Sony A77 vs HX99
The Sony Alpha SLT-A77 and the Sony Cyber-shot DSC-HX99 are two digital cameras that were officially introduced, respectively, in August 2011 and August 2018. The A77 is a DSLR, while the HX99 is a fixed lens compact. The cameras are based on an APS-C (A77) and a 1/2.3-inch (HX99) sensor. The A77 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.
Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha SLT-A77 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.
The side-by-side display below illustrates the physical size and weight of the Sony A77 and the Sony HX99. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size dimensions are rounded to the nearest millimeter.
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 (60 percent) than the Sony A77. It is worth mentioning in this context that the A77 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 A77 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.
Concerning battery life, the A77 gets 470 shots out of its NP-FM500H battery, while the HX99 can take 370 images on a single charge of its NP-BX1 power pack. The power pack in the HX99 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 want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.
|1.||Sony A77||143 mm||104 mm||81 mm||732 g||470||Y||Aug 2011||1,399|
|2.||Sony HX99||102 mm||58 mm||36 mm||242 g||370||n||Aug 2018||449|
|3.||Canon SX730||110 mm||64 mm||40 mm||300 g||250||n||Apr 2017||399|
|4.||Canon 6D||145 mm||111 mm||71 mm||770 g||1090||Y||Sep 2012||2,099|
|5.||Panasonic GH5||139 mm||98 mm||87 mm||725 g||410||Y||Jan 2017||1,999|
|6.||Pentax K-3||131 mm||100 mm||77 mm||800 g||560||Y||Oct 2013||1,299|
|7.||Sony A6600||120 mm||67 mm||69 mm||503 g||810||Y||Aug 2019||1,399|
|8.||Sony HX95||102 mm||58 mm||36 mm||242 g||370||n||Aug 2018||429|
|9.||Sony WX800||102 mm||58 mm||36 mm||233 g||370||n||Oct 2018||399|
|10.||Sony A9||127 mm||96 mm||63 mm||673 g||650||Y||Apr 2017||4,499|
|11.||Sony A6500||120 mm||67 mm||53 mm||453 g||350||Y||Oct 2016||1,399|
|12.||Sony HX90V||102 mm||58 mm||36 mm||245 g||360||n||Apr 2015||429|
|13.||Sony A68||143 mm||104 mm||81 mm||610 g||540||n||Nov 2015||699|
|14.||Sony A7 II||127 mm||96 mm||60 mm||599 g||350||Y||Nov 2014||1,999|
|15.||Sony A77 II||143 mm||104 mm||81 mm||647 g||480||Y||May 2014||1,199|
|16.||Sony HX400V||130 mm||93 mm||103 mm||660 g||300||n||Feb 2014||499|
|17.||Sony A99||147 mm||111 mm||78 mm||812 g||500||Y||Sep 2012||2,799|
|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 retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The HX99 was launched at a lower price than the A77, despite having a lens built in. 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 sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units 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 are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.
Of the two cameras under consideration, the Sony A77 features an APS-C sensor and the Sony HX99 a 1/2.3-inch sensor. The sensor area in the HX99 is 92 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 5.6. The sensor in the A77 has a native 3:2 aspect ratio, while the one in the HX99 offers a 4:3 aspect.
With 24MP, the A77 offers a higher resolution than the HX99 (18MP), but the A77 nevertheless has larger individual pixels (pixel pitch of 3.91μm versus 1.25μm for the HX99) due to its larger sensor. However, the HX99 is a much more recent model (by 7 years) than the A77, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that the HX99 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Sony A77 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A77 for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 cm. The corresponding values for the Sony HX99 are 24.5 x 18.4 inches or 62.2 x 46.6 cm for good quality, 19.6 x 14.7 inches or 49.7 x 37.3 cm for very good quality, and 16.3 x 12.2 inches or 41.5 x 31.1 cm for excellent quality prints.
The Sony Alpha SLT-A77 has a native sensitivity range from ISO 100 to ISO 16000, which can be extended to ISO 50-25600. 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.
