any corresponding weather-sealing.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the SX420 has a lens built in, whereas the A900 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.
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.||Canon SX420||104 mm||69 mm||85 mm||325 g||195||n||Jan 2016||299|
|2.||Sony A900||156 mm||117 mm||82 mm||895 g||880||Y||Sep 2008||2,999|
|3.||Canon SX430||104 mm||69 mm||85 mm||323 g||195||n||Jan 2017||299|
|4.||Canon M100||108 mm||67 mm||35 mm||302 g||295||n||Aug 2017||499|
|5.||Canon SX730||110 mm||64 mm||40 mm||300 g||250||n||Apr 2017||399|
|6.||Canon G7 X Mark II||106 mm||61 mm||42 mm||319 g||265||n||Feb 2016||699|
|7.||Canon SX620||97 mm||57 mm||28 mm||182 g||295||n||May 2016||279|
|8.||Canon SX720||110 mm||64 mm||36 mm||270 g||250||n||Feb 2016||379|
|9.||Canon G5 X||112 mm||76 mm||44 mm||353 g||210||n||Oct 2015||799|
|10.||Canon SX410||104 mm||69 mm||85 mm||325 g||185||n||Feb 2015||279|
|11.||Canon SX610||105 mm||61 mm||27 mm||191 g||270||n||Jan 2015||249|
|12.||Canon SX710||113 mm||66 mm||35 mm||269 g||230||n||Jan 2015||349|
|13.||Canon 5D Mark II||152 mm||114 mm||75 mm||850 g||850||Y||Sep 2008||3,499|
|14.||Panasonic S1||149 mm||110 mm||97 mm||1017 g||400||Y||Feb 2019||2,499|
|15.||Sony A99 II||143 mm||104 mm||76 mm||849 g||490||Y||Sep 2016||3,199|
|16.||Sony A99||147 mm||111 mm||78 mm||812 g||500||Y||Sep 2012||2,799|
|17.||Sony A850||156 mm||117 mm||82 mm||895 g||880||Y||Aug 2009||1,999|
|Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
Any camera decision will naturally be influenced heavily by the price. The retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The SX420 was launched at a lower price than the A900, despite having a lens built 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.
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. 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 A900 a full frame sensor. The sensor area in the A900 is 2979 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 5.6 and 1.0. The sensor in the SX420 has a native 4:3 aspect ratio, while the one in the A900 offers a 3:2 aspect.
With 24.4MP, the A900 offers a higher resolution than the SX420 (19.9MP), but the A900 nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 1.19μm for the SX420) due to its larger sensor. However, the SX420 is a much more recent model (by 7 years and 3 months) than the A900, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. 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 resolution advantage of the Sony A900 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A900 for good quality output (200 dots per inch) amounts to 30.2 x 20.2 inches or 76.8 x 51.2 cm, for very good quality (250 dpi) 24.2 x 16.1 inches or 61.4 x 41 cm, and for excellent quality (300 dpi) 20.2 x 13.4 inches or 51.2 x 34.1 cm. The corresponding values for the Canon SX420 are 25.8 x 19.3 inches or 65.4 x 49.1 cm for good quality, 20.6 x 15.5 inches or 52.3 x 39.3 cm for very good quality, and 17.2 x 12.9 inches or 43.6 x 32.7 cm for excellent quality prints.
The Canon PowerShot SX420 IS has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the Sony Alpha A900 are ISO 200 to ISO 3200, with the possibility to increase the ISO range to 100-6400.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|2.||Sony A900||Full Frame||24.4||6048||4032||none||23.7||12.3||1431||79|
|6.||Canon G7 X Mark II||1-inch||20.0||5472||3648||1080/60p||21.8||11.9||260||62|
|9.||Canon G5 X||1-inch||20.0||5472||3648||1080/60p||21.8||11.9||227||61|
|13.||Canon 5D Mark II||Full Frame||21.0||5616||3744||1080/30p||23.7||11.9||1815||79|
|14.||Panasonic S1||Full Frame||24.0||6000||4000||4K/60p||25.2||14.5||3333||95|
|15.||Sony A99 II||Full Frame||42.2||7952||5304||4K/30p||25.4||13.4||2317||92|
|16.||Sony A99||Full Frame||24.0||6000||4000||1080/60p||25.0||14.0||1555||89|
|17.||Sony A850||Full Frame||24.4||6048||4032||none||23.8||12.2||1415||79|
|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. The SX420 indeed provides movie recording capabilities, while the A900 does not. The highest resolution format that the SX420 can use is 720/25p.
