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Sony A99 II vs Panasonic G9

The Sony Alpha ALT-A99 II and the Panasonic Lumix DC-G9 are two digital cameras that were announced, respectively, in September 2016 and November 2017. The A99 II is a DSLR, while the G9 is a mirrorless interchangeable lens camera. The cameras are based on a full frame (A99 II) and a Four Thirds (G9) sensor. The Sony has a resolution of 42.2 megapixels, whereas the Panasonic provides 20.2 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Sony A99 II
versus
Panasonic G9
Sony A99 II   Panasonic G9
Digital single lens reflex Mirrorless system camera
Sony A mount lenses Micro Four Thirds lenses
42.2 MP – Full Frame sensor 20.2 MP – Four Thirds sensor
4K/30p Video 4K/60p Video
ISO 100-25,600 ISO 200-25,600
Electronic viewfinder (2400k dots) Electronic viewfinder (3680k dots)
3.0" LCD – 1229k dots 3.0" LCD – 1040k dots
Fully flexible screen (no touchscreen) Swivel touchscreen
12 shutter flaps per second 20 shutter flaps per second
In-body stabilizationIn-body stabilization
Weathersealed bodyWeathersealed body
490 shots per battery charge400 shots per battery charge
143 x 104 x 76 mm, 849 g 137 x 97 x 92 mm, 658 g
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Check G9 offers at
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Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha ALT-A99 II and the Panasonic Lumix DC-G9? 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.

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Body comparison

An illustration of the physical size and weight of the Sony A99 II and the Panasonic G9 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.

Size Sony A99 II vs Panasonic G9
Compare A99 II versus G9 top
Comparison A99 II or G9 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Panasonic G9 is notably smaller (11 percent) than the Sony A99 II. Moreover, the G9 is markedly lighter (22 percent) than the A99 II. 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 and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

Concerning battery life, the A99 II gets 490 shots out of its Sony NP-FM500H battery, while the G9 can take 400 images on a single charge of its Panasonic DMW-BLF19 power pack. The power pack in the G9 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. 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.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199ebay.com
2.
 
Panasonic G9 137 mm 97 mm 92 mm 658 g 400 Y Nov 2017 1,699ebay.com
3.
 
Canon 5DS R 152 mm 116 mm 76 mm 930 g 700 Y Feb 2015 3,699ebay.com
4.
 
Nikon D850 146 mm 124 mm 79 mm 1005 g 1840 Y Jul 2017 3,299 amazon.com
5.
 
Olympus E-M1 II 134 mm 91 mm 67 mm 574 g 440 Y Sep 2016 1,999ebay.com
6.
 
Panasonic G9 II 134 mm 102 mm 90 mm 658 g 390 Y Sep 2023 1,899 amazon.com
7.
 
Panasonic GH5 II 139 mm 98 mm 87 mm 727 g 400 Y May 2021 1,699 amazon.com
8.
 
Panasonic GH5 139 mm 98 mm 87 mm 725 g 410 Y Jan 2017 1,999ebay.com
9.
 
Panasonic G85 128 mm 89 mm 74 mm 505 g 330 Y Sep 2016 899ebay.com
10.
 
Pentax K-1 137 mm 110 mm 86 mm 1010 g 760 Y Feb 2016 1,799ebay.com
11.
 
Sony A7R IIIA 127 mm 96 mm 74 mm 650 g 650 Y Apr 2021 3,199 amazon.com
12.
 
Sony A7R III 127 mm 96 mm 74 mm 650 g 650 Y Oct 2017 3,199ebay.com
13.
 
Sony A7R II 127 mm 96 mm 60 mm 625 g 290 Y Jun 2015 3,199ebay.com
14.
 
Sony A7S II 127 mm 96 mm 60 mm 627 g 370 Y Sep 2015 2,999ebay.com
15.
 
Sony A99 147 mm 111 mm 78 mm 812 g 500 Y Sep 2012 2,799ebay.com
16.
 
Sony A850 156 mm 117 mm 82 mm 895 g 880 Y Aug 2009 1,999ebay.com
17.
 
Sony A900 156 mm 117 mm 82 mm 895 g 880 Y Sep 2008 2,999ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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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 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.

Sensor comparison

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Sony A99 II features a full frame sensor and the Panasonic G9 a Four Thirds sensor. The sensor area in the G9 is 74 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 2.0. The sensor in the A99 II has a native 3:2 aspect ratio, while the one in the G9 offers a 4:3 aspect.