For many cameras, data on sensor performance has been reported by DXO Mark. 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.
|4.||Canon 6D||Full Frame||20.0||5472||3648||1080/30p||23.8||12.1||2340||82|
|5.||Panasonic GH5||Four Thirds||20.2||5184||3888||4K/60p||23.9||13.0||807||77|
|10.||Sony A9||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92|
|14.||Sony A7 II||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|15.||Sony A77 II||APS-C||24.0||6000||4000||1080/60p||23.5||12.7||1442||77|
|17.||Sony A99||Full Frame||24.0||6000||4000||1080/60p||25.0||14.0||1555||89|
|Note: DXO values in italics represent estimates based on sensor size and age.|
Many modern cameras cannot only take still pictures, but also record videos. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the HX99 provides a better video resolution than the A77. It can shoot movie footage at 4K/30p, while the A77 is limited to 1080/60p.
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 A77 offers a substantially higher resolution than the one in the HX99 (2359k vs 638k dots). The table below summarizes some of the other core capabilities of the Sony A77 and Sony HX99 in connection with corresponding information for a sample of similar cameras.
|1.||Sony A77||2359||Y||3.0 / 921||full-flex||n||1/8000s||12.0||Y||Y|
|2.||Sony HX99||638||n||3.0 / 922||tilting||Y||1/2000s||10.0||Y||Y|
|3.||Canon SX730||none||n||3.0 / 922||tilting||n||1/3200s||5.9||Y||Y|
|4.||Canon 6D||optical||Y||3.0 / 1040||fixed||n||1/4000s||4.5||n||n|
|5.||Panasonic GH5||3680||n||3.2 / 1620||swivel||Y||1/8000s||12.0||n||Y|
|6.||Pentax K-3||optical||Y||3.2 / 1037||fixed||n||1/8000s||8.3||Y||Y|
|7.||Sony A6600||2359||n||3.0 / 922||tilting||Y||1/4000s||11.0||n||Y|
|8.||Sony HX95||638||n||3.0 / 922||tilting||n||1/2000s||10.0||Y||Y|
|9.||Sony WX800||none||n||3.0 / 922||tilting||Y||1/2000s||10.0||Y||Y|
|10.||Sony A9||3686||n||3.0 / 1440||tilting||Y||1/8000s||20.0||n||Y|
|11.||Sony A6500||2359||n||3.0 / 922||tilting||Y||1/4000s||11.0||Y||Y|
|12.||Sony HX90V||638||n||3.0 / 921||tilting||n||1/2000s||10.0||Y||Y|
|13.||Sony A68||1440||Y||2.7 / 460||tilting||n||1/4000s||8.0||Y||Y|
|14.||Sony A7 II||2400||n||3.0 / 1230||tilting||n||1/8000s||5.0||n||Y|
|15.||Sony A77 II||2359||Y||3.0 / 1229||full-flex||n||1/8000s||12.0||Y||Y|
|16.||Sony HX400V||210||n||3.0 / 921||tilting||n||1/4000s||10.0||Y||Y|
|17.||Sony A99||2359||Y||3.0 / 1229||full-flex||n||1/8000s||6.0||n||Y|
One feature that is present on the A77, but is missing on the HX99 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.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.
Concerning the storage of imaging data, both the A77 and the HX99 write their files to SDXC or Memory Stick PRO Duo cards. Both cameras can use UHS-I cards, which provide for Ultra High Speed data transfer of up to 104 MB/s.
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 SLT-A77 and Sony Cyber-shot DSC-HX99 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Sony A77||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
|2.||Sony HX99||-||stereo / mono||-||-||micro||2.0||Y||Y||Y|
|3.||Canon SX730||-||stereo / mono||-||-||micro||2.0||Y||Y||Y|
|4.||Canon 6D||Y||mono / mono||Y||-||mini||2.0||Y||-||-|
|5.||Panasonic GH5||Y||stereo / mono||Y||Y||full||3.1||Y||-||Y|
|6.||Pentax K-3||Y||mono / mono||Y||Y||mini||3.0||-||-||-|
|7.||Sony A6600||Y||stereo / mono||Y||Y||YES||2.0||Y||Y||Y|
|8.||Sony HX95||-||stereo / mono||-||-||micro||2.0||Y||Y||Y|
|9.||Sony WX800||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|10.||Sony A9||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||Y|
|11.||Sony A6500||Y||stereo / mono||Y||-||micro||2.0||Y||Y||-|
|12.||Sony HX90V||-||stereo / mono||-||-||micro||2.0||Y||Y||-|
|13.||Sony A68||Y||stereo / mono||Y||-||micro||2.0||-||-||-|
|14.||Sony A7 II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|15.||Sony A77 II||Y||stereo / mono||Y||-||mini||2.0||Y||Y||-|
|16.||Sony HX400V||Y||stereo / mono||-||-||micro||2.0||Y||Y||-|
|17.||Sony A99||Y||stereo / mono||Y||Y||mini||2.0||-||-||-|
It is notable that the A77 has a hotshoe, while the HX99 does not. This socket makes it possible to easily attach optional accessories, such as an external flash gun.