Beyond body and sensor, cameras can and do differ across a range of features. For example, the A900 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the SX420 relies on live view and the rear LCD for framing. The adjacent table lists some of the other core features of the Canon SX420 and Sony A900 along with similar information for a selection of comparators.
|1.||Canon SX420||none||n||3.0 / 230||fixed||n||1/4000s||0.5||Y||Y|
|2.||Sony A900||optical||Y||3.0 / 922||fixed||n||1/8000s||5.0||n||Y|
|3.||Canon SX430||none||n||3.0 / 230||fixed||n||1/4000s||0.5||Y||Y|
|4.||Canon M100||none||n||3.0 / 1040||tilting||Y||1/4000s||6.1||Y||n|
|5.||Canon SX730||none||n||3.0 / 922||tilting||n||1/3200s||5.9||Y||Y|
|6.||Canon G7 X Mark II||none||n||3.0 / 1040||tilting||Y||1/2000s||8.0||Y||Y|
|7.||Canon SX620||none||n||3.0 / 922||fixed||n||1/2000s||2.5||Y||Y|
|8.||Canon SX720||none||n||3.0 / 922||fixed||n||1/3200s||5.9||Y||Y|
|9.||Canon G5 X||2360||n||3.0 / 1040||swivel||Y||1/2000s||5.9||Y||Y|
|10.||Canon SX410||none||n||3.0 / 230||fixed||n||1/4000s||0.5||Y||Y|
|11.||Canon SX610||none||n||3.0 / 922||fixed||n||1/2000s||2.5||Y||Y|
|12.||Canon SX710||none||n||3.0 / 922||fixed||n||1/3200s||6.0||Y||Y|
|13.||Canon 5D Mark II||optical||Y||3.0 / 920||fixed||n||1/8000s||3.9||n||n|
|14.||Panasonic S1||5760||Y||3.2 / 2100||full-flex||Y||1/8000s||9.0||n||Y|
|15.||Sony A99 II||2400||Y||3.0 / 1229||full-flex||n||1/8000s||12.0||n||Y|
|16.||Sony A99||2359||Y||3.0 / 1229||full-flex||n||1/8000s||6.0||n||Y|
|17.||Sony A850||optical||Y||3.0 / 922||fixed||n||1/8000s||3.0||n||Y|
One difference between the cameras concerns the presence of an on-board flash. The SX420 has one, while the A900 does not. While the built-in flash of the SX420 is not very powerful, it can at times be useful as a fill-in light.
The SX420 writes its imaging data to SDXC cards, while the A900 uses Compact Flash or Memory Stick PRO Duo cards. The A900 features dual card slots, which can be very useful in case a memory card fails. In contrast, the SX420 only has one slot.
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 Alpha A900 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 A900||Y||- / -||-||-||mini||2.0||-||-||-|
|3.||Canon SX430||-||mono / mono||-||-||-||2.0||Y||Y||-|
|4.||Canon M100||-||stereo / mono||-||-||micro||2.0||Y||Y||Y|
|5.||Canon SX730||-||stereo / mono||-||-||micro||2.0||Y||Y||Y|
|6.||Canon G7 X Mark II||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|7.||Canon SX620||-||mono / mono||-||-||micro||2.0||Y||Y||-|
|8.||Canon SX720||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|9.||Canon G5 X||Y||stereo / mono||-||-||mini||2.0||Y||Y||-|
|10.||Canon SX410||-||stereo / mono||-||-||-||2.0||-||-||-|
|11.||Canon SX610||-||- / -||-||-||micro||2.0||Y||Y||-|
|12.||Canon SX710||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|13.||Canon 5D Mark II||Y||mono / mono||Y||-||mini||2.0||-||-||-|
|14.||Panasonic S1||Y||stereo / mono||Y||Y||full||3.1||Y||-||Y|
|15.||Sony A99 II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||Y|
|16.||Sony A99||Y||stereo / mono||Y||Y||mini||2.0||-||-||-|
|17.||Sony A850||Y||- / -||-||-||mini||2.0||-||-||-|
It is notable that the SX420 offers wifi support, while the A900 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.