Sony A99 II and Panasonic G9 sensor measures

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 pixels. 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.

The resolution advantage of the Sony A99 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A99 II for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inches or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inches or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inches or 67.3 x 44.9 cm. The corresponding values for the Panasonic G9 are 25.9 x 19.4 inches or 65.8 x 49.4 cm for good quality, 20.7 x 15.6 inches or 52.7 x 39.5 cm for very good quality, and 17.3 x 13 inches or 43.9 x 32.9 cm for excellent quality prints.

The A99 II has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

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).

The Sony Alpha ALT-A99 II has a native sensitivity range from ISO 100 to ISO 25600, which can be extended to ISO 50-25600. The corresponding ISO settings for the Panasonic Lumix DC-G9 are ISO 200 to ISO 25600, with the possibility to increase the ISO range to 100-25600.

In terms of underlying technology, the A99 II is build around a BSI-CMOS sensor, while the G9 uses a CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

A99 II versus G9 MP

For many 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
2.
 
Panasonic G9 Four Thirds 20.2 5184 38884K/60p23.112.8113874
3.
 
Canon 5DS R Full Frame 50.3 8688 57921080/30p24.612.4230886
4.
 
Nikon D850 Full Frame 45.4 8256 55044K/30p26.414.82660100
5.
 
Olympus E-M1 II Four Thirds 20.2 5184 38884K/30p23.712.8131280
6.
 
Panasonic G9 II Four Thirds 25.0 5776 43365.7K/60p23.413.5171078
7.
 
Panasonic GH5 II Four Thirds 20.2 5184 38884K/60p23.713.1113679
8.
 
Panasonic GH5 Four Thirds 20.2 5184 38884K/60p23.913.080777
9.
 
Panasonic G85 Four Thirds 15.8 4592 34484K/30p22.812.565671
10.
 
Pentax K-1 Full Frame 36.2 7360 49121080/60i25.414.6328096
11.
 
Sony A7R IIIA Full Frame 42.2 7952 53044K/30p26.014.73523100
12.
 
Sony A7R III Full Frame 42.2 7952 53044K/30p26.014.73523100
13.
 
Sony A7R II Full Frame 42.2 7952 53044K/30p26.013.9343498
14.
 
Sony A7S II Full Frame 12.0 4240 28324K/30p23.613.3299385
15.
 
Sony A99 Full Frame 24.0 6000 40001080/60p25.014.0155589
16.
 
Sony A850 Full Frame 24.4 6048 4032none23.812.2141579
17.
 
Sony A900 Full Frame 24.4 6048 4032none23.712.3143179
Note: DXO values in italics represent estimates based on sensor size and age.
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Many modern cameras cannot only take still pictures, but also record videos. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the G9 provides a faster frame rate than the A99 II. It can shoot movie footage at 4K/60p, while the Sony is limited to 4K/30p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. The two cameras under review 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 Sony A99 II and Panasonic G9 in connection with corresponding information for a sample of similar cameras.

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Core Features
# image Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Sony A99 II2400 Y3.0 / 1229 full-flex n 1/8000s 12.0/s n Y
2.
 
Panasonic G93680 Y3.0 / 1040 swivel Y 1/8000s 20.0/s n Y
3.
 
Canon 5DS Roptical Y3.2 / 1040 fixed n 1/8000s 5.0/s n n
4.
 
Nikon D850optical Y3.2 / 2359 tilting Y 1/8000s 9.0/s n n
5.
 
Olympus E-M1 II2360 n3.0 / 1037 swivel Y 1/8000s 18.0/s n Y
6.
 
Panasonic G9 II3680 n3.0 / 1840 swivel Y 1/8000s 10.0/s n Y
7.
 
Panasonic GH5 II3680 n3.0 / 1840 swivel Y 1/8000s 12.0/s n Y
8.
 
Panasonic GH53680 n3.2 / 1620 swivel Y 1/8000s 12.0/s n Y
9.
 
Panasonic G852360 n3.0 / 1040 swivel Y 1/4000s 9.0/s Y Y
10.
 
Pentax K-1optical Y3.2 / 1037 full-flex n 1/8000s 4.4/s n Y
11.
 
Sony A7R IIIA3686 n3.0 / 2340 tilting Y 1/8000s 10.0/s n Y
12.
 
Sony A7R III3686 n3.0 / 1440 tilting Y 1/8000s 10.0/s n Y
13.
 
Sony A7R II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
14.
 
Sony A7S II2400 n3.0 / 1229 tilting n 1/8000s 5.0/s n Y
15.
 
