Panasonic G9 versus Sony A99 II
The Panasonic Lumix DC-G9 and the Sony Alpha ALT-A99 II are two digital cameras that were announced, respectively, in November 2017 and September 2016. The G9 is a mirrorless interchangeable lens camera, while the A99 II is a DSLR. The cameras are based on a Four Thirds (G9) and a full frame (A99 II) sensor. The Panasonic has a resolution of 20.2 megapixel, whereas the Sony provides 42.2 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.
Body comparison: Panasonic G9 vs Sony A99 II
The physical size and weight of the Panasonic G9 and the Sony A99 II are illustrated in the side-by-side display below. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter. You can also toggle the display to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left – the G9 – represents 100 percent across all the size and weight measures).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A99 II is notably larger (12 percent) than the Panasonic G9. Moreover, the A99 II is markedly heavier (29 percent) than the G9. In this context, it is worth noting that both cameras are splash and dust-proof and can, hence, be used in inclement weather conditions or harsh environments.
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 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 want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
|Camera Body Specifications|
|Panasonic G9»||5.4 in||3.8 in||3.6 in||23.2 oz||400||Y||Nov 2017||1,699|
|Sony A99 II«||5.6 in||4.1 in||3.0 in||29.9 oz||490||Y||Sep 2016||3,199|
|Fujifilm X-H1« »||5.5 in||3.8 in||3.4 in||23.7 oz||310||Y||Feb 2018||1,899|
|Olympus E-M1 II« »||5.3 in||3.6 in||2.6 in||20.2 oz||440||Y||Sep 2016||1,999|
|Panasonic GH5s« »||5.5 in||3.9 in||3.4 in||23.3 oz||440||Y||Jan 2018||2,499|
|Panasonic GH5« »||5.5 in||3.9 in||3.4 in||25.6 oz||410||Y||Jan 2017||1,999|
|Panasonic G85« »||5.0 in||3.5 in||2.9 in||17.8 oz||330||Y||Sep 2016||899|
|Panasonic GX8« »||5.2 in||3.1 in||2.5 in||17.2 oz||330||Y||Jul 2015||1,199||-|
|Panasonic GH4« »||5.2 in||3.7 in||3.3 in||19.8 oz||500||Y||Feb 2014||1,499||-|
|Pentax K-1« »||5.4 in||4.3 in||3.4 in||35.6 oz||760||Y||Feb 2016||1,799||-|
|Sony A7 III« »||5.0 in||3.8 in||2.9 in||22.9 oz||610||Y||Feb 2018||1,999|
|Sony A9« »||5.0 in||3.8 in||2.5 in||23.7 oz||650||Y||Apr 2017||4,499|
|Sony A7R III« »||5.0 in||3.8 in||2.9 in||22.9 oz||650||Y||Oct 2017||3,199|
|Sony A7R II« »||5.0 in||3.8 in||2.4 in||22.0 oz||290||Y||Jun 2015||3,199||-|
|Sony A7S II« »||5.0 in||3.8 in||2.4 in||22.1 oz||370||Y||Sep 2015||2,999|
|Sony A7 II« »||5.0 in||3.8 in||2.4 in||21.1 oz||350||Y||Nov 2014||1,999||-|
|Sony A99« »||5.8 in||4.4 in||3.1 in||28.6 oz||500||Y||Sep 2012||2,799||-|
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. The G9 was launched at a markedly lower price (by 47 percent) than the A99 II, which puts it into a different market segment. 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.
Sensor comparison: Panasonic G9 vs Sony A99 II
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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Panasonic G9 features a Four Thirds sensor and the Sony A99 II a full frame sensor. The sensor area in the A99 II is 283 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 2.0 and 1.0. The sensor in the G9 has a native 4:3 aspect ratio, while the one in the A99 II offers a 3:2 aspect.
With 42.2MP, the A99 II offers a higher resolution than the G9 (20.2MP), but the A99 II nevertheless has larger individual pixels (pixel pitch of 4.52μm versus 3.34μm for the G9) due to its larger sensor. However, the G9 is a somewhat more recent model (by 1 year and 1 month) than the A99 II, and its sensor might 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 neither of the two cameras has an anti-alias filter installed, so they are able to capture all the detail the sensor resolves.
