Sony A58 vs RX100
The Sony Alpha SLT-A58 and the Sony Cyber-shot DSC-RX100 are two digital cameras that were revealed to the public, respectively, in February 2013 and June 2012. The A58 is a DSLR, while the RX100 is a fixed lens compact. The cameras are based on an APS-C (A58) and an one-inch (RX100) sensor. The A58 has a resolution of 19.8 megapixels, whereas the RX100 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 Sony Alpha SLT-A58 and the Sony Cyber-shot DSC-RX100? 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 Sony A58 and the Sony RX100. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All width, height and depth dimensions are rounded to the nearest millimeter.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony RX100 is considerably smaller (52 percent) than the Sony A58. In this context, it is worth noting that neither the A58 nor the RX100 are weather-sealed.
The above size and weight comparisons are to some extent incomplete and possibly misleading, as the RX100 has a lens built in, whereas the A58 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.
Concerning battery life, the A58 gets 690 shots out of its NP-FM500H battery, while the RX100 can take 330 images on a single charge of its NP-BX1 power pack. The power pack in the RX100 can be charged via the USB port, 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, you can use the CAM-parator app to select your camera combination among a large number of options.
|Sony A58||5.1 in||3.7 in||3.1 in||17.4 oz||690||n||Feb 2013||599|
|Sony RX100||4.0 in||2.3 in||1.4 in||8.5 oz||330||n||Jun 2012||649|
|Canon G9 X Mark II||3.9 in||2.3 in||1.2 in||7.3 oz||235||n||Jan 2017||529|
|Canon G9 X||3.9 in||2.3 in||1.2 in||7.4 oz||220||n||Oct 2015||529|
|Canon SL1||4.6 in||3.6 in||2.7 in||14.4 oz||380||n||Mar 2013||549|
|Canon T5i||5.2 in||3.9 in||3.1 in||20.5 oz||440||n||Mar 2013||649|
|Nikon D5600||4.9 in||3.8 in||2.8 in||16.4 oz||970||n||Nov 2016||699|
|Nikon D3300||4.9 in||3.9 in||3.0 in||15.2 oz||700||n||Jan 2014||499|
|Nikon D3200||4.9 in||3.8 in||3.0 in||17.8 oz||540||n||Apr 2012||599|
|Sony A68||5.6 in||4.1 in||3.2 in||21.5 oz||540||n||Nov 2015||699|
|Sony A7 II||5.0 in||3.8 in||2.4 in||21.1 oz||350||Y||Nov 2014||1,999|
|Sony A5100||4.3 in||2.5 in||1.4 in||10.0 oz||400||n||Aug 2014||549|
|Sony A6000||4.7 in||2.6 in||1.8 in||12.1 oz||360||n||Feb 2014||599|
|Sony RX100 III||4.0 in||2.3 in||1.6 in||10.2 oz||320||n||May 2014||799|
|Sony A3000||5.0 in||3.6 in||3.3 in||14.5 oz||470||n||Aug 2013||329|
|Sony RX10||5.1 in||3.5 in||4.0 in||28.7 oz||420||Y||Oct 2013||1,299|
|Sony RX100 II||4.0 in||2.3 in||1.5 in||9.9 oz||350||n||Jun 2013||749|
|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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. 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 imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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. 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 A58 features an APS-C sensor and the Sony RX100 an one-inch sensor. The sensor area in the RX100 is 68 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 2.7. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Despite having a smaller sensor, the RX100 offers a slightly higher resolution of 20 megapixels, compared with 19.8 MP of the A58. 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 2.41μm versus 4.31μm for the A58). Moreover, it should be noted that the A58 is a somewhat more recent model (by 8 months) than the RX100, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels.
The Sony Alpha SLT-A58 has a native sensitivity range from ISO 100 to ISO 16000, which can be extended to ISO 100-25600. The corresponding ISO settings for the Sony Cyber-shot DSC-RX100 are ISO 100 to ISO 6400, with the possibility to increase the ISO range to 100-25600.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. Of the two cameras under review, the A58 has a notably higher overall DXO score than the RX100 (overall score 8 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.7 bits higher color depth, 0.1 EV in additional dynamic range, and 0.9 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.
| DXO |
|Canon G9 X Mark II||1-inch||20.0||5472||3648||1080/60p||21.9||12.5||522||65|
|Canon G9 X||1-inch||20.0||5472||3648||1080/60p||21.5||12.3||495||63|
|Sony A7 II||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|Sony RX100 III||1-inch||20.0||5472||3648||1080/60p||22.4||12.3||495||67|
|Sony RX100 II||1-inch||20.0||5472||3648||1080/60p||22.5||12.4||483||67|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the RX100 provides a faster frame rate than the A58. It can shoot movie footage at 1080/60p, while the A58 is limited to 1080/60i.