Sony A992359 Y3.0 / 1229 full-flex n 1/8000s 6.0/s n Y
16.
 
Sony A850optical Y3.0 / 922 fixed n 1/8000s 3.0/s n Y
17.
 
Sony A900optical Y3.0 / 922 fixed n 1/8000s 5.0/s n Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One differentiating feature between the two cameras concerns the touch sensitivity of the rear screen. The G9 has a touchscreen, while the A99 II has a conventional panel. Touch control can be particularly helpful, for example, for setting the focus point.

Both cameras have an articulated rear screen that can be turned to be front-facing. This feature will be particularly appreciated by vloggers and photographers who are interested in taking selfies.

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 G9 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 G9 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 A99 II writes its imaging data to SDXC or Memory Stick PRO Duo cards, while the G9 uses SDXC cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails. The G9 supports UHS-II cards (on both slots), while the A99 II can use UHS-I cards.

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Connectivity comparison

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 ALT-A99 II and Panasonic Lumix DC-G9 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Sony A99 IIYstereo / monoYYmicro2.0YYY
2.
 
Panasonic G9Ystereo / monoYYfull3.0Y-Y
3.
 
Canon 5DS RYmono / monoY-mini3.0---
4.
 
Nikon D850Ystereo / monoYYmini3.0YYY
5.
 
Olympus E-M1 IIYstereo / monoYYmicro3.0Y--
6.
 
Panasonic G9 IIYstereo / monoYYfull3.2Y-Y
7.
 
Panasonic GH5 IIYstereo / monoYYfull3.2Y-Y
8.
 
Panasonic GH5Ystereo / monoYYfull3.1Y-Y
9.
 
Panasonic G85Ystereo / monoY-micro2.0Y--
10.
 
Pentax K-1Ystereo / monoYYmicro2.0Y--
11.
 
Sony A7R IIIAYstereo / monoYYmicro3.2YYY
12.
 
Sony A7R IIIYstereo / monoYYmicro3.1YYY
13.
 
Sony A7R IIYstereo / monoYYmicro2.0YY-
14.
 
Sony A7S IIYstereo / monoYYmicro2.0YY-
15.
 
Sony A99Ystereo / monoYYmini2.0---
16.
 
Sony A850Y- / ---mini2.0---
17.
 
Sony A900Y- / ---mini2.0---
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Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

Both the A99 II and the G9 have been discontinued, but can regularly be found used on ebay. The G9 was replaced by the Panasonic G9 II, while the A99 II does not have a direct successor. Further information on the features and operation of the A99 II and G9 can be found, respectively, in the Sony A99 II Manual (free pdf) or the online Panasonic G9 Manual.

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Review summary

So what conclusions can be drawn? Is the Sony A99 II better than the Panasonic G9 or vice versa? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Sony Alpha ALT-A99 II:

  • More detail: Offers more megapixels (42.2 vs 20.2MP) with a 48% higher linear resolution.
  • 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.
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 1040k dots).
  • Longer lasting: Can take more shots (490 versus 400) on a single battery charge.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More heavily discounted: Has been on the market for longer (launched in September 2016).

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Reasons to prefer 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).
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.83x vs 0.78x).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster burst: Shoots at higher frequency (20 vs 12 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 (137x97mm vs 143x104mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 191g or 22 percent) and is thus easier to take along.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Faster data transfer: Supports a more advanced USB protocol (3.0 vs 2.0).
  • More solid recording: Has a full-sized HDMI port for a sturdy connection to an external recorder.
  • Faster buffer clearing: Supports a more advanced SD data transfer standard (UHS-II vs UHS-I).
  • More affordable: Was introduced into a lower priced category (47 percent cheaper at launch).
  • More modern: Was introduced somewhat (1 year and 1 month) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the G9 is the clear winner of the contest (17 : 10 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

A99 II 10:17 G9

How about other alternatives? Do the specifications of the Sony A99 II and the Panasonic G9 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the A99 II or the G9. 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.

Expert reviews

This is why expert reviews are important. 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.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Sony A99 II....4.5/585/1004.5/54.5/5 Sep 2016 3,199ebay.com
2.
 
Panasonic G9..+ +5/585/1005/55/5 Nov 2017 1,699ebay.com
3.
 
Canon 5DS R5/5+..83/1005/54.5/5 Feb 2015 3,699ebay.com
4.
 
Nikon D8504.5/5+ +5/589/1004.5/55/5 Jul 2017 3,299 amazon.com
5.
 
