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Fujifilm X100 versus Sony A99

The Fujifilm FinePix X100 and the Sony Alpha SLT-A99 are two digital cameras that were officially introduced, respectively, in September 2010 and September 2012. The X100 is a fixed lens compact, while the A99 is a DSLR. The cameras are based on an APS-C (X100) and a full frame sensor. The Fujifilm has a resolution of 12.2 megapixel, whereas the Sony provides 24 MP.

Body comparison

An illustration of the physical size and weight of the Fujifilm X100 and the Sony A99 is provided in the side-by-side display below. Three consecutive perspectives from the front, the top, and the back are presented. All size dimensions are rounded to the nearest millimeter. If you prefer, you can also use the toggle button to switch to a comparison in percentage terms (in this case, the camera on the left side – the X100 – represents the basis for the calculations across all the size and weight measures).

Fujifilm X100 vs Sony A99 front
X100 versus A99 top view
X100 and A99 rear side
Body view (X100 on the left)

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A99 is considerably larger (73 percent) than the Fujifilm X100. It is noteworthy in this context that the A99 is splash and dust-proof, while the X100 does not feature any corresponding weather-sealing.

The above size and weight comparisons are to some extent incomplete and possibly misleading, as the X100 has a lens build in, whereas the A99 is an interchangeable lens camera that requires a separate lens. Attaching the latter will add extra weight and bulk to the setup.

The table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you want to switch the focus of the display and review another camera pair, just select a new right or left comparator from among the camera models in the table. Alternatively, you can also move across to the CAM-parator tool and choose from the broad selection of possible comparisons there.

Camera Body Specifications
Camera Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
(CIPA)
Weather
Sealing
(y/n)
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Fujifilm X100 (⇒ rgt) 126 mm 75 mm 54 mm 445 g 300 no 2010 1,199discont. check
Sony A99 (⇒ lft) 147 mm 111 mm 78 mm 812 g 500 YES 2012 2,799discont. check
Canon G1 X (⇒ lft | rgt) 117 mm 81 mm 65 mm 534 g 250 no 2012 799discont. check
Canon 1100D (⇒ lft | rgt) 130 mm 100 mm 78 mm 495 g 700 no 2011 449discont. check
Fujifilm X30 (⇒ lft | rgt) 119 mm 72 mm 60 mm 423 g 470 no 2014 599 latest check
Fujifilm X100S (⇒ lft | rgt) 127 mm 74 mm 54 mm 445 g 330 no 2013 1,299discont. check
Fujifilm X10 (⇒ lft | rgt) 117 mm 70 mm 57 mm 350 g 270 no 2011 599discont. check
Leica D-LUX Typ 109 (⇒ lft | rgt) 118 mm 66 mm 55 mm 405 g 300 no 2014 1,195 latest check
Nikon D3100 (⇒ lft | rgt) 124 mm 96 mm 75 mm 505 g 550 no 2010 599discont. check
Nikon D3000 (⇒ lft | rgt) 126 mm 97 mm 64 mm 536 g 500 no 2009 599discont. check
Panasonic LX100 (⇒ lft | rgt) 115 mm 66 mm 55 mm 393 g 300 no 2014 899 latest check
Panasonic GH1 (⇒ lft | rgt) 124 mm 90 mm 45 mm 385 g .. no 2009 1,499discont. check
Pentax K-3 (⇒ lft | rgt) 131 mm 100 mm 77 mm 800 g 560 YES 2013 1,299discont. check
Sony A9 (⇒ lft | rgt) 127 mm 96 mm 63 mm 673 g 650 YES 2017 4,499 latest check
Sony A99 II (⇒ lft | rgt) 143 mm 104 mm 76 mm 849 g 490 YES 2016 3,199 latest check
Sony A77 (⇒ lft | rgt) 143 mm 104 mm 81 mm 732 g 470 YES 2011 1,999discont. check
Sony A900 (⇒ lft | rgt) 156 mm 117 mm 82 mm 895 g 880 YES 2008 2,999discont. check

