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Sony A7 vs A77

The Sony Alpha A7 and the Sony Alpha SLT-A77 are two enthusiast cameras that were officially introduced, respectively, in October 2013 and August 2011. The A7 is a mirrorless interchangeable lens camera, while the A77 is a DSLR. The cameras are based on a full frame (A7) and an APS-C (A77) sensor. Both cameras offer a resolution of 24 megapixels.

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

Headline Specifications
Sony A7 versus Sony A77
Sony A7 Sony A77
Mirrorless system camera Digital single lens reflex
Sony E mount lenses Sony A mount lenses
24 MP, Full Frame Sensor 24 MP, APS-C Sensor
1080/60p Video 1080/60p Video
ISO 100-25,600 (50 - 51,200) ISO 100-16,000 (50 - 25,600)
Electronic viewfinder (2400k dots) Electronic viewfinder (2359k dots)
3.0 LCD, 1230k dots 3.0 LCD, 921k dots
Tilting screen (no touchscreen) Fully flexible screen (no touchscreen)
5 shutter flaps per second 12 shutter flaps per second
Lens stabilization onlyIn-body stabilization
Weathersealed bodyWeathersealed body
340 shots per battery charge470 shots per battery charge
127 x 94 x 48 mm, 474 g 143 x 104 x 81 mm, 732 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Sony Alpha A7 and the Sony Alpha SLT-A77? 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

An illustration of the physical size and weight of the Sony A7 and the Sony A77 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 width, height and depth measures are rounded to the nearest millimeter.

Size Sony A7 vs Sony A77
Compare A7 versus A77 top
Comparison A7 or A77 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A77 is notably larger (25 percent) than the Sony A7. Moreover, the A77 is substantially heavier (54 percent) than the A7. 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 A7 gets 340 shots out of its NP-FW50 battery, while the A77 can take 470 images on a single charge of its NP-FM500H power pack. The power pack in the A7 can be charged via the USB port, so that it is not always necessary to take the battery charger along when travelling.

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, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.

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Body Specifications
  Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life 1
Weather
Sealing
Camera
Launch 2
Launch
Price (USD)
Street
Price
 
Sony A7 5.0 in 3.7 in 1.9 in 16.7 oz 340 Y Oct 2013 1,699i
 
Sony A77 5.6 in 4.1 in 3.2 in 25.8 oz 470 Y Aug 2011 1,399i
 
Nikon D610 5.6 in 4.4 in 3.2 in 30.0 oz 900 Y Oct 2013 1,999 i
 
Panasonic GH4 5.2 in 3.7 in 3.3 in 19.8 oz 500 Y Feb 2014 1,499i
 
Pentax K-3 5.2 in 3.9 in 3.0 in 28.2 oz 560 Y Oct 2013 1,299i
 
Samsung NX1 5.5 in 4.0 in 2.6 in 19.4 oz 500 Y Sep 2014 1,499i
 
Sony A7 III 5.0 in 3.8 in 2.9 in 22.9 oz 610 Y Feb 2018 1,999 i
 
Sony A6300 4.7 in 2.6 in 1.9 in 14.3 oz 400 Y Feb 2016 999i
 
Sony A6500 4.7 in 2.6 in 2.1 in 16.0 oz 350 Y Oct 2016 1,399i
 
Sony A7 II 5.0 in 3.8 in 2.4 in 21.1 oz 350 Y Nov 2014 1,999i
 
Sony A7S 5.0 in 3.7 in 1.9 in 17.2 oz 380 Y Apr 2014 2,499i
 
Sony A77 II 5.6 in 4.1 in 3.2 in 22.8 oz 480 Y May 2014 1,199 i
 
Sony A7R 5.0 in 3.7 in 1.9 in 16.4 oz 340 Y Oct 2013 2,299i
 
Sony RX1R 4.4 in 2.6 in 2.8 in 17.0 oz 270 n Jun 2013 2,799i
 
Sony A99 5.8 in 4.4 in 3.1 in 28.6 oz 500 Y Sep 2012 2,799i
 
Sony RX1 4.4 in 2.6 in 2.8 in 17.0 oz 270 n Sep 2012 2,799i
Notes: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
(1) Number of images that can be taken on a full battery charge according to the CIPA-standard; (2) Official announcement.

