Panasonic G7 vs Sony A58
The Panasonic Lumix DMC-G7 and the Sony Alpha SLT-A58 are two digital cameras that were officially introduced, respectively, in May 2015 and February 2013. The G7 is a mirrorless interchangeable lens camera, while the A58 is a DSLR. The cameras are based on a Four Thirds (G7) and an APS-C (A58) sensor. The Panasonic has a resolution of 15.8 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 Panasonic Lumix DMC-G7 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.
An illustration of the physical size and weight of the Panasonic G7 and the Sony A58 is provided in the side-by-side display below. 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 size dimensions are rounded to the nearest millimeter.
The G7 can be obtained in two different colors (black, silver), 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 notably larger (14 percent) than the Panasonic G7. Moreover, the A58 is markedly heavier (20 percent) than the G7. In this context, it is worth noting that neither the G7 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 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.||Panasonic G7||125 mm||86 mm||77 mm||410 g||350||n||May 2015||649|
|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-PL7||115 mm||67 mm||38 mm||357 g||350||n||Aug 2014||599|
|5.||Panasonic GF7||107 mm||65 mm||33 mm||266 g||230||n||Jan 2015||499|
|6.||Panasonic GM5||99 mm||60 mm||36 mm||211 g||220||n||Sep 2014||749|
|7.||Panasonic G6||122 mm||85 mm||71 mm||390 g||340||n||Apr 2013||599|
|8.||Panasonic GM1||99 mm||55 mm||30 mm||204 g||230||n||Oct 2013||749|
|9.||Panasonic G5||120 mm||83 mm||71 mm||396 g||320||n||Jul 2012||599|
|10.||Panasonic G3||115 mm||84 mm||47 mm||336 g||270||n||May 2011||599|
|11.||Panasonic G2||124 mm||84 mm||74 mm||428 g||360||n||Mar 2010||599|
|12.||Panasonic GH2||124 mm||90 mm||76 mm||442 g||330||n||Sep 2010||899|
|13.||Panasonic GF1||119 mm||71 mm||36 mm||385 g||380||n||Sep 2009||749|
|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 naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The A58 was somewhat cheaper (by 8 percent) than the G7 at launch, but both cameras fall into the same price category. 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 generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have 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 Panasonic G7 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 G7 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 G7 (15.8MP), but the A58 nevertheless has larger individual pixels (pixel pitch of 4.31μm versus 3.77μm for the G7) due to its larger sensor. However, the G7 is a much more recent model (by 2 years and 2 months) than the A58, and its sensor will have benefitted from technological advances during this time that 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 Panasonic G7 are 23 x 17.2 inches or 58.3 x 43.8 cm for good quality, 18.4 x 13.8 inches or 46.7 x 35 cm for very good quality, and 15.3 x 11.5 inches or 38.9 x 29.2 cm for excellent quality prints.
The Panasonic Lumix DMC-G7 has a native sensitivity range from ISO 160 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.
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 adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
| DXO |
|1.||Panasonic G7||Four Thirds||15.8||4592||3448||4K/30p||..||..||..||..|
|4.||Olympus E-PL7||Four Thirds||15.9||4608||3456||1080/30p||22.7||12.4||873||72|
|5.||Panasonic GF7||Four Thirds||15.8||4592||3448||1080/60p||..||..||..||..|
|6.||Panasonic GM5||Four Thirds||15.8||4592||3448||1080/60p||22.1||11.7||721||66|
|7.||Panasonic G6||Four Thirds||15.9||4608||3456||1080/60p||21.3||11.5||639||61|
|8.||Panasonic GM1||Four Thirds||15.8||4592||3448||1080/60i||22.3||11.7||660||66|
|9.||Panasonic G5||Four Thirds||15.9||4608||3456||1080/60p||..||..||..||..|
|10.||Panasonic G3||Four Thirds||15.8||4592||3448||1080/60i||21.0||10.6||667||56|
|11.||Panasonic G2||Four Thirds||12.0||4000||3000||720/30p||21.2||10.3||493||53|
|12.||Panasonic GH2||Four Thirds||15.9||4608||3456||1080/60i||21.2||11.3||655||60|
|13.||Panasonic GF1||Four Thirds||12.0||4000||3000||720/30p||21.2||10.3||513||54|
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 G7 provides a higher video resolution than the A58. It can shoot video footage at 4K/30p, while the Sony is limited to 1080/60i.
Beyond 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 G7 offers a substantially higher resolution than the one in the A58 (2360k vs 1440k dots). The adjacent table lists some of the other core features of the Panasonic G7 and Sony A58 along with similar information for a selection of comparators.
One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The G7 has a touchscreen, while the A58 has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.The G7 has an articulated LCD that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in snapping selfies. In contrast, the A58 does not have a selfie-screen.
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 G7 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).
The Panasonic G7 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.
The G7 writes its imaging data to SDXC cards, while the A58 uses SDXC or Memory Stick PRO Duo cards. The G7 supports UHS-II cards (Ultra High Speed data transfer of up to 312 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 Panasonic Lumix DMC-G7 and Sony Alpha SLT-A58 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
| WiFi |
| NFC |
It is notable that the G7 offers wifi support, while the A58 does not. Wifi can be a very convenient means to transfer image data to an off-camera location.
Both the G7 and the A58 have been discontinued, but can regularly be found used on eBay. The A58 was replaced by the Sony A68, while the G7 was followed by the Panasonic G85. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Panasonic and Sony websites.
