Canon 5D Mark II versus Sony A9
The Canon EOS 5D Mark II and the Sony Alpha A9 are two professional cameras that were officially introduced, respectively, in September 2008 and April 2017. The 5D Mark II is a DSLR, while the A9 is a mirrorless interchangeable lens camera. Both cameras are equipped with a full frame sensor. The Canon has a resolution of 21 megapixel, whereas the Sony provides 24 MP. Read on to find out how these two cameras compare with respect to their size, their sensors, their features, and their reception by expert reviewers.
Body comparison: Canon 5D Mark II vs Sony A9
The physical size and weight of the Canon 5D Mark II and the Sony A9 are illustrated in the side-by-side display below. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter. You can also use the toggle button to switch to a percentage comparison if you prefer that the measures are being expressed in relative terms (in this case, the camera on the left – the 5D Mark II – represents the basis or 100 percent across all the size and weight measures).
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A9 is notably smaller (30 percent) than the Canon 5D Mark II. Moreover, the A9 is markedly lighter (21 percent) than the 5D Mark II. 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. Both cameras have similarly sized sensors, but DSLRs have a larger flange-to-focal plane distance than mirrorless cameras, which imposes contraints on the optical engineering process and generally leads to bigger and heavier lenses. You can find an overview of optics for the two cameras in the Canon EF Lens Catalog (5D Mark II) and the Sony FE Lens Catalog (A9). Mirrorless cameras, such as the A9, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.
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 camera comparisons there.
|Camera Body Specifications
|Canon 5D Mark II (⇒ rgt)||152 mm||114 mm||75 mm||850 g||850||YES||2008||3,499||discont.||check|
|Sony A9 (⇒ lft)||127 mm||96 mm||63 mm||673 g||650||YES||2017||4,499||latest||check|
|Canon 6D Mark II (⇒ lft | rgt)||144 mm||111 mm||75 mm||765 g||1200||YES||2017||1,999||latest||check|
|Canon 5D Mark IV (⇒ lft | rgt)||151 mm||116 mm||76 mm||890 g||900||YES||2016||3,499||latest||check|
|Canon 1D X Mark II (⇒ lft | rgt)||158 mm||168 mm||83 mm||1530 g||1210||YES||2016||5,999||latest||check|
|Canon 5DS R (⇒ lft | rgt)||152 mm||116 mm||76 mm||930 g||700||YES||2015||3,699||latest||check|
|Canon 5DS (⇒ lft | rgt)||152 mm||116 mm||76 mm||930 g||700||YES||2015||3,699||latest||check|
|Canon 6D (⇒ lft | rgt)||145 mm||111 mm||71 mm||770 g||1090||YES||2012||2,099||discont.||check|
|Canon 5D Mark III (⇒ lft | rgt)||152 mm||116 mm||76 mm||950 g||950||YES||2012||3,499||discont.||check|
|Canon 7D (⇒ lft | rgt)||148 mm||111 mm||74 mm||860 g||800||YES||2009||1,699||discont.||check|
|Canon 1Ds Mark III (⇒ lft | rgt)||150 mm||160 mm||80 mm||1385 g||1800||YES||2007||7,999||discont.||check|
|Canon 5D (⇒ lft | rgt)||152 mm||113 mm||75 mm||895 g||400||YES||2005||3,299||discont.||check|
|Sony A7 III (⇒ lft | rgt)||127 mm||96 mm||74 mm||650 g||610||YES||2018||1,999||latest||check|
|Sony A7R III (⇒ lft | rgt)||127 mm||96 mm||74 mm||650 g||650||YES||2017||3,199||latest||check|
|Sony A7R II (⇒ lft | rgt)||127 mm||96 mm||60 mm||625 g||290||YES||2015||3,199||discont.||check|
|Sony A7S II (⇒ lft | rgt)||127 mm||96 mm||60 mm||627 g||370||YES||2015||2,999||latest||check|
|Sony A7 II (⇒ lft | rgt)||127 mm||96 mm||60 mm||599 g||350||YES||2014||1,999||discont.||check|
The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The 5D Mark II was launched at a somewhat lower price (by 22 percent) than the A9, which makes it more attractive for photographers on a tight budget. 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: Canon 5D Mark II vs Sony A9
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.
