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Sony A7 III vs HX99

The Sony Alpha A7 III and the Sony Cyber-shot DSC-HX99 are two digital cameras that were officially introduced, respectively, in February 2018 and August 2018. The A7 III is a mirrorless interchangeable lens camera, while the HX99 is a fixed lens compact. The cameras are based on a full frame (A7 III) and a 1/2.3-inch (HX99) sensor. The A7 III has a resolution of 24 megapixels, whereas the HX99 provides 18 MP.

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

Headline Specifications
Sony A7 III   Sony HX99
Sony A7 III Sony HX99
Mirrorless system camera Fixed lens compact camera
Sony E mount lenses 24-720mm f/3.5-6.4
24 MP, Full Frame Sensor 18 MP, 1/2.3" Sensor
4K/30p Video 4K/30p Video
ISO 100-51200 (50-204800) ISO 80-3200 (80-6400)
Electronic viewfinder (2359k dots) Electronic viewfinder (638k dots)
3.0" LCD, 922k dots 3.0" LCD, 922k dots
Tilting touchscreen Tilting touchscreen
10 shutter flaps per second 10 shutter flaps per second
In-body stabilizationLens-based stabilization
Weathersealed bodyNot weather sealed
610 shots per battery charge370 shots per battery charge
127 x 96 x 74 mm, 650 g 102 x 58 x 36 mm, 242 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha A7 III and the Sony Cyber-shot DSC-HX99? 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.

Body comparison: Sony A7 III vs HX99

The side-by-side display below illustrates the physical size and weight of the Sony A7 III and the Sony HX99. 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.

Size Sony A7 III vs Sony HX99
Compare A7 III versus HX99 top
Comparison A7 III or HX99 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony HX99 is considerably smaller (51 percent) than the Sony A7 III. It is worth mentioning in this context that the A7 III is splash and dust resistant, while the HX99 does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the HX99 has a lens built in, whereas the A7 III is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup. You can compare the optics available for the A7 III and their specifications in the Sony FE Lens Catalog.

Concerning battery life, the A7 III gets 610 shots out of its NP-FZ100 battery, while the HX99 can take 370 images on a single charge of its NP-BX1 power pack. The battery packs of both cameras can be charged via USB, 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, just click on the right or left arrow next to the camera that you would like to inspect. Alternatively, you can also use the CAM-parator to select your camera combination among a larger number of options.

Camera Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(yes/no)
Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Sony A7 III» 5.0 in 3.8 in 2.9 in 22.9 oz 610 Y Feb 2018 1,999 i i Sony A7 III
 
Sony HX99« 4.0 in 2.3 in 1.4 in 8.5 oz 370 n Aug 2018 449 i i Sony HX99
 
Canon 6D Mark II« » 5.7 in 4.4 in 3.0 in 27.0 oz 1200 Y Jun 2017 1,999 i i Canon 6D Mark II
 
Canon SX730« » 4.3 in 2.5 in 1.6 in 10.6 oz 250 n Apr 2017 399- i Canon SX730
 
Nikon Z6« » 5.3 in 4.0 in 2.6 in 23.8 oz 310 Y Aug 2018 1,999 i i Nikon Z6
 
Nikon W300« » 4.4 in 2.6 in 1.1 in 8.1 oz 280 Y May 2017 389 i i Nikon W300
 
Sony A7R IV« » 5.1 in 3.8 in 3.1 in 23.5 oz 670 Y Jul 2019 3,499 i i Sony A7R IV
 
Sony HX95« » 4.0 in 2.3 in 1.4 in 8.5 oz 370 n Aug 2018 429 i i Sony HX95
 
Sony WX800« » 4.0 in 2.3 in 1.4 in 8.2 oz 370 n Oct 2018 399 i i Sony WX800
 
Sony A7R III« » 5.0 in 3.8 in 2.9 in 22.9 oz 650 Y Oct 2017 3,199 i i Sony A7R III
 
Sony A9« » 5.0 in 3.8 in 2.5 in 23.7 oz 650 Y Apr 2017 4,499 i i Sony A9
 
Sony A7R II« » 5.0 in 3.8 in 2.4 in 22.0 oz 290 Y Jun 2015 3,199- i Sony A7R II
 
Sony A7S II« » 5.0 in 3.8 in 2.4 in 22.1 oz 370 Y Sep 2015 2,999 i i Sony A7S II
 
Sony A7 II« » 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999- i Sony A7 II
 
Sony HX400V« » 5.1 in 3.7 in 4.1 in 23.3 oz 300 n Feb 2014 499 i i Sony HX400V
 
Sony A7« » 5.0 in 3.7 in 1.9 in 16.7 oz 340 Y Oct 2013 1,699- i Sony A7
 
Sony A850« » 6.1 in 4.6 in 3.2 in 31.6 oz 880 Y Aug 2009 1,999- i Sony A850
Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.

