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Nikon D4S vs Sony A850

The Nikon D4S and the Sony Alpha A850 are two professional cameras that were announced, respectively, in February 2014 and August 2009. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with a full frame sensor. The Nikon has a resolution of 16.2 megapixels, whereas the Sony provides 24.4 MP.

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

Headline Specifications
Nikon D4S versus Sony A850
Nikon D4S Sony A850
Digital single lens reflex Digital single lens reflex
Nikon F mount lenses Sony A mount lenses
16.2 MP, Full Frame Sensor 24.4 MP, Full Frame Sensor
1080/60p Video no Video
ISO 100-25,600 (50 - 409,600) ISO 200-3,200 (100 - 6,400)
Optical viewfinder Optical viewfinder
3.2 LCD, 921k dots 3.0 LCD, 922k dots
Fixed screen (not touch-sensitive) Fixed screen (not touch-sensitive)
11 shutter flaps per second 3 shutter flaps per second
Lens stabilization onlyIn-body stabilization
Weathersealed bodyWeathersealed body
3020 shots per battery charge880 shots per battery charge
160 x 157 x 91 mm, 1350 g 156 x 117 x 82 mm, 895 g

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D4S and the Sony Alpha A850? 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 Nikon D4S and the Sony A850 is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.

Size Nikon D4S vs Sony A850
Compare D4S versus A850 top
Comparison D4S or A850 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A850 is notably smaller (27 percent) than the Nikon D4S. Moreover, the A850 is markedly lighter (34 percent) than the D4S. 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 D4S gets 3020 shots out of its EN-EL18a battery, while the A850 can take 880 images on a single charge of its NP-FM500H power pack. As can be seen in the images above, the D4S has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power. In order to provide similar functionality for the A850, Sony provides the VG-C90AM vertical grip as an optional accessory (see here on eBay).

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. 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.

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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
 
Nikon D4S 160 mm 157 mm 91 mm 1350 g 3020 Y Feb 2014 6,499i
 
Sony A850 156 mm 117 mm 82 mm 895 g 880 Y Aug 2009 1,999i
 
Canon 1D X 158 mm 168 mm 83 mm 1551 g 1120 Y Oct 2011 6,799i
 
Nikon D5 160 mm 159 mm 92 mm 1415 g 3780 Y Jan 2016 6,499i
 
Nikon D750 141 mm 113 mm 78 mm 750 g 1230 Y Sep 2014 2,299i
 
Nikon D810 146 mm 123 mm 82 mm 980 g 1200 Y Jun 2014 3,299i
 
Nikon Df 144 mm 110 mm 67 mm 760 g 1400 Y Nov 2013 2,749i
 
Nikon D610 141 mm 113 mm 82 mm 850 g 900 Y Oct 2013 1,999 i
 
Nikon D4 160 mm 157 mm 91 mm 1340 g 2600 Y Jan 2012 5,999i
 
Nikon D3S 160 mm 157 mm 88 mm 1240 g 4200 Y Oct 2009 5,199i
 
Nikon D3X 160 mm 157 mm 88 mm 1260 g 4400 Y Dec 2008 7,999i
 
Nikon D3 160 mm 157 mm 88 mm 1300 g 4300 Y Aug 2007 4,999i
 
Sony A99 II 143 mm 104 mm 76 mm 849 g 490 Y Sep 2016 3,199 i
 
Sony A7 II 127 mm 96 mm 60 mm 599 g 350 Y Nov 2014 1,999i
 
Sony A99 147 mm 111 mm 78 mm 812 g 500 Y Sep 2012 2,799i
 
Sony A77 143 mm 104 mm 81 mm 732 g 470 Y Aug 2011 1,399i
 
Sony A900 156 mm 117 mm 82 mm 895 g 880 Y Sep 2008 2,999i
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 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 A850 was launched at a markedly lower price (by 69 percent) than the D4S, which puts it into a different market segment. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

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. 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.

Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. They nevertheless have the same format factor of 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Nikon D4S and Sony A850 sensor measures

With 24.4MP, the A850 offers a higher resolution than the D4S (16.2MP), but the A850 has smaller individual pixels (pixel pitch of 5.94μm versus 7.29μm for the D4S). Yet, the D4S is a much more recent model (by 4 years and 6 months) than the A850, and its sensor will have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units.