Both cameras under consideration feature a full frame sensor, but their sensors differ slightly in size. The sensor area in the A9 is 2 percent smaller. 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.
Despite having a slightly smaller sensor, the A9 offers a higher resolution of 24 megapixel, compared with 21 MP of the 5D Mark II. This megapixel advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 5.94μm versus 6.41μm for the 5D Mark II). However, it should be noted that the A9 is much more recent (by 8 years and 7 months) than the 5D Mark II, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.
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 A9 offers substantially better image quality than the 5D Mark II (overall score 13 points higher). The advantage is based on 1.2 bits higher color depth, 1.4 EV in additional dynamic range, and 1 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.
|Canon 5D Mark II (⇒ rgt)||Full Frame||21.0||5616||3744||1080/30p||23.7||11.9||1815||79|
|Sony A9 (⇒ lft)||Full Frame||24.0||6000||4000||4K/30p||24.9||13.3||3517||92|
|Canon 6D Mark II (⇒ lft | rgt)||Full Frame||26.0||6240||4160||1080/60p||24.4||11.9||2862||85|
|Canon 5D Mark IV (⇒ lft | rgt)||Full Frame||30.1||6720||4480||4K/30p||24.8||13.6||2995||91|
|Canon 1D X Mark II (⇒ lft | rgt)||Full Frame||20.0||5472||3648||4K/60p||24.1||13.5||3207||88|
|Canon 5DS R (⇒ lft | rgt)||Full Frame||50.3||8688||5792||1080/60p||24.6||12.4||2308||86|
|Canon 5DS (⇒ lft | rgt)||Full Frame||50.3||8688||5792||1080/60p||24.7||12.4||2381||87|
|Canon 6D (⇒ lft | rgt)||Full Frame||20.0||5472||3648||1080/30p||23.8||12.1||2340||82|
|Canon 5D Mark III (⇒ lft | rgt)||Full Frame||22.1||5760||3840||1080/30p||24||11.7||2293||81|
|Canon 7D (⇒ lft | rgt)||APS-C||17.9||5184||3456||1080/30p||22.0||11.7||854||66|
|Canon 1Ds Mark III (⇒ lft | rgt)||Full Frame||21.0||5616||3744||no||24.0||12.0||1663||80|
|Canon 5D (⇒ lft | rgt)||Full Frame||12.7||4368||2912||no||22.9||11.1||1368||71|
|Sony A7 III (⇒ lft | rgt)||Full Frame||24.0||6000||4000||4K/30p||25.0||14.7||3730||96|
|Sony A7R III (⇒ lft | rgt)||Full Frame||42.2||7952||5304||4K/30p||26.0||14.7||3523||100|
|Sony A7R II (⇒ lft | rgt)||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
|Sony A7S II (⇒ lft | rgt)||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85|
|Sony A7 II (⇒ lft | rgt)||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
Many modern cameras are not only capable of taking still images, but also of capturing video footage. The two cameras under consideration both have sensors whose read-out speed is fast enough to capture moving pictures, but the A9 provides a better video resolution than the 5D Mark II. It can shoot movie footage at 4K/30p, while the Canon is limited to 1080/30p.
Feature comparison: Canon 5D Mark II vs Sony A9
Beyond body and sensor, cameras can and do differ across a range of features. For example, the A9 has an electronic viewfinder (3686k dots), while the 5D Mark II has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The table below summarizes some of the other core capabilities of the Canon 5D Mark II and Sony A9 in connection with corresponding information for a sample of similar cameras. If needed, the dpreview camera hub, for example, contains further detail on the cameras' specs.