Unlike the A99 II, the G9 has the capacity to capture high quality composite images (80.6MP) by combining multiple shots after shifting its sensor by miniscule distances. This multi-shot, pixel-shift mode is most suitable for photography of stationary objects (landscapes, studio scenes).
For most cameras, data on sensor performance has been reported by DXO Mark. 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.
|Panasonic G9»||Four Thirds||20.2||5184||3888||4K/60p||-||-||-||-|
|Sony A99 II«||Full Frame||42.2||7952||5304||4K/30p||25.4||13.4||2317||92|
|Fujifilm X-H1« »||APS-C||24.0||6000||4000||4K/30p||-||-||-||-|
|Olympus E-M1 II« »||Four Thirds||20.2||5184||3888||4K/30p||23.7||12.8||1312||80|
|Panasonic GH5s« »||Four Thirds||9.9||3680||2700||4K/60p||-||-||-||-|
|Panasonic GH5« »||Four Thirds||20.2||5184||3888||4K/60p||23.9||13.0||807||77|
|Panasonic G85« »||Four Thirds||15.8||4592||3448||4K/30p||22.8||12.5||656||71|
|Panasonic GX8« »||Four Thirds||20.2||5184||3888||4K/30p||23.5||12.6||806||75|
|Panasonic GH4« »||Four Thirds||15.9||4608||3456||4K/30p||23.2||12.8||791||74|
|Pentax K-1« »||Full Frame||36.2||7360||4912||1080/60i||25.4||14.6||3280||96|
|Sony A7 III« »||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3730||96|
|Sony A9« »||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92|
|Sony A7R III« »||Full Frame||42.2||7952||5304||4K/30p||26.0||14.7||3523||100|
|Sony A7R II« »||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
|Sony A7S II« »||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85|
|Sony A7 II« »||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|Sony A99« »||Full Frame||24.0||6000||4000||1080/60p||25.0||14.0||1555||89|
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 G9 provides a higher frame rate than the A99 II. It can shoot video footage at 4K/60p, while the Sony is limited to 4K/30p.
Feature comparison: Panasonic G9 vs Sony A99 II
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 G9 offers a substantially higher resolution than the one in the A99 II (3680k vs 2400k dots). The table below summarizes some of the other core capabilities of the Panasonic G9 and Sony A99 II in connection with corresponding information for a sample of similar cameras. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.
|Sony A99 II«||2400||Y||3.0||1229||full-flex||n||8000||12.0||n||Y|
|Fujifilm X-H1« »||3690||Y||3.0||1040||full-flex||Y||8000||14.0||n||Y|
|Olympus E-M1 II« »||2360||n||3.0||1037||swivel||Y||8000||18.0||n||Y|
|Panasonic GH5s« »||3680||n||3.2||1620||swivel||Y||8000||12.0||n||n|
|Panasonic GH5« »||3680||n||3.2||1620||swivel||Y||8000||12.0||n||Y|
|Panasonic G85« »||2360||n||3.0||1040||swivel||Y||4000||9.0||Y||Y|
|Panasonic GX8« »||2360||n||3.0||1040||swivel||Y||8000||10.0||n||Y|
|Panasonic GH4« »||2359||n||3.0||1036||swivel||Y||8000||12.0||Y||n|
|Pentax K-1« »||optical||Y||3.2||1037||full-flex||n||8000||4.4||n||Y|
|Sony A7 III« »||2359||n||3.0||922||tilting||Y||8000||10.0||n||Y|
|Sony A9« »||3686||n||3.0||1440||tilting||Y||8000||20.0||n||Y|
|Sony A7R III« »||3686||n||3.0||1440||tilting||Y||8000||10.0||n||Y|
|Sony A7R II« »||2400||n||3.0||1229||tilting||n||8000||5.0||n||Y|
|Sony A7S II« »||2400||n||3.0||1229||tilting||n||8000||5.0||n||Y|
|Sony A7 II« »||2400||n||3.0||1230||tilting||n||8000||5.0||n||Y|
|Sony A99« »||2359||Y||3.0||1229||full-flex||n||8000||6.0||n||Y|
Both the G9 and the A99 II are current models that good online retailers will have in stock. You can check the latest prices, for example, at amazon. The G9 replaced the earlier Panasonic G85, while the A99 II does not have a direct predecessor.
