Olympus E-PM2 vs Sony A58
The Olympus PEN E-PM2 and the Sony Alpha SLT-A58 are two digital cameras that were announced, respectively, in September 2012 and February 2013. The E-PM2 is a mirrorless interchangeable lens camera, while the A58 is a DSLR. The cameras are based on a Four Thirds (E-PM2) and an APS-C (A58) sensor. The Olympus has a resolution of 15.9 megapixels, whereas the Sony provides 19.8 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 Olympus PEN E-PM2 and the Sony Alpha SLT-A58? 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 Olympus E-PM2 and the Sony A58. The two cameras are presented according to their relative size. Three consecutive views from the front, the top, and the rear side are shown. All width, height and depth measures are rounded to the nearest millimeter.
The E-PM2 can be obtained in four different colors (black, silver, red, white), while the A58 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 A58 is considerably larger (74 percent) than the Olympus E-PM2. Moreover, the A58 is substantially heavier (83 percent) than the E-PM2. In this context, it is worth noting that neither the E-PM2 nor the A58 are weather-sealed.
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. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.
The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. 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.||Olympus E-PM2||110 mm||64 mm||34 mm||269 g||360||n||Sep 2012||499|
|2.||Sony A58||129 mm||95 mm||78 mm||492 g||690||n||Feb 2013||599|
|3.||Nikon D3200||125 mm||96 mm||77 mm||505 g||540||n||Apr 2012||599|
|4.||Olympus E-PL9||117 mm||68 mm||39 mm||380 g||350||n||Feb 2018||599|
|5.||Olympus E-PL8||115 mm||67 mm||38 mm||357 g||350||n||Sep 2016||549|
|6.||Olympus E-M10 II||120 mm||83 mm||47 mm||390 g||320||n||Aug 2015||649|
|7.||Olympus E-PL7||115 mm||67 mm||38 mm||357 g||350||n||Aug 2014||599|
|8.||Olympus E-P5||122 mm||69 mm||37 mm||420 g||330||n||May 2013||999|
|9.||Olympus E-PL6||111 mm||64 mm||38 mm||325 g||360||n||May 2013||599|
|10.||Olympus E-PL5||111 mm||64 mm||38 mm||325 g||360||n||Sep 2012||599|
|11.||Olympus E-PL3||110 mm||64 mm||37 mm||313 g||300||n||Jun 2011||599|
|12.||Olympus E-PM1||110 mm||64 mm||34 mm||265 g||330||n||Jun 2011||499|
|13.||Panasonic GX850||107 mm||65 mm||33 mm||269 g||210||n||Jan 2017||549|
|14.||Sony A68||143 mm||104 mm||81 mm||610 g||540||n||Nov 2015||699|
|15.||Sony A5100||110 mm||63 mm||36 mm||283 g||400||n||Aug 2014||549|
|16.||Sony A6000||120 mm||67 mm||45 mm||344 g||360||n||Feb 2014||599|
|17.||Sony A3000||128 mm||91 mm||85 mm||411 g||470||n||Aug 2013||329|
|Notes: 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 E-PM2 was launched at a somewhat lower price (by 17 percent) than the A58, which makes it more attractive for photographers on a tight budget. 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 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. 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 tend to be associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Olympus E-PM2 features a Four Thirds sensor and the Sony A58 an APS-C sensor. The sensor area in the A58 is 63 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.5. The sensor in the E-PM2 has a native 4:3 aspect ratio, while the one in the A58 offers a 3:2 aspect.
With 19.8MP, the A58 offers a higher resolution than the E-PM2 (15.9MP), but the A58 nevertheless has larger individual pixels (pixel pitch of 4.31μm versus 3.76μm for the E-PM2) due to its larger sensor. Moreover, the A58 is a somewhat more recent model (by 5 months) than the E-PM2, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.
The resolution advantage of the Sony A58 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A58 for good quality output (200 dots per inch) amounts to 27.3 x 18.2 inches or 69.3 x 46.1 cm, for very good quality (250 dpi) 21.8 x 14.5 inches or 55.4 x 36.9 cm, and for excellent quality (300 dpi) 18.2 x 12.1 inches or 46.2 x 30.8 cm. The corresponding values for the Olympus E-PM2 are 23 x 17.3 inches or 58.5 x 43.9 cm for good quality, 18.4 x 13.8 inches or 46.8 x 35.1 cm for very good quality, and 15.4 x 11.5 inches or 39 x 29.3 cm for excellent quality prints.