So what conclusions can be drawn? Is there a clear favorite between the Panasonic G7 and the Sony A58? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.
Advantages of the Panasonic Lumix DMC-G7:
- Better video: Provides higher definition movie capture (4K/30p vs 1080/60i).
- More detailed viewfinder: Has higher resolution electronic viewfinder (2360k vs 1440k dots).
- Larger viewfinder image: Features a viewfinder with a higher magnification (0.70x vs 0.57x).
- 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 (1040k vs 460k dots).
- More flexible LCD: Has a swivel screen for odd-angle shots in portrait or landscape orientation.
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Faster burst: Shoots at higher frequency (7 vs 5 flaps/sec) to capture the decisive moment.
- Less disturbing: Has an electronic shutter option for completely silent shooting.
- Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
- More compact: Is smaller (125x86mm vs 129x95mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 82g or 17 percent) and hence easier to carry around.
- More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Faster buffer clearing: Supports Ultra High Speed (UHS-II) SDXC cards.
- More modern: Reflects 2 years and 2 months of technical progress since the A58 launch.
Arguments in favor of the Sony Alpha SLT-A58:
- More detail: Has more megapixels (19.8 vs 15.8MP), which boosts linear resolution by 14%.
- 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.
- Longer lasting: Gets more shots (690 versus 350) out of a single battery charge.
- Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
- More heavily discounted: Has been around for much longer (launched in February 2013).
If the number of relative strengths (bullet points above) is taken as a guide, the G7 is the clear winner of the match-up (17 : 8 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 Panasonic G7 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 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 G7 or the A58 perform in practice. 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 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], 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.||Panasonic G7||4/5||+ +||80/100||5/5||4.5/5||May 2015||649|
|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-PL7||4/5||+||..||5/5||4/5||Aug 2014||599|
|5.||Panasonic GF7||4/5||+||..||4.5/5||4.5/5||Jan 2015||499|
|6.||Panasonic GM5||3.5/5||+||77/100||5/5||4.5/5||Sep 2014||749|
|7.||Panasonic G6||4/5||+ +||..||5/5||4.5/5||Apr 2013||599|
|8.||Panasonic GM1||3/5||+||78/100||5/5||4.5/5||Oct 2013||749|
|9.||Panasonic G5||3/5||+ +||..||4.5/5||4.5/5||Jul 2012||599|
|10.||Panasonic G3||3/5||+ +||75/100||4.5/5||5/5||May 2011||599|
|11.||Panasonic G2||..||..||72/100||4/5||4.5/5||Mar 2010||599|
|12.||Panasonic GH2||5/5||+ +||79/100||4.5/5||5/5||Sep 2010||899|
|13.||Panasonic GF1||..||85/100||69/100||4.5/5||4.5/5||Sep 2009||749|
|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||+||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.|
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. 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, 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.
Specifications: Panasonic G7 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||Panasonic G7||Sony A58|
|Camera Type||Mirrorless system camera||Digital single lens reflex|
|Camera Lens||Micro Four Thirds lenses||Sony A mount lenses|
|Launch Date||May 2015||February 2013|
|Launch Price||USD 649||USD 599|
|Sensor Specs||Panasonic G7||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||15.8 Megapixels||19.8 Megapixels|
|Image Resolution||4592 x 3448 pixels||5456 x 3632 pixels|
|Pixel Pitch||3.77 μm||4.31 μm|
|Pixel Density||7.04 MP/cm2||5.41 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||4K/30p Video||1080/60i Video|
|ISO Setting||160 - 25,600 ISO||100 - 16,000 ISO|
|ISO Boost||no Enhancement||100 - 25,600 ISO|
|DXO Sensor Quality (score)||..||74|
|DXO Color Depth (bits)||..||23.3|
|DXO Dynamic Range (EV)||..||12.5|
|DXO Low Light (ISO)||..||753|
|Screen Specs||Panasonic G7||Sony A58|
|Viewfinder Type||Electronic viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%||100%|
|Viewfinder Resolution||2360k dots||1440k dots|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||2.7inch|
|LCD Resolution||1040k dots||460k dots|
|LCD Attachment||Swivel screen||Tilting screen|
|Touch Input||Touchscreen||no Touchscreen|
|Shooting Specs||Panasonic G7||Sony A58|
|Focus System||Contrast-detect AF||Phase-detect AF|
|Manual Focusing Aid||Focus Peaking||Focus Peaking|
|Max Shutter Speed (mechanical)||1/4000s||1/4000s|
|Continuous Shooting||7 shutter flaps/s||5 shutter flaps/s|
|Electronic Shutter||up to 1/16000s||no E-Shutter|
|Time-Lapse Photography||Intervalometer built-in||no Intervalometer|
|Image Stabilization||Lens stabilization only||In-body stabilization|
|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||UHS-II||no|
|Connectivity Specs||Panasonic G7||Sony A58|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||micro HDMI||mini HDMI|
|Microphone Port||External MIC port||External MIC port|
|Wifi Support||Wifi built-in||no Wifi|
|Body Specs||Panasonic G7||Sony A58|
|Battery Life (CIPA)||350 shots per charge||690 shots per charge|
125 x 86 x 77 mm
(4.9 x 3.4 x 3.0 in)
129 x 95 x 78 mm
(5.1 x 3.7 x 3.1 in)
|Camera Weight||410 g (14.5 oz)||492 g (17.4 oz)|
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