The resolution advantage of the Sony A850 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A850 for good quality output (200 dots per inch) amounts to 30.2 x 20.2 inches or 76.8 x 51.2 cm, for very good quality (250 dpi) 24.2 x 16.1 inches or 61.4 x 41 cm, and for excellent quality (300 dpi) 20.2 x 13.4 inches or 51.2 x 34.1 cm. The corresponding values for the Nikon D4S are 24.6 x 16.4 inches or 62.6 x 41.7 cm for good quality, 19.7 x 13.1 inches or 50.1 x 33.3 cm for very good quality, and 16.4 x 10.9 inches or 41.7 x 27.8 cm for excellent quality prints.

The Nikon D4S has a native sensitivity range from ISO 100 to ISO 25600, which can be extended to ISO 50-409600. The corresponding ISO settings for the Sony Alpha A850 are ISO 200 to ISO 3200, with the possibility to increase the ISO range to 100-6400.

D4S versus A850 MP

Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). Of the two cameras under review, the D4S has a notably higher overall DXO score than the A850 (overall score 10 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.6 bits higher color depth, 1.1 EV in additional dynamic range, and 1.1 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
 
Nikon D4S Full Frame 16.2 4928 32801080/60p24.413.3307489
 
Sony A850 Full Frame 24.4 6048 4032none23.812.2141579
 
Canon 1D X Full Frame 17.9 5184 34561080/30p23.811.8278682
 
Nikon D5 Full Frame 20.7 5588 37124K/30p25.112.3234388
 
Nikon D750 Full Frame 24.2 6016 40161080/60p24.814.5295693
 
Nikon D810 Full Frame 36.2 7360 49121080/60p25.714.8285397
 
Nikon Df Full Frame 16.2 4928 3280none24.613.1327989
 
Nikon D610 Full Frame 24.2 6016 40161080/30p25.114.4292594
 
Nikon D4 Full Frame 16.2 4928 32801080/30p24.713.1296589
 
Nikon D3S Full Frame 12.1 4256 2832720/24p23.512.0325382
 
Nikon D3X Full Frame 24.4 6048 4032none24.713.7199288
 
Nikon D3 Full Frame 12.1 4256 2832none23.512.2229081
 
Sony A99 II Full Frame 42.2 7952 53044K/30p25.413.4231792
 
Sony A7 II Full Frame 24.0 6000 40001080/60p24.913.6244990
 
Sony A99 Full Frame 24.0 6000 40001080/60p25.014.0155589
 
Sony A77 APS-C 24.0 6000 40001080/60p24.013.280178
 
Sony A900 Full Frame 24.4 6048 4032none23.712.3143179

Many modern cameras are not only capable of taking still images, but can also record movies. The D4S indeed provides movie recording capabilities, while the A850 does not. The highest resolution format that the D4S can use is 1080/60p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The D4S and the A850 are similar in the sense that both have an optical viewfinder. The latter is useful for getting a clear image for framing even in brightly lit environments. The viewfinder in the D4S offers a wider field of view (100%) than the one in the A850 (98%), so that a larger proportion of the captured image is visible in the finder. On the other hand, the viewfinder of the A850 has a higher magnification (0.74x vs 0.70x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Nikon D4S and Sony A850 along with similar information for a selection of comparators.

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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
 