The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The X100 was launched at a lower price than the A99, despite having a lens build 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. 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 imaging sensor is a crucial determinant 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. 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 Fujifilm X100 features an APS-C sensor and the Sony A99 a full frame sensor. The sensor area in the A99 is 128 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Fujifilm X100 and Sony A99 sensor measures
Sensor size

With 24MP, the A99 offers a higher resolution than the X100 (12.2MP), but the A99 nevertheless has larger individual pixels (pixel pitch of 5.96μm versus 5.53μm for the X100) due to its larger sensor. Moreover, the A99 is a somewhat more recent model (by 1 year and 11 months) than the X100, and its sensor might have benefitted from technological advances during this time that further enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the X100 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

X100 versus A99 MP
Sensor resolution

For most cameras, data on sensor performance has been reported by DXO Mark. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). Of the two cameras under consideration, the A99 offers substantially better image quality than the X100 (overall score 16 points higher). The advantage is based on 2.1 bits higher color depth, 1.6 EV in additional dynamic range, and 0.6 stops in additional low light sensitivity. The table below summarizes the physical sensor characteristics and sensor quality findings and compares them across a set of similar cameras.

Sensor Characteristics
Camera Sensor
Class
Resolution
(Megapixel)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
Fujifilm X100 (⇒ rgt) APS-C 12.2 4288 2848 720/30p 22.9 12.4 1001 73
Sony A99 (⇒ lft) Full Frame 24.0 6000 4000 1080/60p 25.0 14.0 1555 89
Canon G1 X (⇒ lft | rgt) 1.5-inch 14.2 4352 3264 1080/24p 21.7 10.8 644 60
Canon 1100D (⇒ lft | rgt) APS-C 12.2 4272 2848 720/30p 21.9 11.0 755 62
Fujifilm X30 (⇒ lft | rgt) 2/3 12.0 4000 3000 1080/60p - - - -
Fujifilm X100S (⇒ lft | rgt) APS-C 16.0 4896 3264 1080/60p - - - -
Fujifilm X10 (⇒ lft | rgt) 2/3 12.0 4000 3000 1080/30p 20.5 11.3 245 50
Leica D-LUX Typ 109 (⇒ lft | rgt) Four Thirds 12.7 4112 3088 4K/30p - - - -
Nikon D3100 (⇒ lft | rgt) APS-C 14.2 4608 3072 1080/24p 22.5 11.3 919 67
Nikon D3000 (⇒ lft | rgt) APS-C 10.0 3872 2592 no 22.3 11.1 563 62
Panasonic LX100 (⇒ lft | rgt) Four Thirds 12.7 4112 3088 4K/30p 22.3 12.5 553 67
Panasonic GH1 (⇒ lft | rgt) Four Thirds 12.0 4000 3000 1080/24p 21.6 11.6 772 64
Pentax K-3 (⇒ lft | rgt) APS-C 24.1 6016 4000 1080/60i 23.7 13.4 1216 80
Sony A9 (⇒ lft | rgt) Full Frame 24.0 6000 4000 4K/30p 24.9 13.3 3517 92
Sony A99 II (⇒ lft | rgt) Full Frame 42.2 7952 5304 4K/30p 25.4 13.4 2317 92
Sony A77 (⇒ lft | rgt) APS-C 24.0 6000 4000 1080/60p 24 13.2 801 78
Sony A900 (⇒ lft | rgt) Full Frame 24.4 6048 4032 no 23.7 12.3 1431 79

Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration are equipped with sensors that have a sufficiently high read-out speed for moving images, but the A99 provides a better video resolution than the X100. It can shoot movie footage at 1080/60p, while the Fujifilm is limited to 720/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. The two cameras under review are similar with respect to both having an electronic viewfinder. However, the one in the A99 offers a substantially higher resolution than the one in the X100 (2359k vs 1440k dots). The adjacent table lists some of the other core features of the Fujifilm X100 and Sony A99 along with similar information for a selection of comparators. The full specs-sheets can be found in the camera manual or, for example, in the dpreview camera hub.