Studio photographers will appreciate that the Sony A77 (unlike the HX99) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.
Travel and landscape photographers will find it useful that the A77 has an internal geolocalization sensor and can record GPS coordinates in its EXIF data.
The HX99 is a recent model that features in the current product line-up of Sony. In contrast, the A77 has been discontinued (but can be found pre-owned on eBay). As a replacement in the same line of cameras, the A77 was succeeded by the Sony A77 II. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Sony website.
So what conclusions can be drawn? Is the Sony A77 better than the Sony HX99 or vice versa? The listing below highlights the relative strengths of the two models.
Advantages of the Sony Alpha SLT-A77:
- More detail: Offers more megapixels (24 vs 18MP) with a 18% higher linear resolution.
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- 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 sound: Can connect to an external microphone for higher quality sound recording.
- More detailed viewfinder: Has higher resolution electronic viewfinder (2359k vs 638k dots).
- Easier setting verification: Features an LCD display on top to control shooting parameters.
- More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/2000s) to freeze action.
- Faster burst: Shoots at higher frequency (12 vs 10 flaps/sec) to capture the decisive moment.
- More flexible: Can take a variety of interchangeable lenses, including specialty optics.
- Longer lasting: Can take more shots (470 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.
- Easier geotagging: Features an internal GPS sensor to log localization data.
- Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
- More heavily discounted: Has been available for much longer (launched in August 2011).
Reasons to prefer the Sony Cyber-shot DSC-HX99:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better video: Provides higher definition movie capture (4K/30p vs 1080/60p).
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- Ready to shoot: Comes with an integrated lens, while the A77 requires a separate lens.
- More compact: Is smaller (102x58mm vs 143x104mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight even though it has a lens built in (unlike the A77).
- Easier travel charging: Can be conveniently charged via its USB port.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- More affordable: Was introduced at a lower price, despite coming with a built-in lens.
- More modern: Reflects 7 years of technical progress since the A77 launch.
If the number of relative strengths (bullet points above) is taken as a guide, the A77 is the clear winner of the match-up (19 : 12 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.
How about other alternatives? Do the specifications of the Sony A77 and the Sony HX99 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Superzoom 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 A77 or the HX99 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 hands-on reviews by experts are important. The following table reports the overall ratings of the cameras as published by some of the major 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.
|1.||Sony A77||5/5||91/100||..||81/100||..||5/5||Aug 2011||1,399|
|2.||Sony HX99||..||..||..||..||4/5||4.5/5||Aug 2018||449|
|3.||Canon SX730||..||+||..||..||4/5||4/5||Apr 2017||399|
|4.||Canon 6D||5/5||+ +||..||83/100||4.5/5||4.5/5||Sep 2012||2,099|
|5.||Panasonic GH5||4.5/5||+ +||..||85/100||4.5/5||5/5||Jan 2017||1,999|
|6.||Pentax K-3||4/5||..||..||83/100||5/5||5/5||Oct 2013||1,299|
|7.||Sony A6600||4/5||+||4/5||83/100||4.5/5||4/5||Aug 2019||1,399|
|8.||Sony HX95||..||..||..||..||..||..||Aug 2018||429|
|9.||Sony WX800||..||..||..||..||..||..||Oct 2018||399|
|10.||Sony A9||5/5||+ +||4.8/5||89/100||5/5||5/5||Apr 2017||4,499|
|11.||Sony A6500||5/5||+ +||3.5/5||85/100||4.5/5||4.5/5||Oct 2016||1,399|
|12.||Sony HX90V||4/5||+ +||..||..||4/5||4.5/5||Apr 2015||429|
|13.||Sony A68||3/5||..||..||..||4/5||4/5||Nov 2015||699|
|14.||Sony A7 II||5/5||+||4/5||82/100||4.5/5||5/5||Nov 2014||1,999|
|15.||Sony A77 II||4/5||..||..||80/100||4.5/5||5/5||May 2014||1,199|
|16.||Sony HX400V||4/5||+ +||..||..||4/5||4/5||Feb 2014||499|
|17.||Sony A99||5/5||..||..||84/100||4.5/5||4.5/5||Sep 2012||2,799|
|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 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.