The Olympus PEN E-PM2 has a native sensitivity range from ISO 100 to ISO 25600. The corresponding ISO settings for the Sony Alpha SLT-A58 are ISO 100 to ISO 16000, with the possibility to increase the ISO range to 100-25600.
Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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. The Overall DXO ratings for the two cameras under consideration are close, suggesting that they provide similar imaging performance. The following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|1.||Olympus E-PM2||Four Thirds||15.9||4608||3456||1080/30p||22.7||12.2||932||72|
|4.||Olympus E-PL9||Four Thirds||15.9||4608||3456||4K/30p||..||..||..||..|
|5.||Olympus E-PL8||Four Thirds||15.9||4608||3456||1080/30p||..||..||..||..|
|6.||Olympus E-M10 II||Four Thirds||15.9||4608||3456||1080/60p||23.1||12.5||842||73|
|7.||Olympus E-PL7||Four Thirds||15.9||4608||3456||1080/30p||22.7||12.4||873||72|
|8.||Olympus E-P5||Four Thirds||15.9||4608||3456||1080/30p||22.8||12.4||895||72|
|9.||Olympus E-PL6||Four Thirds||15.9||4608||3456||1080/30p||..||..||..||..|
|10.||Olympus E-PL5||Four Thirds||15.9||4608||3456||1080/30p||22.8||12.3||889||72|
|11.||Olympus E-PL3||Four Thirds||12.2||4032||3024||1080/60i||20.9||10.3||499||52|
|12.||Olympus E-PM1||Four Thirds||12.2||4032||3024||1080/60i||21.0||10.3||499||52|
|13.||Panasonic GX850||Four Thirds||15.8||4592||3448||4K/30p||23.2||13.3||586||73|
Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the A58 provides a faster frame rate than the E-PM2. It can shoot movie footage at 1080/60i, while the Olympus is limited to 1080/30p.
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 E-PM2 relies on live view and the rear LCD for framing. That said, the E-PM2 can be equipped with an optional viewfinder – the VF-4. The table below summarizes some of the other core capabilities of the Olympus E-PM2 and Sony A58 in connection with corresponding information for a sample of similar cameras.
|1.||Olympus E-PM2||optional||n||3.0 / 460||fixed||Y||1/4000s||8.0||n||Y|
|2.||Sony A58||1440||n||2.7 / 460||tilting||n||1/4000s||5.0||Y||Y|
|3.||Nikon D3200||optical||n||3.0 / 921||fixed||n||1/4000s||4.0||Y||n|
|4.||Olympus E-PL9||none||n||3.0 / 1040||tilting||Y||1/4000s||8.6||Y||Y|
|5.||Olympus E-PL8||optional||n||3.0 / 1037||tilting||Y||1/4000s||8.0||n||Y|
|6.||Olympus E-M10 II||2360||n||3.0 / 1040||tilting||Y||1/4000s||8.0||Y||Y|
|7.||Olympus E-PL7||optional||n||3.0 / 1037||tilting||Y||1/4000s||8.0||n||Y|
|8.||Olympus E-P5||optional||n||3.0 / 1037||tilting||Y||1/8000s||9.0||Y||Y|
|9.||Olympus E-PL6||optional||n||3.0 / 460||tilting||Y||1/4000s||8.0||n||Y|
|10.||Olympus E-PL5||optional||n||3.0 / 460||tilting||Y||1/4000s||8.0||n||Y|
|11.||Olympus E-PL3||optional||n||3.0 / 460||tilting||n||1/4000s||5.5||n||Y|
|12.||Olympus E-PM1||optional||n||3.0 / 460||fixed||n||1/4000s||5.5||n||Y|
|13.||Panasonic GX850||none||n||3.0 / 1040||tilting||Y||1/500s||10.0||Y||n|
|14.||Sony A68||1440||Y||2.7 / 460||tilting||n||1/4000s||8.0||Y||Y|
|15.||Sony A5100||none||n||3.0 / 922||tilting||Y||1/4000s||6.0||Y||n|
|16.||Sony A6000||1440||n||3.0 / 922||tilting||n||1/4000s||11.0||Y||n|
|17.||Sony A3000||202||n||3.0 / 230||fixed||n||1/4000s||2.5||Y||n|
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The E-PM2 has a touchscreen, while the A58 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.