Any camera decision will obviously take relative prices into account. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The HX99 was launched at a lower price than the A7 III, despite having a lens built in. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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: Sony A7 III vs HX99

The size of the sensor inside a digital camera is one of the key determinants 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. 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 Sony A7 III features a full frame sensor and the Sony HX99 a 1/2.3-inch sensor. The sensor area in the HX99 is 97 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 5.6. The sensor in the A7 III has a native 3:2 aspect ratio, while the one in the HX99 offers a 4:3 aspect.

Sony A7 III and Sony HX99 sensor measures

With 24MP, the A7 III offers a higher resolution than the HX99 (18MP), but the A7 III nevertheless has larger individual pixels (pixel pitch of 5.94μm versus 1.25μm for the HX99) due to its larger sensor. However, the HX99 is a somewhat more recent model (by 6 months) than the A7 III, 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 A7 III implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A7 III for good quality output (200 dots per inch) amounts to 30 x 20 inch or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inch or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inch or 50.8 x 33.9 cm. The corresponding values for the Sony HX99 are 24.5 x 18.4 inch or 62.2 x 46.6 cm for good quality, 19.6 x 14.7 inch or 49.7 x 37.3 cm for very good quality, and 16.3 x 12.2 inch or 41.5 x 31.1 cm for excellent quality prints.

The A7 III has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.

The Sony Alpha A7 III has a native sensitivity range from ISO 100 to ISO 51200, which can be extended to ISO 50-204800. The corresponding ISO settings for the Sony Cyber-shot DSC-HX99 are ISO 80 to ISO 3200, with the possibility to increase the ISO range to 80-6400.

A7 III versus HX99 MP

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. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

Sensor Characteristics
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Camera
Model
 
Sony A7 III» Full Frame 24.0 6000 40004K/30p25.014.7373096Sony A7 III
 
Sony HX99« 1/2.3 18.0 4896 36724K/30p----Sony HX99
 
Canon 6D Mark II« » Full Frame 26.0 6240 41601080/60p24.411.9286285Canon 6D Mark II
 
Canon SX730« » 1/2.3 20.2 5184 38881080/60p----Canon SX730
 
Nikon Z6« » Full Frame 24.3 6048 40244K/30p25.314.3329995Nikon Z6
 
Nikon W300« » 1/2.3 15.9 4608 34564K/30p----Nikon W300
 
Sony A7R IV« » Full Frame 60.2 9504 63364K/30p----Sony A7R IV
 
Sony HX95« » 1/2.3 18.0 4896 36724K/30p----Sony HX95
 
Sony WX800« » 1/2.3 18.0 4896 36724K/30p----Sony WX800
 
Sony A7R III« » Full Frame 42.2 7952 53044K/30p26.014.73523100Sony A7R III
 
Sony A9« » Full Frame 24.0 6000 40004K/30p24.913.3351792Sony A9
 
Sony A7R II« » Full Frame 42.2 7952 53044K/30p26.013.9343498Sony A7R II
 
Sony A7S II« » Full Frame 12.0 4240 28324K/30p23.613.3299385Sony A7S II
 
Sony A7 II« » Full Frame 24.0 6000 40001080/60p24.913.6244990Sony A7 II
 
Sony HX400V« » 1/2.3 20.2 5184 38881080/60p----Sony HX400V
 
Sony A7« » Full Frame 24.0 6000 40001080/60p24.814.2224890Sony A7
 
Sony A850« » Full Frame 24.4 6048 4032-23.812.2141579Sony A850

Many modern cameras are not only capable of taking still images, but can also record movies. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, and both provide the same movie specifications (4K/30p).