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 A77 was launched at a somewhat lower price (by 18 percent) than the A7, which makes it more attractive for photographers on a tight budget. 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

The imaging sensor is at the core of digital cameras and its size is one of the main determining factors of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and 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 Sony A7 features a full frame sensor and the Sony A77 an APS-C sensor. The sensor area in the A77 is 57 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Sony A7 and Sony A77 sensor measures

Even though the A7 has a larger sensor, both cameras offer the same resolution of 24 megapixels. This implies that the A7 has a lower pixel density and larger individual pixels (with a pixel pitch of 5.97μm versus 3.91μm for the A77), which gives it a potential advantage in terms of light gathering capacity. In addition, the A7 is much more recent (by 2 years and 1 month) than the A77, and its sensor will have benefitted from technological advances during this time.

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

The Sony Alpha A7 has a native sensitivity range from ISO 100 to ISO 25600, which can be extended to ISO 50-51200. The corresponding ISO settings for the Sony Alpha SLT-A77 are ISO 100 to ISO 16000, with the possibility to increase the ISO range to 50-25600.

A7 versus A77 MP

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. Of the two cameras under review, the A7 provides substantially higher image quality than the A77, with an overall score that is 12 points higher. This advantage is based on 0.8 bits higher color depth, 1 EV in additional dynamic range, and 1.5 stops in additional low light sensitivity. 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
  Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
 
Sony A7 Full Frame 24.0 6000 40001080/60p24.814.2224890
 
Sony A77 APS-C 24.0 6000 40001080/60p24.013.280178
 
Nikon D610 Full Frame 24.2 6016 40161080/30p25.114.4292594
 
Panasonic GH4 Four Thirds 15.9 4608 34564K/30p23.212.879174
 
Pentax K-3 APS-C 24.1 6016 40001080/60i23.713.4121680
 
Samsung NX1 APS-C 28.0 6480 43204K/30p24.213.2136383
 
Sony A7 III Full Frame 24.0 6000 40004K/30p25.014.7373096
 
Sony A6300 APS-C 24.0 6000 40004K/30p24.413.7143785
 
Sony A6500 APS-C 24.0 6000 40004K/30p24.513.7140585
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
 
Sony A7S Full Frame 12.0 4240 28321080/60p23.913.2370287
 
Sony A77 II APS-C 24.0 6000 40001080/60p........
 
Sony A7R Full Frame 36.2 7360 49121080/60p25.614.1274695
 
Sony RX1R Full Frame 24.0 6000 40001080/60p25.013.6253791
 
Sony A99 Full Frame 24.0 6000 40001080/60p25.014.0155589
 
Sony RX1 Full Frame 24.0 6000 40001080/60p25.114.3253493

Many modern cameras are not only capable of taking still images, but also of capturing video footage. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, and both provide the same movie specifications (1080/60p).

Feature comparison

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 offers a slightly higher resolution than the one in the A77 (2400k vs 2359k dots). The table below summarizes some of the other core capabilities of the Sony A7 and Sony A77 in connection with corresponding information for a sample of similar cameras.

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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
 
Sony A72400 n 3.0 1230 tilting n 1/8000s 5.0 n n
 
Sony A772359 Y 3.0 921 full-flex n 1/8000s 12.0 Y Y
 
Nikon D610optical Y 3.2 921 fixed n 1/4000s 6.0 Y n
 
Panasonic GH42359 n 3.0 1036 swivel Y 1/8000s 12.0 Y n
 
Pentax K-3optical Y 3.2 1037 fixed n 1/8000s 8.3 Y Y
 
Samsung NX12360 Y 3.0 1036 tilting Y 1/8000s 15.0 Y n
 
Sony A7 III2359 n 3.0 922 tilting Y 1/8000s 10.0 n Y
 
Sony A63002359 n 3.0 922 tilting n 1/4000s 11.0 Y n
 
Sony A65002359 n 3.0 922 tilting Y 1/4000s 11.0 Y Y
 
Sony A7 II2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y
 
Sony A7S2400 n 3.0 921 tilting n 1/8000s 5.0 n n
 
Sony A77 II2359 Y 3.0 1229 full-flex n 1/8000s 12.0 Y Y
 
Sony A7R2400 n 3.0 1230 tilting n 1/8000s 4.0 n n
 
Sony RX1Roptional n 3.0 1229 fixed n 1/4000s 5.0 Y n
 
Sony A992359 Y 3.0 1229 full-flex n 1/8000s 6.0 n Y
 
Sony RX1optional n 3.0 1229 fixed n 1/4000s 5.0 Y n

One feature that differentiates the A77 and the A7 is in-body image stabilization (IBIS). The A77 reduces the risk of handshake-induced blur with all attached lenses, while the A7 offers no blur reduction with lenses that themselves do not provide optical image stabilization.