The E-PM2 writes its imaging data to SDXC cards, while the A58 uses SDXC or Memory Stick PRO Duo cards. The E-PM2 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the A58 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 Olympus PEN E-PM2 and Sony Alpha SLT-A58 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Olympus E-PM2||Y||stereo / mono||-||-||mini||2.0||-||-||-|
|2.||Sony A58||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|3.||Nikon D3200||Y||mono / mono||Y||-||mini||2.0||-||-||-|
|4.||Olympus E-PL9||Y||stereo / mono||-||-||micro||2.0||Y||-||Y|
|5.||Olympus E-PL8||Y||stereo / mono||-||-||micro||2.0||Y||-||-|
|6.||Olympus E-M10 II||Y||stereo / mono||-||-||micro||2.0||Y||-||-|
|7.||Olympus E-PL7||Y||stereo / mono||-||-||micro||2.0||Y||-||-|
|8.||Olympus E-P5||Y||stereo / mono||-||-||micro||2.0||Y||-||-|
|9.||Olympus E-PL6||Y||stereo / mono||-||-||mini||2.0||-||-||-|
|10.||Olympus E-PL5||Y||stereo / mono||-||-||mini||2.0||-||-||-|
|11.||Olympus E-PL3||Y||stereo / -||-||-||mini||2.0||-||-||-|
|12.||Olympus E-PM1||Y||stereo / mono||-||-||mini||2.0||-||-||-|
|13.||Panasonic GX850||-||stereo / mono||-||-||micro||2.0||Y||-||-|
|14.||Sony A68||Y||stereo / mono||Y||-||micro||2.0||-||-||-|
|15.||Sony A5100||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|16.||Sony A6000||Y||stereo / mono||-||-||micro||2.0||Y||Y||-|
|17.||Sony A3000||Y||stereo / mono||-||-||mini||2.0||-||-||-|
It is notable that the A58 has a microphone port, which can help to improve the quality of audio recordings by attaching an external microphone. The E-PM2 does not feature such a mic input.
Both the E-PM2 and the A58 have been discontinued, but can regularly be found used on eBay. The A58 was replaced by the Sony A68, while the E-PM2 does not have a direct successor. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Olympus and Sony websites.
So what is the bottom line? Which of the two cameras – the Olympus E-PM2 or the Sony A58 – 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.
Advantages of the Olympus PEN E-PM2:
- Larger screen: Has a bigger rear LCD (3.0" vs 2.7") for image review and settings control.
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- Faster burst: Shoots at higher frequency (8 vs 5 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (110x64mm vs 129x95mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 223g or 45 percent) and hence easier to carry around.
- More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More affordable: Was introduced into a lower priced segment (17 percent cheaper at launch).
- More heavily discounted: Has been on the market for longer (launched in September 2012).
Reasons to prefer the Sony Alpha SLT-A58:
- More detail: Has more megapixels (19.8 vs 15.9MP), which boosts linear resolution by 14%.
- Better video: Provides higher movie framerates (1080/60i versus 1080/30p).
- 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.
- Longer lasting: Gets more shots (690 versus 360) out of a single battery charge.
- Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
- More modern: Was introduced somewhat (5 months) more recently.