 

Feature comparison: Sony A7 III vs HX99

Apart from 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 A7 III offers a substantially higher resolution than the one in the HX99 (2359k vs 638k dots). The adjacent table lists some of the other core features of the Sony A7 III and Sony HX99 along with similar information for a selection of comparators.

Core Features
  Camera
Model
Viewfinder
(Type or
'000 dots)
Control
Panel
(yes/no)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Mech
Shutter
Speed
Shutter
Flaps
(1/sec)
Built-in
Flash
(yes/no)
Built-in
Image
Stab
Camera
Model
 
Sony A7 III»2359 n 3.0 922 tilting Y 1/8000s 10.0 n Y Sony A7 III
 
Sony HX99«638 n 3.0 922 tilting Y 1/2000s 10.0 Y Y Sony HX99
 
Canon 6D Mark II« »optical Y 3.0 1040 swivel Y 1/4000s 6.5 n n Canon 6D Mark II
 
Canon SX730« »- n 3.0 922 tilting n 1/3200s 5.9 Y Y Canon SX730
 
Nikon Z6« »3690 Y 3.2 2100 tilting Y 1/8000s 12.0 n Y Nikon Z6
 
Nikon W300« »- n 3.0 921 fixed n 1/4000s 7.0 Y Y Nikon W300
 
Sony A7R IV« »5760 n 3.0 1440 tilting Y 1/8000s 10.0 n Y Sony A7R IV
 
Sony HX95« »638 n 3.0 922 tilting n 1/2000s 10.0 Y Y Sony HX95
 
Sony WX800« »- n 3.0 922 tilting Y 1/2000s 10.0 Y Y Sony WX800
 
Sony A7R III« »3686 n 3.0 1440 tilting Y 1/8000s 10.0 n Y Sony A7R III
 
Sony A9« »3686 n 3.0 1440 tilting Y 1/8000s 20.0 n Y Sony A9
 
Sony A7R II« »2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y Sony A7R II
 
Sony A7S II« »2400 n 3.0 1229 tilting n 1/8000s 5.0 n Y Sony A7S II
 
Sony A7 II« »2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y Sony A7 II
 
Sony HX400V« »210 n 3.0 921 tilting n 1/4000s 10.0 Y Y Sony HX400V
 
Sony A7« »2400 n 3.0 1230 tilting n 1/8000s 5.0 n n Sony A7
 
Sony A850« »optical Y 3.0 922 fixed n 1/8000s 3.0 n Y Sony A850

One difference between the cameras concerns the presence of an on-board flash. The HX99 has one, while the A7 III does not. While the built-in flash of the HX99 is not very powerful, it can at times be useful as a fill-in light.

The HX99 has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the A7 III 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 A7 III 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 Sony A7 III 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.

Concerning the storage of imaging data, both the A7 III and the HX99 write their files to SDXC or Memory Stick PRO Duo cards. The A7 III features dual card slots, which can be very useful in case a memory card fails. In contrast, the HX99 only has one slot. The A7 III supports UHS-II cards on its first slot and UHS-I on its second one, while the HX99 cannot take advantage of Ultra High Speed SD cards.

 

Connectivity comparison: Sony A7 III vs HX99

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 A7 III and Sony Cyber-shot DSC-HX99 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Type
WiFi
Support
NFC
Support
Bluetooth
Support
Camera
Model
 
Sony A7 III»YstereomonoYYmicro3.1YYYSony A7 III
 
Sony HX99«-stereomono--micro2.0YYYSony HX99
 
Canon 6D Mark II« »YstereomonoY-mini2.0YYYCanon 6D Mark II
 
Canon SX730« »-stereomono--micro2.0YYYCanon SX730
 
Nikon Z6« »YstereomonoYYmicro3.1Y-YNikon Z6
 
Nikon W300« »-stereomono--micro2.0Y-YNikon W300
 
Sony A7R IV« »YstereomonoYYmicro3.1YYYSony A7R IV
 
Sony HX95« »-stereomono--micro2.0YYYSony HX95
 
Sony WX800« »-stereomono--micro2.0YY-Sony WX800
 
Sony A7R III« »YstereomonoYYmicro3.1YYYSony A7R III
 
Sony A9« »YstereomonoYYmicro2.0YYYSony A9
 
Sony A7R II« »YstereomonoYYmicro2.0YY-Sony A7R II
 
Sony A7S II« »YstereomonoYYmicro2.0YY-Sony A7S II
 
Sony A7 II« »YstereomonoYYmicro2.0YY-Sony A7 II
 
Sony HX400V« »Ystereomono--micro2.0YY-Sony HX400V
 
Sony A7« »YstereomonoYYmicro2.0YY-Sony A7
 
Sony A850« »Y----mini2.0---Sony A850

It is notable that the A7 III has a hotshoe, while the HX99 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.