The A77 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 does not have a selfie-screen.

Concerning the storage of imaging data, both the A7 and the A77 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.

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 A7 and Sony Alpha SLT-A77 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
  Camera
Model
Hotshoe
Port
Internal
Microphone
Internal
Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
 
Sony A7YstereomonoYYmicro2.0YY-
 
Sony A77YstereomonoY-mini2.0---
 
Nikon D610YmonomonoYYmini2.0---
 
Panasonic GH4YstereomonoYYmicro2.0YY-
 
Pentax K-3YmonomonoYYmini3.0---
 
Samsung NX1YstereomonoYYmicro3.0YYY
 
Sony A7 IIIYstereomonoYYmicro3.1YYY
 
Sony A6300YstereomonoY-micro2.0YY-
 
Sony A6500YstereomonoY-micro2.0YY-
 
Sony A7 IIYstereomonoYYmicro2.0YY-
 
Sony A7SYstereomonoYYmicro2.0YY-
 
Sony A77 IIYstereomonoY-mini2.0YY-
 
Sony A7RYstereomonoYYmicro2.0YY-
 
Sony RX1RYstereomonoY-mini2.0---
 
Sony A99YstereomonoYYmini2.0---
 
Sony RX1YstereomonoY-mini2.0---

It is notable that the A7 has a headphone jack, which is not present on the A77 This port makes it possible to attach external headphones and monitor the quality of sound during the recording process.

Studio photographers will appreciate that the Sony A77 (unlike the A7) 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.

Both the A7 and the A77 have been discontinued, but can regularly be found used on eBay. The A77 was replaced by the Sony A77 II, while the A7 was followed by the Sony A7 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.

Review summary

So what is the bottom line? Which of the two cameras – the Sony A7 or the Sony A77 – has the upper hand? Is one clearly better than the other? A synthesis of the relative strong points of each of the models is listed below.


Reasons to prefer the Sony Alpha A7:

  • Better image quality: Scores substantially higher (12 points) in the DXO overall assessment.
  • More dynamic range: Captures a larger spectrum of light and dark details (1 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (1.5 stops ISO advantage).
  • Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
  • Better sound control: Has a headphone port that enables audio monitoring while recording.
  • More detailed LCD: Has a higher resolution rear screen (1230k vs 921k dots).
  • More compact: Is smaller (127x94mm vs 143x104mm) and thus needs less room in the bag.
  • Less heavy: Is lighter (by 258g or 35 percent) and hence easier to carry around.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • 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.
  • Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
  • More modern: Reflects 2 years and 1 month of technical progress since the A77 launch.


Advantages of the Sony Alpha SLT-A77:

  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.73x vs 0.71x).
  • Easier setting verification: Features a control panel on top to check shooting parameters.
  • More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
  • More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
  • Faster burst: Shoots at higher frequency (12 vs 5 flaps/sec) to capture the decisive moment.
  • Longer lasting: Gets more shots (470 versus 340) out of a single battery charge.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • 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 affordable: Was released into a lower priced segment (18 percent cheaper at launch).
  • More heavily discounted: Has been around for much longer (launched in August 2011).

If the count of relative strengths (bullet points above) is taken as a measure, the match-up finishes in a tie (12 points each). 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 12:12 A77

How about other alternatives? Do the specifications of the Sony A7 and the Sony A77 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 the spec-sheets of cameras can offer a general idea of their imaging potential, it says little about, for example, the shooting experience and imaging performance of the A7 and the A77 in practical situations. 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 table below provides a synthesis of the camera assessments of some of the best known photo-gear 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.