Apart from body and sensor, cameras can and do differ across a range of features. For example, the A58 has an electronic viewfinder (1440k dots), which can be very helpful when shooting in bright sunlight. In contrast, the RX100 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 A58, the Sony RX100, and comparable cameras.
|Canon G9 X Mark II||none||n||3.0||1040||fixed||Y||1/2000s||8.2||Y||Y|
|Canon G9 X||none||n||3.0||1040||fixed||Y||1/2000s||6.0||Y||Y|
|Sony A7 II||2400||n||3.0||1230||tilting||n||1/8000s||5.0||n||Y|
|Sony RX100 III||1440||n||3.0||1229||tilting||n||1/2000s||10.0||Y||Y|
|Sony RX100 II||optional||n||3.0||1229||tilting||n||1/2000s||10.0||Y||Y|
Concerning the storage of imaging data, both the A58 and the RX100 write their files to SDXC or Memory Stick PRO Duo 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 SLT-A58 and Sony Cyber-shot DSC-RX100 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
|Canon G9 X Mark II||-||stereo||mono||-||-||micro||2.0||Y||Y||Y|
|Canon G9 X||-||stereo||mono||-||-||micro||2.0||Y||Y||-|
|Sony A7 II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-|
|Sony RX100 III||-||stereo||mono||-||-||micro||2.0||Y||Y||-|
|Sony RX100 II||Y||stereo||mono||-||-||micro||2.0||Y||Y||-|
It is notable that the A58 has a hotshoe, while the RX100 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.
Both the A58 and the RX100 have been discontinued, but can regularly be found used on eBay. The RX100 was replaced by the Sony RX100 II, while the A58 was followed by the Sony A68. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Sony website.
So what is the bottom line? Is there a clear favorite between the Sony A58 and the Sony RX100? Which camera is better? The listing below highlights the relative strengths of the two models.
Arguments in favor of the Sony Alpha SLT-A58:
- Better image quality: Scores markedly higher (8 points) in the DXO overall assessment.
- Better low-light sensitivity: Requires less light for good images (0.9 stops ISO advantage).
- Better sound: Can connect to an external microphone for higher quality sound recording.
- Easier framing: Has an electronic viewfinder for image composition and settings control.
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Faster shutter: Has higher mechanical shutter speed (1/4000s vs 1/2000s) to freeze action.
- More flexible: Can take a variety of interchangeable lenses, including specialty optics.
- Longer lasting: Can take more shots (690 versus 330) on a single battery charge.
- Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
- More modern: Is somewhat more recent (announced 8 months after the RX100).
Reasons to prefer the Sony Cyber-shot DSC-RX100:
- Better video: Provides higher movie framerates (1080/60p versus 1080/60i).
- Larger screen: Has a bigger rear LCD (3.0" vs 2.7") for image review and settings control.
- More detailed LCD: Has a higher resolution rear screen (1229k vs 460k dots).
- Faster burst: Shoots at higher frequency (10 vs 5 flaps/sec) to capture the decisive moment.
- Ready to shoot: Comes with an integrated lens, while the A58 requires a separate lens.
- More compact: Is smaller (102x58mm vs 129x95mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight even though it has a lens built in (unlike the A58).
- Easier travel charging: Can be conveniently charged via its USB port.
- More heavily discounted: Has been on the market for longer (launched in June 2012).