If the count of relative strengths (bullet points above) is taken as a measure, the E-PM2 comes out slightly ahead of the A58 (9 : 8 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 Olympus E-PM2 and the Sony A58 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best DSLR Camera listings 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 E-PM2 or the A58 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 expert reviews 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.||Olympus E-PM2||3/5||..||..||77/100||5/5||4.5/5||Sep 2012||499|
|2.||Sony A58||3/5||..||..||..||4.5/5||4.5/5||Feb 2013||599|
|3.||Nikon D3200||5/5||+ +||..||73/100||4.5/5||4.5/5||Apr 2012||599|
|4.||Olympus E-PL9||..||+||..||..||4.5/5||4/5||Feb 2018||599|
|5.||Olympus E-PL8||..||..||..||..||4.5/5||4/5||Sep 2016||549|
|6.||Olympus E-M10 II||4.5/5||+ +||..||80/100||5/5||5/5||Aug 2015||649|
|7.||Olympus E-PL7||4/5||+||..||..||5/5||4/5||Aug 2014||599|
|8.||Olympus E-P5||5/5||+ +||..||78/100||4.5/5||5/5||May 2013||999|
|9.||Olympus E-PL6||..||..||..||..||..||..||May 2013||599|
|10.||Olympus E-PL5||3/5||+ +||..||..||4.5/5||4.5/5||Sep 2012||599|
|11.||Olympus E-PL3||3/5||+ +||..||72/100||4.5/5||4/5||Jun 2011||599|
|12.||Olympus E-PM1||..||86/100||..||71/100||4.5/5||4.5/5||Jun 2011||499|
|13.||Panasonic GX850||..||+||..||76/100||4.5/5||4.5/5||Jan 2017||549|
|14.||Sony A68||3/5||..||..||..||4/5||4/5||Nov 2015||699|
|15.||Sony A5100||4.5/5||+||..||..||4.5/5||5/5||Aug 2014||549|
|16.||Sony A6000||5/5||+||4.5/5||80/100||4.5/5||5/5||Feb 2014||599|
|17.||Sony A3000||3/5||+||..||..||4/5||4/5||Aug 2013||329|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
Care should be taken when interpreting the review scores above, 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, 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? 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 70D vs Olympus E-PM2
- Canon SX70 vs Olympus E-PM2
- Fujifilm X-T200 vs Sony A58
- Nikon D2Xs vs Olympus E-PM2
- Nikon D500 vs Olympus E-PM2
- Nikon D600 vs Olympus E-PM2
- Nikon Z7 vs Sony A58
- Olympus E-PM2 vs Panasonic G6
- Panasonic FZ1000 II vs Sony A58
- Pentax K-S1 vs Sony A58
- Sony A58 vs Sony NEX-3
- Sony A58 vs Sony RX100
Specifications: Olympus E-PM2 vs Sony A58
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||Olympus E-PM2||Sony A58|
|Camera Type||Mirrorless system camera||Digital single lens reflex|
|Camera Lens||Micro Four Thirds lenses||Sony A mount lenses|
|Launch Date||September 2012||February 2013|
|Launch Price||USD 499||USD 599|
|Sensor Specs||Olympus E-PM2||Sony A58|
|Sensor Format||Four Thirds Sensor||APS-C Sensor|
|Sensor Size||17.3 x 13.0 mm||23.5 x 15.6 mm|
|Sensor Area||224.9 mm2||366.6 mm2|
|Sensor Diagonal||21.6 mm||28.2 mm|
|Sensor Resolution||15.9 Megapixels||19.8 Megapixels|
|Image Resolution||4608 x 3456 pixels||5456 x 3632 pixels|
|Pixel Pitch||3.76 μm||4.31 μm|
|Pixel Density||7.08 MP/cm2||5.41 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||1080/30p Video||1080/60i Video|
|ISO Setting||100 - 25,600 ISO||100 - 16,000 ISO|
|ISO Boost||no Enhancement||100 - 25,600 ISO|
|Image Processor||TruePic VI||BIONZ|
|DXO Sensor Quality (score)||72||74|
|DXO Color Depth (bits)||22.7||23.3|
|DXO Dynamic Range (EV)||12.2||12.5|
|DXO Low Light (ISO)||932||753|
|Screen Specs||Olympus E-PM2||Sony A58|
|Viewfinder Type||Viewfinder optional||Electronic viewfinder|
|Viewfinder Field of View||100%|
|Viewfinder Resolution||1440k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||2.7inch|
|LCD Resolution||460k dots||460k dots|
|LCD Attachment||Fixed screen||Tilting screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Olympus E-PM2||Sony A58|
|Focus System||Contrast-detect AF||Phase-detect AF|
|Manual Focusing Aid||no Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/4000s|
|Continuous Shooting||8 shutter flaps/s||5 shutter flaps/s|
|Image Stabilization||In-body stabilization||In-body stabilization|
|Fill Flash||no On-Board Flash||Built-in Flash|
|Storage Medium||SDXC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-I||no|
|Connectivity Specs||Olympus E-PM2||Sony A58|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Wifi Support||no Wifi||no Wifi|
|Body Specs||Olympus E-PM2||Sony A58|
|Battery Life (CIPA)||360 shots per charge||690 shots per charge|
110 x 64 x 34 mm
(4.3 x 2.5 x 1.3 in)
129 x 95 x 78 mm
(5.1 x 3.7 x 3.1 in)
|Camera Weight||269 g (9.5 oz)||492 g (17.4 oz)|
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