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 use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
Specifications: Sony A77 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 Model||Sony A77||Sony HX99|
|Camera Type||Digital single lens reflex||Fixed lens compact camera|
|Camera Lens||Sony A mount lenses||24-720mm f/3.5-6.4|
|Launch Date||August 2011||August 2018|
|Launch Price||USD 1,399||USD 449|
|Sensor Specs||Sony A77||Sony HX99|
|Sensor Format||APS-C Sensor||1/2.3" Sensor|
|Sensor Size||23.5 x 15.6 mm||6.17 x 4.55 mm|
|Sensor Area||366.6 mm2||28.0735 mm2|
|Sensor Diagonal||28.2 mm||7.7 mm|
|Sensor Resolution||24 Megapixels||18 Megapixels|
|Image Resolution||6000 x 4000 pixels||4896 x 3672 pixels|
|Pixel Pitch||3.91 μm||1.25 μm|
|Pixel Density||6.55 MP/cm2||64.04 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||1080/60p Video||4K/30p Video|
|ISO Setting||100 - 16,000 ISO||80 - 3,200 ISO|
|ISO Boost||50 - 25,600 ISO||80 - 6,400 ISO|
|Image Processor||BIONZ X||BIONZ X|
|DXO Sensor Quality (score)||78||..|
|DXO Color Depth (bits)||24.0||..|
|DXO Dynamic Range (EV)||13.2||..|
|DXO Low Light (ISO)||801||..|
|Screen Specs||Sony A77||Sony HX99|
|Viewfinder Type||Electronic viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%||100%|
|Viewfinder Resolution||2359k dots||638k dots|
|Top-Level Screen||Control Panel||no Top Display|
|LCD Framing||Live View||Live View|
|Rear LCD Size||3.0inch||3.0inch|
|LCD Resolution||921k dots||922k dots|
|LCD Attachment||Fully flexible screen||Tilting screen|
|Touch Input||no Touchscreen||Touchscreen|
|Shooting Specs||Sony A77||Sony HX99|
|Focus System||Phase-detect AF||Contrast-detect AF|
|Manual Focusing Aid||Focus Peaking||no Peaking Feature|
|Continuous Shooting||12 shutter flaps/s||10 shutter flaps/s|
|Image Stabilization||In-body stabilization||Lens-based stabilization|
|Fill Flash||Built-in Flash||Built-in Flash|
|Storage Medium||MS or SDXC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||UHS-I||UHS-I|
|Connectivity Specs||Sony A77||Sony HX99|
|External Flash||Hotshoe||no Hotshoe|
|Studio Flash||PC Sync socket||no PC Sync|
|USB Connector||USB 2.0||USB 2.0|
|HDMI Port||mini HDMI||micro HDMI|
|Microphone Port||External MIC port||no MIC socket|
|Wifi Support||no Wifi||Wifi built-in|
|Near-Field Communication||no NFC||NFC built-in|
|Bluetooth Support||no Bluetooth||Bluetooth built-in|
|Geotagging||GPS built-in||no internal GPS|
|Body Specs||Sony A77||Sony HX99|
|Environmental Sealing||Weathersealed body||not weather sealed|
|Battery Life (CIPA)||470 shots per charge||370 shots per charge|
|In-Camera Charging||no USB charging||USB charging|
143 x 104 x 81 mm
(5.6 x 4.1 x 3.2 in)
102 x 58 x 36 mm
(4.0 x 2.3 x 1.4 in)
|Camera Weight||732 g (25.8 oz)||242 g (8.5 oz)|
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