Studio photographers will appreciate that the Sony A900 (unlike the SX420) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Both the SX420 and the A900 have been discontinued, but can regularly be found used on eBay. The A900 was replaced by the Sony A99, while the SX420 was followed 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 conclusions can be drawn? Is there a clear favorite between the Canon SX420 and the Sony A900? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Advantages of the Canon PowerShot SX420 IS:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Broader imaging potential: Can record not only still images but also 720/25p movies.
- Ready to shoot: Comes with a built-in lens, while the A900 requires a separate lens.
- More compact: Is smaller (104x69mm vs 156x117mm) and thus needs less room in the bag.
- Less heavy: Is lighter even though it comes with a built-in lens (unlike the A900).
- Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- More affordable: Was introduced at a lower price, despite coming with a built-in lens.
- More modern: Reflects 7 years and 3 months of technical progress since the A900 launch.
Arguments in favor of the Sony Alpha A900:
- More detail: Has more megapixels (24.4 vs 19.9MP), which boosts linear resolution by 13%.
- 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.
- Easier framing: Has an optical 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 (922k vs 230k dots).
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
- Faster burst: Shoots at higher frequency (5 vs 0.5 flaps/sec) to capture the decisive moment.
- More flexible: Makes it possible to change lenses and thus to use specialty optics.
- Longer lasting: Gets more shots (880 versus 195) out of a single battery charge.
- 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.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- More heavily discounted: Has been around for much longer (launched in September 2008).
If the number of relative strengths (bullet points above) is taken as a guide, the A900 is the clear winner of the contest (18 : 10 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 Canon SX420 and the Sony A900 place the cameras among the top in their class? Find out in the latest Best Superzoom Camera and Best DSLR Camera listings 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 SX420 or the A900. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.
This is where reviews by experts come in. The adjacent summary-table relays the overall verdicts of several of the most popular camera 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 A900||..||+ +||..||+ +||4.5/5||5/5||Sep 2008||2,999|
|3.||Canon SX430||..||..||..||..||3.5/5||3.5/5||Jan 2017||299|
|4.||Canon M100||3/5||+||..||..||4/5||3.5/5||Aug 2017||499|
|5.||Canon SX730||..||+||..||..||4/5||4/5||Apr 2017||399|
|6.||Canon G7 X Mark II||4.5/5||+ +||..||81/100||4.5/5||4.5/5||Feb 2016||699|
|7.||Canon SX620||..||..||..||..||..||4/5||May 2016||279|
|8.||Canon SX720||..||+||..||..||4/5||4.5/5||Feb 2016||379|
|9.||Canon G5 X||5/5||+ +||..||78/100||4.5/5||4.5/5||Oct 2015||799|
|10.||Canon SX410||..||o||..||..||..||..||Feb 2015||279|
|11.||Canon SX610||..||..||..||..||4/5||4/5||Jan 2015||249|
|12.||Canon SX710||..||+||..||..||4/5||3.5/5||Jan 2015||349|
|13.||Canon 5D Mark II||4/5||91/100||..||79/100||4/5||..||Sep 2008||3,499|
|14.||Panasonic S1||4.5/5||+ +||4.5/5||88/100||4.5/5||4/5||Feb 2019||2,499|
|15.||Sony A99 II||..||..||4.5/5||85/100||4.5/5||4.5/5||Sep 2016||3,199|
|16.||Sony A99||5/5||..||..||84/100||4.5/5||4.5/5||Sep 2012||2,799|
|17.||Sony A850||3/5||..||..||75/100||..||4.5/5||Aug 2009||1,999|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The above review scores should be interpreted with care, though. The ratings are only valid when referring to cameras in the same category and of the same age. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, please note that some of the review sites have changed their methodology and reporting over time.