Core Features
Camera Viewfinder
(Type or
'000 dots)
Control
Panel
(Y/n)
LCD
Size
(inch)
LCD
Resolution
('000 dots)
LCD
Attach-
ment
Touch
Screen
(Y/n)
Shutter
speed
(1/sec)
Shutter
flaps
(1/sec))
Build-in
Flash
(GN)
Build-in
Image
Stab
Fujifilm X100 (⇒ rgt) 1440 no 2.8 460 fixed no 4000 5.0 9 no
Sony A99 (⇒ lft) 2359 YES 3.0 1229 full-flex no 8000 6.0 no YES
Canon G1 X (⇒ lft | rgt) optical no 3.0 922 Swivel no 4000 1.9 7 YES
Canon 1100D (⇒ lft | rgt) optical no 2.7 230 fixed no 4000 3.0 9.2 no
Fujifilm X30 (⇒ lft | rgt) 2360 no 3.0 920 tilting no 4000 12.0 7 ..
Fujifilm X100S (⇒ lft | rgt) 2360 no 2.8 460 fixed no 4000 6.0 9 no
Fujifilm X10 (⇒ lft | rgt) optical no 2.8 460 fixed no 4000 10.0 9 YES
Leica D-LUX Typ 109 (⇒ lft | rgt) 2764 no 3.0 921 fixed no 4000 11.0 no YES
Nikon D3100 (⇒ lft | rgt) optical no 3.0 230 fixed no 4000 3.0 12 no
Nikon D3000 (⇒ lft | rgt) optical no 3.0 230 fixed no 4000 3.0 12 no
Panasonic LX100 (⇒ lft | rgt) 2764 no 3.0 921 fixed no 4000 11.0 7 YES
Panasonic GH1 (⇒ lft | rgt) 1440 no 3.0 460 swivel no 4000 3.0 10.5 no
Pentax K-3 (⇒ lft | rgt) optical YES 3.2 1037 fixed no 8000 8.3 13 YES
Sony A9 (⇒ lft | rgt) 3686 no 3.0 1440 tilting YES 8000 20.0 no YES
Sony A99 II (⇒ lft | rgt) 2400 YES 3.0 1229 tilting no 8000 12.0 no YES
Sony A77 (⇒ lft | rgt) 2359 YES 3.0 921 full-flex no 8000 12.0 12 YES
Sony A900 (⇒ lft | rgt) optical YES 3.0 922 fixed no 8000 5.0 no YES

Both the X100 and the A99 have been discontinued, but can regularly be found used on ebay. The X100 was replaced by the Fujifilm X100S, while the A99 was followed by the Sony A99 II.

Summary

So what is the bottom line? Is the Fujifilm X100 better than the Sony A99 or vice versa? Below is a summary of the relative strengths of each of the two contestants.


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Arguments in favor of the Fujifilm FinePix X100:

  • Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
  • Ready to shoot: Comes with a build-in lens, while the A99 requires a separate lens.
  • More compact: Is smaller (126x75mm vs 147x111mm) and thus needs less room in the bag.
  • Less heavy: Is lighter even though it comes with a build-in lens (unlike the A99).
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • More affordable: Was introduced at a lower price, despite coming with a build-in lens.
  • More heavily discounted: Has been on the market for longer (launched in September 2010).

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Advantages of the Sony Alpha SLT-A99:

  • More detail: Has more megapixels (24 vs 12.2MP), which boosts linear resolution by 40%.
  • Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
  • Better image quality: Scores substantially higher (16 points) in the DXO overall evaluation.
  • Richer colors: Generates noticeably more natural colors (2.1 bits more color depth).
  • More dynamic range: Captures a broader range of light and dark details (1.6 EV of extra DR).
  • Better low-light sensitivity: Can shoot in dim conditions (0.6 stops ISO advantage).
  • Better video: Provides higher definition movie capture (1080/60p vs 720/30p).
  • More detailed viewfinder: Has higher resolution electronic viewfinder (2359k vs 1440k dots).
  • Easier setting verification: Has a control panel on top to check shooting parameters.
  • Larger screen: Has a bigger rear LCD (3.0" vs 2.8") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (1229k vs 460k dots).
  • More flexible LCD: Has full-flex screen for odd-angle shots in portrait or landscape orientation.
  • Faster shutter: Has higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
  • Faster burst: Shoots at higher frequency (6 vs 5 flaps/sec) to capture the decisive moment.
  • More flexible: Makes it possible to change lenses and thus to use specialty optics.
  • Longer lasting: Gets more shots (500 versus 300) out of a single battery charge.
  • Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
  • Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
  • More modern: Was introduced somewhat (1 year and 11 months) more recently.