Nikon D4Soptical Y 3.2 921 fixed n 1/8000s 11.0 n n
 
Sony A850optical Y 3.0 922 fixed n 1/8000s 3.0 n Y
 
Canon 1D Xoptical Y 3.2 1040 fixed n 1/8000s 14.0 n n
 
Nikon D5optical Y 3.2 2359 fixed Y 1/8000s 14.0 n n
 
Nikon D750optical Y 3.2 1229 tilting n 1/4000s 6.0 Y n
 
Nikon D810optical Y 3.2 1229 fixed n 1/8000s 5.0 Y n
 
Nikon Dfoptical Y 3.2 921 fixed n 1/4000s 5.5 n n
 
Nikon D610optical Y 3.2 921 fixed n 1/4000s 6.0 Y n
 
Nikon D4optical Y 3.2 921 fixed n 1/8000s 11.0 n n
 
Nikon D3Soptical Y 3.0 921 fixed n 1/8000s 11.0 n n
 
Nikon D3Xoptical Y 3.0 922 fixed n 1/8000s 5.0 n n
 
Nikon D3optical Y 3.0 922 fixed n 1/8000s 11.0 n n
 
Sony A99 II2400 Y 3.0 1229 full-flex n 1/8000s 12.0 n Y
 
Sony A7 II2400 n 3.0 1230 tilting n 1/8000s 5.0 n Y
 
Sony A992359 Y 3.0 1229 full-flex n 1/8000s 6.0 n Y
 
Sony A772359 Y 3.0 921 full-flex n 1/8000s 12.0 Y Y
 
Sony A900optical Y 3.0 922 fixed n 1/8000s 5.0 n Y

One feature that differentiates the A850 and the D4S is in-body image stabilization (IBIS). The A850 reduces the risk of handshake-induced blur with all attached lenses, while the D4S offers no blur reduction with lenses that themselves do not provide optical image stabilization.

The Nikon D4S 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 D4S writes its imaging data to Compact Flash or XQD cards, while the A850 uses Compact Flash or Memory Stick PRO Duo cards. Both cameras feature dual card slots, which can be very useful in case a memory card fails.

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 Nikon D4S and Sony Alpha A850 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
 
Nikon D4SYmonomonoYYmini2.0---
 
Sony A850Y----mini2.0---
 
Canon 1D XYmono-Y-mini2.0---
 
Nikon D5YstereomonoYYmini3.0---
 
Nikon D750YstereomonoYYmini2.0Y--
 
Nikon D810YstereomonoYYmini3.0Y--
 
Nikon DfY----mini2.0---
 
Nikon D610YmonomonoYYmini2.0---
 
Nikon D4YmonomonoYYmicro2.0---
 
Nikon D3SYstereo---mini2.0---
 
Nikon D3XY----mini2.0---
 
Nikon D3Y----mini2.0---
 
Sony A99 IIYstereomonoYYmicro2.0YYY
 
Sony A7 IIYstereomonoYYmicro2.0YY-
 
Sony A99YstereomonoYYmini2.0---
 
Sony A77YstereomonoY-mini2.0---
 
Sony A900Y----mini2.0---

Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.

Both the D4S and the A850 have been discontinued, but can regularly be found used on eBay. The D4S was replaced by the Nikon D5, while the A850 does not have a direct successor. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Nikon and Sony websites.

Review summary

So what conclusions can be drawn? Is there a clear favorite between the Nikon D4S and the Sony A850? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Reasons to prefer the Nikon D4S:

  • Better image quality: Scores markedly higher (10 points) in the DXO overall assessment.
  • More dynamic range: Captures a larger spectrum of light and dark details (1.1 EV of extra DR).
  • Better low-light sensitivity: Requires less light for good images (1.1 stops ISO advantage).
  • Broader imaging potential: Can record not only still images but also 1080/60p movies.
  • More complete view: Has a viewfinder with a larger field of view (100% vs 98%).
  • Larger screen: Has a bigger rear LCD (3.2" vs 3.0") for image review and settings control.
  • Faster burst: Shoots at higher frequency (11 vs 3 flaps/sec) to capture the decisive moment.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
  • Longer lasting: Can take more shots (3020 versus 880) on a single battery charge.
  • More modern: Reflects 4 years and 6 months of technical progress since the A850 launch.

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Arguments in favor of the Sony Alpha A850:

  • More detail: Has more megapixels (24.4 vs 16.2MP), which boosts linear resolution by 23%.
  • Larger viewfinder image: Features a viewfinder with a higher magnification (0.74x vs 0.70x).
  • More compact: Is smaller (156x117mm vs 160x157mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 455g or 34 percent) and is thus easier to take along.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • More affordable: Was introduced into a lower priced category (69 percent cheaper at launch).
  • More heavily discounted: Has been around for much longer (launched in August 2009).

If the count of individual advantages (bullet points above) is taken as a guide, the D4S is the clear winner of the match-up (11 : 7 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 wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

D4S 11:07 A850

How about other alternatives? Do the specifications of the Nikon D4S and the Sony A850 place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing 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 D4S or the A850. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is why hands-on reviews by experts 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
 