Olympus E-M1 II5/5+ +5/585/1004.5/54.5/5 Sep 2016 1,999ebay.com
6.
 
Panasonic G9 II5/5..4.5/587/100..4.5/5 Sep 2023 1,899 amazon.com
7.
 
Panasonic GH5 II4.5/5..4.5/585/1004.5/55/5 May 2021 1,699 amazon.com
8.
 
Panasonic GH54.5/5+ +..85/1004.5/55/5 Jan 2017 1,999ebay.com
9.
 
Panasonic G85..+ +..84/1005/54.5/5 Sep 2016 899ebay.com
10.
 
Pentax K-15/5....84/1005/55/5 Feb 2016 1,799ebay.com
11.
 
Sony A7R IIIA..+ +4/590/1004.5/55/5 Apr 2021 3,199 amazon.com
12.
 
Sony A7R III..+ +4/590/1004.5/55/5 Oct 2017 3,199ebay.com
13.
 
Sony A7R II5/5+ +5/590/1005/55/5 Jun 2015 3,199ebay.com
14.
 
Sony A7S II5/5+....4.5/55/5 Sep 2015 2,999ebay.com
15.
 
Sony A995/5....84/1004.5/54.5/5 Sep 2012 2,799ebay.com
16.
 
Sony A8503/5....75/100..4.5/5 Aug 2009 1,999ebay.com
17.
 
Sony A900..+ +..+ +4.5/55/5 Sep 2008 2,999ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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Care should be taken when interpreting the review scores above, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price 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.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Sony A99 II vs Panasonic G9

    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 Specifications
    Camera Model Sony A99 II Panasonic G9
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Sony A mount lenses Micro Four Thirds lenses
    Launch Date September 2016 November 2017
    Launch Price USD 3,199 USD 1,699
    Sensor Specs Sony A99 II Panasonic G9
    Sensor Technology BSI-CMOS CMOS
    Sensor Format Full Frame Sensor Four Thirds Sensor
    Sensor Size 35.9 x 24.0 mm 17.3 x 13.0 mm
    Sensor Area 861.6 mm2 224.9 mm2
    Sensor Diagonal 43.2 mm 21.6 mm
    Crop Factor 1.0x 2.0x
    Sensor Resolution 42.2 Megapixels 20.2 Megapixels
    Image Resolution 7952 x 5304 pixels 5184 x 3888 pixels
    Pixel Pitch 4.52 μm 3.34 μm
    Pixel Density 4.90 MP/cm2 8.96 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 4K/30p Video 4K/60p Video
    ISO Setting 100 - 25,600 ISO 200 - 25,600 ISO
    ISO Boost 50 - 25,600 ISO 100 - 25,600 ISO
    Image Processor BIONZ X Venus 10
    DXO Sensor Quality (score) 92 ..
    DXO Color Depth (bits) 25.4 ..
    DXO Dynamic Range (EV) 13.4 ..
    DXO Low Light (ISO) 2317 ..
    Screen Specs Sony A99 II Panasonic G9
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.78x 0.83x
    Viewfinder Resolution 2400k dots 3680k dots
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1229k dots 1040k dots
    LCD Attachment Fully flexible screen Swivel screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Sony A99 II Panasonic G9
    Focus System Phase-detect AF Contrast-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 12 shutter flaps/s 20 shutter flaps/s
    Shutter Life Expectancy300 000 actuations200 000 actuations
    Electronic Shutterno E-Shutterup to 1/32000s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image StabilizationIn-body stabilizationIn-body stabilization
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium MS or SDXC cards SDXC cards
    Single or Dual Card Slots Dual card slots Dual card slots
    UHS card support UHS-I Dual UHS-II
    Connectivity Specs Sony A99 II Panasonic G9
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 2.0 USB 3.0
    HDMI Port micro HDMI full HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication NFC built-in no NFC
    Bluetooth Support Bluetooth built-in Bluetooth built-in
    Body Specs Sony A99 II Panasonic G9
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type Sony NP-FM500H Panasonic DMW-BLF19
    Battery Life (CIPA)490 shots per charge400 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 143 x 104 x 76 mm
    (5.6 x 4.1 x 3.0 in)
    137 x 97 x 92 mm
    (5.4 x 3.8 x 3.6 in)
    Camera Weight 849 g (29.9 oz) 658 g (23.2 oz)
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    Check A99 II offers at
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    Check G9 offers at
    ebay.com

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