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Review Scores
  Camera
Model
camera
  labs  
dp
review  
ephoto
  zine  
imaging
resource
photography
  blog  
Camera
Launch
Launch
Price (USD)
Street
Price
 
Sony A7+ +80/1005/54.5/55/5 Oct 2013 1,699i
 
Sony A7791/10081/100..4.5/55/5 Aug 2011 1,399i
 
Nikon D610+ +87/1004.5/54.5/54.5/5 Oct 2013 1,999 i
 
Panasonic GH4+ +85/1005/55/55/5 Feb 2014 1,499i
 
Pentax K-3..83/1005/54.5/55/5 Oct 2013 1,299i
 
Samsung NX1..87/1005/54.5/55/5 Sep 2014 1,499i
 
Sony A7 III+ +89/1005/55/55/5 Feb 2018 1,999 i
 
Sony A6300+85/1005/55/55/5 Feb 2016 999i
 
Sony A6500+ +85/1004.5/55/54.5/5 Oct 2016 1,399i
 
Sony A7 II+82/1004.5/55/55/5 Nov 2014 1,999i
 
Sony A7S..86/1004.5/54.5/55/5 Apr 2014 2,499i
 
Sony A77 II..80/1004.5/54/55/5 May 2014 1,199 i
 
Sony A7R+ +82/1004.5/55/55/5 Oct 2013 2,299i
 
Sony RX1R....4/5o4.5/5 Jun 2013 2,799i
 
Sony A99..84/1004.5/5o4.5/5 Sep 2012 2,799i
 
Sony RX1..79/1004/54.5/54.5/5 Sep 2012 2,799i
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted with care, 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 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.

Sony A7:
Check Ebay offers
Sony A77:
Check Ebay offers

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: Sony A7 vs Sony A77

    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 Sony A77
    Camera Type Mirrorless system camera Digital single lens reflex
    Camera Lens Sony E mount lenses Sony A mount lenses
    Launch Date October 2013 August 2011
    Launch Price USD 1,699 USD 1,399
    Sensor Specs Sony A7 Sony A77
    Sensor Technology CMOS CMOS
    Sensor Format Full Frame Sensor APS-C Sensor
    Sensor Size 35.8 x 23.9 mm 23.5 x 15.6 mm
    Sensor Area 855.62 mm2 366.6 mm2
    Sensor Diagonal 43 mm 28.2 mm
    Crop Factor 1.0x 1.5x
    Sensor Resolution 24 Megapixels 24 Megapixels
    Image Resolution 6000 x 4000 pixels 6000 x 4000 pixels
    Pixel Pitch 5.97 μm 3.91 μm
    Pixel Density 2.80 MP/cm2 6.55 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/60p Video 1080/60p Video
    ISO Setting 100 - 25,600 ISO 100 - 16,000 ISO
    ISO Boost 50 - 51,200 ISO 50 - 25,600 ISO
    Image Processor BIONZ X BIONZ X
    DXO Sensor Quality (score) 90 78
    DXO Color Depth (bits) 24.8 24.0
    DXO Dynamic Range (EV) 14.2 13.2
    DXO Low Light (ISO) 2248 801
    Screen Specs Sony A7 Sony A77
    Viewfinder Type Electronic viewfinder Electronic viewfinder
    Viewfinder Field of View 100% 100%
    Viewfinder Magnification 0.71x 0.73x
    Viewfinder Resolution 2400k dots 2359k dots
    Top-Level Screen no Top Display Control Panel
    LCD Framing Live View Live View
    Rear LCD Size 3.0inch 3.0inch
    LCD Resolution 1230k dots 921k dots
    LCD Attachment Tilting screen Fully flexible screen
    Shooting Specs Sony A7 Sony A77
    Focus System On-Sensor Phase-detect Phase-detect AF
    Manual Focusing AidFocus PeakingFocus Peaking
    Max Shutter Speed (mechanical) 1/8000s 1/8000s
    Continuous Shooting 5 shutter flaps/s 12 shutter flaps/s
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash no On-Board Flash Build-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 A7 Sony A77
    External Flash Hotshoe Hotshoe
    Studio Flash no PC Sync PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port micro HDMI mini HDMI
    Microphone Port External MIC port External MIC port
    Headphone Socket Headphone port no Headphone port
    Wifi Support Wifi built-in no Wifi
    Near-Field Communication NFC built-in no NFC
    Geotagging no internal GPS GPS built-in
    Body Specs Sony A7 Sony A77
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type NP-FW50 NP-FM500H
    Battery Life (CIPA)340 shots per charge470 shots per charge
    In-Camera Charging USB charging no USB charging
    Body Dimensions 127 x 94 x 48 mm
    (5.0 x 3.7 x 1.9 in)
    143 x 104 x 81 mm
    (5.6 x 4.1 x 3.2 in)
    Camera Weight 474 g (16.7 oz) 732 g (25.8 oz)

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