Both the A7 III and the HX99 are recent models that are part of the current product line-up. The A7 III replaced the earlier Sony A7 II, while the HX99 does not have a direct predecessor. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Sony website.


Review summary: Sony A7 III vs HX99

So how do things add up? Which of the two cameras – the Sony A7 III or the Sony HX99 – has the upper hand? Is one clearly better than the other? The listing below highlights the relative strengths of the two models.


Arguments in favor of the Sony Alpha A7 III:

  • More detail: Offers more megapixels (24 vs 18MP) with a 18% 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.
  • Better sound: Can connect to an external microphone for higher quality sound recording.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • More detailed viewfinder: Has higher resolution electronic viewfinder (2359k vs 638k dots).
  • Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/2000s) to freeze action.
  • 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 flexible: Accepts interchangeable lenses, so that lens characteristics can be altered.
  • Longer lasting: Can take more shots (610 versus 370) on a single battery charge.
  • Better sealing: Is weather sealed to enable shooting in dusty or wet environments.
  • Better lighting: Features a hotshoe and can thus hold and trigger an external flash gun.
  • Faster data transfer: Supports a more advanced USB protocol (3.1 vs 2.0).
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • Faster buffer clearing: Supports Ultra High Speed (UHS-II and UHS-I) SDXC cards.
  • More heavily discounted: Has been on the market for longer (launched in February 2018).


Advantages of the Sony Cyber-shot DSC-HX99:

  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Ready to shoot: Has an integrated lens, whereas the A7 III necessitates an extra lens.
  • More compact: Is smaller (102x58mm vs 127x96mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight even though it has a lens built in (unlike the A7 III).
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced at a lower price, despite coming with a built-in lens.
  • More modern: Was introduced somewhat (6 months) more recently.

If the number of relative strengths (bullet points above) is taken as a guide, the A7 III is the clear winner of the match-up (20 : 7 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 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.

A7 III 20:07 HX99

How about other alternatives? Do the specifications of the Sony A7 III and the Sony HX99 place the cameras among the top in their class? Find out in the latest Best Mirrorless Interchangeable Lens Camera and Best Superzoom 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 A7 III or the HX99. 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: Sony A7 III vs HX99

This is why expert reviews are important. The adjacent summary-table relays the overall verdicts of several of the most popular camera 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.

Review Scores
  Camera
Model
cameralabs dpreview ephotozine imaging-resource photographyblog Camera
Launch
(announced)
Launch
Price
(USD)
Street
Price
(USD)
Used
Price
(USD)
Camera
Model
 
Sony A7 III»+ +89/1005/55/55/5 Feb 2018 1,999 i i Sony A7 III
 
Sony HX99«--4/5-4.5/5 Aug 2018 449 i i Sony HX99
 
Canon 6D Mark II« »+80/1004.5/54/54/5 Jun 2017 1,999 i i Canon 6D Mark II
 
Canon SX730« »+-4/5-4/5 Apr 2017 399- i Canon SX730
 
Nikon Z6« »--4.5/5-5/5 Aug 2018 1,999 i i Nikon Z6
 
Nikon W300« »+-4/5-4/5 May 2017 389 i i Nikon W300
 
Sony A7R IV« »----- Jul 2019 3,499 i i Sony A7R IV
 
Sony HX95« »----- Aug 2018 429 i i Sony HX95
 
Sony WX800« »----- Oct 2018 399 i i Sony WX800
 
Sony A7R III« »+ +90/1004.5/55/55/5 Oct 2017 3,199 i i Sony A7R III
 
Sony A9« »+ +89/1005/55/55/5 Apr 2017 4,499 i i Sony A9
 
Sony A7R II« »+ +90/1005/54.5/55/5 Jun 2015 3,199- i Sony A7R II
 
Sony A7S II« »+-4.5/55/55/5 Sep 2015 2,999 i i Sony A7S II
 
Sony A7 II« »+82/1004.5/55/55/5 Nov 2014 1,999- i Sony A7 II
 
Sony HX400V« »+ +-4/5-4/5 Feb 2014 499 i i Sony HX400V
 
Sony A7« »+ +80/1005/54.5/55/5 Oct 2013 1,699- i Sony A7
 
Sony A850« »-75/100-4/54.5/5 Aug 2009 1,999- i Sony A850
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (-) not available.