Nikon D4S....4.5/55/54.5/5 Feb 2014 6,499i
 
Sony A850..75/100..4/54.5/5 Aug 2009 1,999i
 
Canon 1D X....4.5/54.5/54.5/5 Oct 2011 6,799i
 
Nikon D5..89/1004.5/55/55/5 Jan 2016 6,499i
 
Nikon D750+ +90/1004.5/55/54.5/5 Sep 2014 2,299i
 
Nikon D810..86/1005/54.5/54.5/5 Jun 2014 3,299i
 
Nikon Df..81/1004/54/54/5 Nov 2013 2,749i
 
Nikon D610+ +87/1004.5/54.5/54.5/5 Oct 2013 1,999 i
 
Nikon D4....4.5/5..4.5/5 Jan 2012 5,999i
 
Nikon D3S..89/1004.5/55/55/5 Oct 2009 5,199i
 
Nikon D3X..86/1004/55/55/5 Dec 2008 7,999i
 
Nikon D3..+ +5/5o4.5/5 Aug 2007 4,999i
 
Sony A99 II..85/1004.5/54.5/54.5/5 Sep 2016 3,199 i
 
Sony A7 II+82/1004.5/55/55/5 Nov 2014 1,999i
 
Sony A99..84/1004.5/5o4.5/5 Sep 2012 2,799i
 
Sony A7791/10081/100..4.5/55/5 Aug 2011 1,399i
 
Sony A900+ ++ +4.5/54/55/5 Sep 2008 2,999i
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. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Nikon D4S:
Check Ebay offers
Sony A850:
Check Ebay offers

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. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

~

    Specifications: Nikon D4S vs Sony A850

    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 Nikon D4S Sony A850
    Camera Type Digital single lens reflex Digital single lens reflex
    Camera Lens Nikon F mount lenses Sony A mount lenses
    Launch Date February 2014 August 2009
    Launch Price USD 6,499 USD 1,999
    Sensor Specs Nikon D4S Sony A850
    Sensor Technology CMOS CMOS
    Sensor Format Full Frame Sensor Full Frame Sensor
    Sensor Size 36.0 x 23.9 mm 35.9 x 24.0 mm
    Sensor Area 860.4 mm2 861.6 mm2
    Sensor Diagonal 43.2 mm 43.2 mm
    Crop Factor 1.0x 1.0x
    Sensor Resolution 16.2 Megapixels 24.4 Megapixels
    Image Resolution 4928 x 3280 pixels 6048 x 4032 pixels
    Pixel Pitch 7.29 μm 5.94 μm
    Pixel Density 1.88 MP/cm2 2.83 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability 1080/60p Video no Video
    ISO Setting 100 - 25,600 ISO 200 - 3,200 ISO
    ISO Boost 50 - 409,600 ISO 100 - 6,400 ISO
    Image Processor EXPEED 4 BIONZ
    DXO Sensor Quality (score) 89 79
    DXO Color Depth (bits) 24.4 23.8
    DXO Dynamic Range (EV) 13.3 12.2
    DXO Low Light (ISO) 3074 1415
    Screen Specs Nikon D4S Sony A850
    Viewfinder Type Optical viewfinder Optical viewfinder
    Viewfinder Field of View 100% 98%
    Viewfinder Magnification 0.70x 0.74x
    Top-Level Screen Control Panel Control Panel
    LCD Framing Live View
    Rear LCD Size 3.2inch 3.0inch
    LCD Resolution 921k dots 922k dots
    LCD Attachment Fixed screen Fixed screen
    Shooting Specs Nikon D4S Sony A850
    Focus System Phase-detect AF Phase-detect AF
    Continuous Shooting 11 shutter flaps/s 3 shutter flaps/s
    Time-Lapse PhotographyIntervalometer built-inno Intervalometer
    Image StabilizationLens stabilization onlyIn-body stabilization
    Fill Flash no On-Board Flash no On-Board Flash
    Storage Medium CF or XQD cards CF or MS cards
    Second Storage Option Dual card slots Dual card slots
    Connectivity Specs Nikon D4S Sony A850
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket PC Sync socket
    USB Connector USB 2.0 USB 2.0
    HDMI Port mini HDMI mini HDMI
    Microphone Port External MIC port no MIC socket
    Headphone Socket Headphone port no Headphone port
    Wifi Support no Wifi no Wifi
    Body Specs Nikon D4S Sony A850
    Environmental SealingWeathersealed bodyWeathersealed body
    Battery Type EN-EL18a NP-FM500H
    Battery Life (CIPA)3020 shots per charge880 shots per charge
    Body Dimensions 160 x 157 x 91 mm
    (6.3 x 6.2 x 3.6 in)
    156 x 117 x 82 mm
    (6.1 x 4.6 x 3.2 in)
    Camera Weight 1350 g (47.6 oz) 895 g (31.6 oz)

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