If the number of relative strengths (bullet points above) is taken as a guide, the A99 is the clear winner of the contest (19 : 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.

X100 07:19 A99

In any case, while the specs-based evaluation of cameras is instructive in revealing their potential as photographic tools, it remains incomplete and does no justice, for example, to the way the X100 or the A99 handle or 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 table below summarizes the assessments of some of the best known camera review sites. You can find the full text of the reviews, respectively, at cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.

Review scores
Camera camera
labs
dp
review
ephoto
zine
imaging
resource
photography
blog
Camera
Launch
(year)
Launch
Price
(USD)
Street
Price
(amazon)
Used
Price
(ebay)
Fujifilm X100 (⇒ rgt) - 75/100 Silver 4/5 4/5 5/5 2010 1,199discont. check
Sony A99 (⇒ lft) - 84/100 Gold 4.5/5 reviewed 4.5/5 2012 2,799discont. check
Canon G1 X (⇒ lft | rgt) 79/100 Rec 76/100 Silver 4/5 4/5 4.5/5 2012 799discont. check
Canon 1100D (⇒ lft | rgt) 80/100 69/100 4/5 4/5 4.5/5 2011 449discont. check
Fujifilm X30 (⇒ lft | rgt) - 76/100 4.5/5 4/5 4.5/5 2014 599 latest check
Fujifilm X100S (⇒ lft | rgt) HiRec 81/100 Gold 4.5/5 4/5 5/5 2013 1,299discont. check
Fujifilm X10 (⇒ lft | rgt) - 76/100 Silver 4/5 3.5/5 4.5/5 2011 599discont. check
Leica D-LUX Typ 109 (⇒ lft | rgt) - - 4.5/5 - 4.5/5 2014 1,195 latest check
Nikon D3100 (⇒ lft | rgt) 84/100 HiRec 72/100 Silver 4.5/5 5/5 4.5/5 2010 599discont. check
Nikon D3000 (⇒ lft | rgt) 80/100 Rec 72/100 HiRec 4/5 3.5/5 4.5/5 2009 599discont. check
Panasonic LX100 (⇒ lft | rgt) HiRec 85/100 Gold 5/5 4/5 5/5 2014 899 latest check
Panasonic GH1 (⇒ lft | rgt) 89/100 HiRec 72/100 HiRec 4.5/5 5/5 4.5/5 2009 1,499discont. check
Pentax K-3 (⇒ lft | rgt) - 83/100 Gold 5/5 4.5/5 5/5 2013 1,299discont. check
Sony A9 (⇒ lft | rgt) .. 89/100 Gold 5/5 5/5 5/5 2017 4,499 latest check
Sony A99 II (⇒ lft | rgt) - 85/100 Silver 4.5/5 4.5/5 4.5/5 2016 3,199 latest check
Sony A77 (⇒ lft | rgt) 91/100 81/100 Silver - 4.5/5 5/5 2011 1,999discont. check
Sony A900 (⇒ lft | rgt) 90/100 HiRec HiRec 4.5/5 4/5 5/5 2008 2,999discont. check

The review scores listed above should be treated 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. A score, therefore, has to be seen in close connection to the price and market introduction time 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, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

Other comparisons

If you would like to see a different side-by-side camera review, just make a corresponding selection in the search boxes below. An an alternative, you can also directly jump to any one of the listed comparisons that were previously generated by the CAM-parator tool. If you do not see the camera that you are looking for, please send me an email, and I will try to locate and add the respective data to the application.

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