If the count of individual advantages (bullet points above) is taken as a guide, the A58 comes out slightly ahead of the RX100 (10 : 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 A58 and the Sony RX100 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Travel-Zoom 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 incomplete and does no justice, for example, to the way the A58 or the RX100 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 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 A58||..||..||4.5/5||4.5/5||4.5/5||Feb 2013||599|
|Sony RX100||+ +||78/100||4/5||5/5||5/5||Jun 2012||649|
|Canon G9 X Mark II||..||75/100||4.5/5||4.5/5||4.5/5||Jan 2017||529|
|Canon G9 X||+ +||..||4.5/5||4/5||4.5/5||Oct 2015||529|
|Canon SL1||+||78/100||4/5||4/5||4/5||Mar 2013||549|
|Canon T5i||..||76/100||4.5/5||4.5/5||4.5/5||Mar 2013||649|
|Nikon D5600||..||79/100||4.5/5||4.5/5||4/5||Nov 2016||699|
|Nikon D3300||+||77/100||4.5/5||4.5/5||4.5/5||Jan 2014||499|
|Nikon D3200||+ +||73/100||4.5/5||4.5/5||4.5/5||Apr 2012||599|
|Sony A68||..||..||4/5||..||4/5||Nov 2015||699|
|Sony A7 II||+||82/100||4.5/5||5/5||5/5||Nov 2014||1,999|
|Sony A5100||+||..||4.5/5||4.5/5||5/5||Aug 2014||549|
|Sony A6000||+||80/100||4.5/5||5/5||5/5||Feb 2014||599|
|Sony RX100 III||+ +||82/100||4.5/5||4.5/5||5/5||May 2014||799|
|Sony A3000||+||..||4/5||4.5/5||4/5||Aug 2013||329|
|Sony RX10||+||80/100||4.5/5||4.5/5||4.5/5||Oct 2013||1,299|
|Sony RX100 II||+ +||79/100||4.5/5||5/5||4.5/5||Jun 2013||749|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, 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 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 are interested in seeing how other cameras pair up, just make a corresponding selection in the search boxes below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
Specifications: Sony A58 vs Sony RX100
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 A58||Sony RX100|
|Camera Type||Digital single lens reflex||Fixed lens compact camera|
|Camera Lens||Sony A mount lenses||28-100mm f/1.8-4.9|
|Launch Date||February 2013||June 2012|
|Launch Price||USD 599||USD 649|
|Sensor Specs||Sony A58||Sony RX100|
|Sensor Format||APS-C Sensor||1" Sensor|
|Sensor Size||23.5 x 15.6 mm||13.2 x 8.8 mm|
|Sensor Area||366.6 mm2||116.16 mm2|
|Sensor Diagonal||28.2 mm||15.9 mm|
|Sensor Resolution||19.8 Megapixels||20 Megapixels|
|Image Resolution||5456 x 3632 pixels||5472 x 3648 pixels|
|Pixel Pitch||4.31 μm||2.41 μm|
|Pixel Density||5.41 MP/cm2||17.18 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/60i Video||1080/60p Video|
|ISO Setting||100 - 16,000 ISO||100 - 6,400 ISO|
|ISO Boost||100 - 25,600 ISO||100 - 25,600 ISO|
|Image Processor||BIONZ||BIONZ X|
|DXO Sensor Quality (score)||74||66|
|DXO Color Depth (bits)||23.3||22.6|
|DXO Dynamic Range (EV)||12.5||12.4|
|DXO Low Light (ISO)||753||390|
|Screen Specs||Sony A58||Sony RX100|
|Viewfinder Type||Electronic viewfinder||no viewfinder|
|Viewfinder Field of View||100%|
|Viewfinder Resolution||1440k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||2.7inch||3.0inch|
|LCD Resolution||460k dots||1229k dots|
|LCD Attachment||Tilting screen||Fixed screen|
|Shooting Specs||Sony A58||Sony RX100|
|Focus System||Phase-detect AF||Contrast-detect AF|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/2000s|
|Continuous Shooting||5 shutter flaps/s||10 shutter flaps/s|
|Image Stabilization||In-body stabilization||Lens-based stabilization|
|Fill Flash||Build-in Flash||Build-in Flash|
|Storage Medium||MS or SDXC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||no||no|
|Connectivity Specs||Sony A58||Sony RX100|
|External Flash||Hotshoe||no Hotshoe|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||micro HDMI|
|Microphone Port||External MIC port||no MIC socket|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Sony A58||Sony RX100|
|Battery Life (CIPA)||690 shots per charge||330 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
129 x 95 x 78 mm
(5.1 x 3.7 x 3.1 in)
102 x 58 x 36 mm
(4.0 x 2.3 x 1.4 in)
|Camera Weight||492 g (17.4 oz)||240 g (8.5 oz)|
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