Care should be taken when interpreting the review scores above, though. The ratings are only valid when referring to cameras in the same category and of the same age. 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.

Sony A7 III:
Check Amazon price
Sony HX99:
Check Amazon price

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 use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

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    Specifications: Sony A7 III vs Sony HX99

    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 A7 III Sony HX99
    Camera Type Mirrorless system camera Fixed lens compact camera
    Camera Lens Sony E mount lenses 24-720mm f/3.5-6.4
    Launch Date February 2018 August 2018
    Launch Price USD 1999 USD 449
    Sensor Specs Sony A7 III Sony HX99
    Sensor Technology BSI-CMOS CMOS
    Sensor Format Full Frame Sensor 1/2.3" Sensor
    Sensor Size 35.6 x 23.8 mm 6.17 x 4.55 mm
    Sensor Area 847.28 mm2 28.0735 mm2
    Sensor Diagonal 42.8 mm 7.7 mm
    Crop Factor 1.0x 5.6x
    Sensor Resolution 24 Megapixels 18 Megapixels
    Image Resolution 6000 x 4000 pixels 4896 x 3672 pixels
    Pixel Pitch 5.94 μm 1.25 μm
    Pixel Density 2.83 MP/cm2 64.04 MP/cm2
    Moiré control no AA filter no AA filter
    Movie Capability 4K/30p Video 4K/30p Video
    ISO Setting 100-51200 ISO 80-3200 ISO
    ISO Boost 50-204800 ISO 80-6400 ISO
    Image Processor BIONZ X BIONZ X
    DXO Sensor Quality (score) 96 ..
    DXO Color Depth (bits) 25.0 ..
    DXO Dynamic Range (EV) 14.7 ..
    DXO Low Light (ISO) 3730 ..
    Screen Specs Sony A7 III Sony HX99
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.78x ..x
    Viewfinder Resolution 2359k dots 638k dots
    LCD Framing Live View Live View
    Rear LCD Size 3.0 inch 3.0 inch
    LCD Resolution 922k dots 922k dots
    LCD Attachment Tilting screen Tilting screen
    Touch Input Touchscreen Touchscreen
    Shooting Specs Sony A7 III Sony HX99
    Autofocus System On-Sensor Phase-detect Contrast-detect AF
    Manual Focusing AidFocus PeakingNo Peaking Feature
    Continuous Shooting 10 shutter flaps/s 10 shutter flaps/s
    Electronic ShutterYESno E-Shutter
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationIn-body stabilizationLens-based stabilization
    Fill Flash no On-Board Flash Build-in Flash
    Storage Medium MS or SDXC cards MS or SDXC cards
    Second Storage Option Dual card slots Single card slot
    UHS card support Single UHS-II no
    Connectivity Specs Sony A7 III Sony HX99
    External Flash Hotshoe no Hotshoe
    USB Connector USB 3.1 USB 2.0
    HDMI Port micro HDMI micro HDMI
    Microphone Port External MIC port no MIC socket
    Headphone Socket Headphone port no Headphone port
    Wifi Support Wifi built-in Wifi built-in
    Near-Field Communication NFC built-in NFC built-in
    Bluetooth Support Bluetooth built-in Bluetooth built-in
    Body Specs Sony A7 III Sony HX99
    Environmental SealingWeathersealed bodyNot weather sealed
    Battery Type NP-FZ100 power pack NP-BX1 power pack
    Battery Life (CIPA)610 shots per charge370 shots per charge
    In-Camera Charging USB charging USB charging
    Body Dimensions 127 x 96 x 74 mm
    (5.0 x 3.8 x 2.9 in)
    102 x 58 x 36 mm
    (4.0 x 2.3 x 1.4 in)
    Camera Weight 650 g (22.9 oz) 242 g (8.5 oz)

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