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. 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 1D vs Sony A900
- Canon 70D vs Sony A900
- Canon D30 vs Sony A900
- Canon SX420 vs Fujifilm X-A2
- Canon SX420 vs Fujifilm X-T30
- Canon SX420 vs Nikon D3000
- Canon SX420 vs Olympus E-520
- Canon SX420 vs Panasonic FZ200
- Canon SX420 vs Sony A7R III
- Panasonic GX8 vs Sony A900
- Panasonic S1 vs Sony A900
- Sony A900 vs Sony NEX-3N
Specifications: Canon SX420 vs Sony A900
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 A900|
|Camera Type||Fixed lens compact camera||Digital single lens reflex|
|Camera Lens||24-1008mm f/3.5-6.6||Sony A mount lenses|
|Launch Date||January 2016||September 2008|
|Launch Price||USD 299||USD 2,999|
|Sensor Specs||Canon SX420||Sony A900|
|Sensor Format||1/2.3" Sensor||Full Frame Sensor|
|Sensor Size||6.17 x 4.55 mm||35.9 x 24.0 mm|
|Sensor Area||28.0735 mm2||861.6 mm2|
|Sensor Diagonal||7.7 mm||43.2 mm|
|Sensor Resolution||19.9 Megapixels||24.4 Megapixels|
|Image Resolution||5152 x 3864 pixels||6048 x 4032 pixels|
|Pixel Pitch||1.19 μm||5.94 μm|
|Pixel Density||70.91 MP/cm2||2.83 MP/cm2|
|Moiré control||no AA filter||Anti-Alias filter|
|Movie Capability||720/25p Video||no Video|
|ISO Setting||100 - 1,600 ISO||200 - 3,200 ISO|
|ISO Boost||no Enhancement||100 - 6,400 ISO|
|Image Processor||DIGIC 4+||BIONZ|
|DXO Sensor Quality (score)||..||79|
|DXO Color Depth (bits)||..||23.7|
|DXO Dynamic Range (EV)||..||12.3|
|DXO Low Light (ISO)||..||1431|
|Screen Specs||Canon SX420||Sony A900|
|Viewfinder Type||no viewfinder||Optical viewfinder|
|Viewfinder Field of View||100%|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||230k dots||922k dots|
|LCD Attachment||Fixed screen||Fixed screen|
|Shooting Specs||Canon SX420||Sony A900|
|Focus System||Contrast-detect AF||Phase-detect AF|
|Continuous Shooting||0.5 shutter flaps/s||5 shutter flaps/s|
|Image Stabilization||Lens-based stabilization||In-body stabilization|
|Fill Flash||Built-in Flash||no On-Board Flash|
|Storage Medium||SDXC cards||CF or MS cards|
|Second Storage Option||Single card slot||Dual card slots|
|Connectivity Specs||Canon SX420||Sony A900|
|External Flash||no Hotshoe||Hotshoe|
|Studio Flash||no PC Sync||PC Sync socket|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||no HDMI||mini HDMI|
|Wifi Support||Wifi built-in||no Wifi|
|Near-Field Communication||NFC built-in||no NFC|
|Body Specs||Canon SX420||Sony A900|
|Environmental Sealing||not weather sealed||Weathersealed body|
|Battery Life (CIPA)||195 shots per charge||880 shots per charge|
104 x 69 x 85 mm
(4.1 x 2.7 x 3.3 in)
156 x 117 x 82 mm
(6.1 x 4.6 x 3.2 in)
|Camera Weight||325 g (11.5 oz)||895 g (31.6 oz)|
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