Review summary: Panasonic G9 vs Sony A99 II
So what conclusions can be drawn? Which of the two cameras – the Panasonic G9 or the Sony A99 II – has the upper hand? A synthesis of the relative strong points of each of the models is listed below.
Advantages of the Panasonic Lumix DC-G9:
- High quality composites: Can combine several shots after pixel-shifting its sensor.
- Better video: Provides higher movie framerates (4K/60p versus 4K/30p).
- More detailed viewfinder: Has higher resolution electronic viewfinder (3680k vs 2400k dots).
- Fewer buttons to press: Is equipped with a touch-sensitive rear screen to facilitate handling.
- Faster burst: Shoots at higher frequency (20 vs 12 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (137x97mm vs 143x104mm) and thus needs less room in the bag.
- Less heavy: Is lighter (by 191g or 22 percent) and hence easier to carry around.
- More legacy lens friendly: Can take a broad range of non-native lenses via adapters.
- More affordable: Was introduced into a lower priced category (47 percent cheaper at launch).
- More modern: Is somewhat more recent (announced 1 year and 1 month after the A99 II).
Reasons to prefer the Sony Alpha ALT-A99 II:
- More detail: Has more megapixels (42.2 vs 20.2MP), which boosts linear resolution by 48%.
- Better low-light imaging: Features bigger pixels on a larger sensor for better high-ISO images.
- More detailed LCD: Has a higher resolution rear screen (1229k vs 1040k dots).
- Longer lasting: Gets more shots (490 versus 400) out of a single battery charge.
- More heavily discounted: Has been on the market for longer (launched in September 2016).
If the number of relative strengths (bullet points above) is taken as a guide, the G9 is the clear winner of the match-up (10 : 5 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.
In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the G9 and the A99 II in practical situations. 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 why expert reviews are important. The adjacent table relays the overall verdicts of several of the most popular camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, photographyblog). You can find the full text of the reviews by clicking on the site logo in the table header.
|Panasonic G9»||HiRec||85/100||5/5||-||5/5||Nov 2017||1,699|
|Sony A99 II«||-||85/100||4.5/5||4.5/5||4.5/5||Sep 2016||3,199|
|Fujifilm X-H1« »||Rec||86/100||4.5/5||-||4.5/5||Feb 2018||1,899|
|Olympus E-M1 II« »||HiRec||85/100||4.5/5||5/5||4.5/5||Sep 2016||1,999|
|Panasonic GH5s« »||-||84/100||4.5/5||-||4.5/5||Jan 2018||2,499|
|Panasonic GH5« »||HiRec||85/100||4.5/5||5/5||5/5||Jan 2017||1,999|
|Panasonic G85« »||HiRec||84/100||5/5||4.5/5||4.5/5||Sep 2016||899|
|Panasonic GX8« »||Rec||82/100||4.5/5||5/5||4.5/5||Jul 2015||1,199||-|
|Panasonic GH4« »||HiRec||85/100||5/5||5/5||5/5||Feb 2014||1,499||-|
|Pentax K-1« »||-||84/100||5/5||4.5/5||5/5||Feb 2016||1,799||-|
|Sony A7 III« »||HiRec||89/100||5/5||-||5/5||Feb 2018||1,999|
|Sony A9« »||HiRec||89/100||5/5||5/5||5/5||Apr 2017||4,499|
|Sony A7R III« »||HiRec||90/100||4.5/5||5/5||5/5||Oct 2017||3,199|
|Sony A7R II« »||HiRec||90/100||5/5||4.5/5||5/5||Jun 2015||3,199||-|
|Sony A7S II« »||Rec||-||4.5/5||5/5||5/5||Sep 2015||2,999|
|Sony A7 II« »||Rec||82/100||4.5/5||5/5||5/5||Nov 2014||1,999||-|
|Sony A99« »||-||84/100||4.5/5||rev||4.5/5||Sep 2012||2,799||-|
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. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.
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