|Canon 5D Mark II (⇒ rgt)||optical||YES||3.0||920||fixed||no||8000||3.9||no||no|
|Sony A9 (⇒ lft)||3686||no||3.0||1440||tilting||YES||8000||20.0||no||YES|
|Canon 6D Mark II (⇒ lft | rgt)||optical||YES||3.0||1040||swivel||YES||4000||6.5||no||no|
|Canon 5D Mark IV (⇒ lft | rgt)||optical||YES||3.2||1620||fixed||YES||8000||7.0||no||no|
|Canon 1D X Mark II (⇒ lft | rgt)||optical||YES||3.2||1620||fixed||YES||8000||16.0||no||no|
|Canon 5DS R (⇒ lft | rgt)||optical||YES||3.2||1040||fixed||no||8000||5.0||no||no|
|Canon 5DS (⇒ lft | rgt)||optical||YES||3.2||1040||fixed||no||8000||5.0||no||no|
|Canon 6D (⇒ lft | rgt)||optical||YES||3.0||1040||fixed||no||4000||4.5||no||no|
|Canon 5D Mark III (⇒ lft | rgt)||optical||YES||3.2||1040||fixed||no||8000||6.0||no||no|
|Canon 7D (⇒ lft | rgt)||optical||YES||3.0||920||fixed||no||8000||8.0||12||no|
|Canon 1Ds Mark III (⇒ lft | rgt)||optical||YES||3.0||230||fixed||no||8000||5.0||no||no|
|Canon 5D (⇒ lft | rgt)||optical||YES||2.5||230||fixed||no||8000||3.0||no||no|
|Sony A7 III (⇒ lft | rgt)||2359||no||3.0||922||tilting||YES||8000||10||no||YES|
|Sony A7R III (⇒ lft | rgt)||3686||no||3.0||1440||tilting||YES||8000||10.0||no||YES|
|Sony A7R II (⇒ lft | rgt)||2400||no||3.0||1229||tilting||no||8000||5.0||no||YES|
|Sony A7S II (⇒ lft | rgt)||2400||no||3.0||1229||tilting||no||8000||5.0||no||YES|
|Sony A7 II (⇒ lft | rgt)||2400||no||3.0||1230||tilting||no||8000||5.0||no||YES|
The A9 is a current model that online retailers, such as amazon, will have in stock. In contrast, the 5D Mark II has been discontinued (but it can be found pre-owned on eBay). As a replacement in the same line of cameras, the 5D Mark II was succeeded by the Canon 5D Mark III.
Review summary: Canon 5D Mark II vs Sony A9
So how do things add up? Is there a clear favorite between the Canon 5D Mark II and the Sony A9? A synthesis of the relative strong points of each of the models is listed below.
Advantages of the Canon EOS 5D Mark II:
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- Easier setting verification: Has an LCD display on top to control shooting parameters.
- Longer lasting: Can take more shots (850 versus 650) on a single battery charge.
- More affordable: Was introduced into a lower priced segment (22 percent cheaper at launch).
- More heavily discounted: Has been available for much longer (launched in September 2008).
Reasons to prefer the Sony Alpha A9:
- More detail: Has more megapixels (24 vs 21MP), which boosts linear resolution by 7%.
- Better image quality: Scores substantially higher (13 points) in the DXO overall evaluation.
- Richer colors: Generates noticeably more natural colors (1.2 bits more color depth).
- More dynamic range: Captures a broader range of light and dark details (1.4 EV of extra DR).
- Better low-light sensitivity: Can shoot in dim conditions (1 stops ISO advantage).
- Better video: Provides higher definition movie capture (4K/30p vs 1080/30p).
- More framing info: Has an electronic viewfinder that displays shooting data.
- More detailed LCD: Has a higher resolution rear screen (1440k vs 920k dots).
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
- Faster burst: Shoots at higher frequency (20 vs 3.9 flaps/sec) to capture the decisive moment.
- More compact: Is smaller (127x96mm vs 152x114mm) and will fit more readily into a bag.
- Less heavy: Has a lower weight (by 177g or 21 percent) and is thus easier to take along.
- More legacy lens friendly: Can use many non-native lenses via adapters.
- Sharper images: Has stabilization technology build-in to reduce the impact of hand-shake.
- More modern: Reflects 8 years and 7 months of technical progress since the 5D Mark II launch.
If the count of relative strengths (bullet points above) is taken as a measure, the A9 is the clear winner of the contest (16 : 5 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.
In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it says nothing about, for example, the handling, responsiveness, and overall imaging quality of the 5D Mark II and the A9 in practical situations. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate. This is where reviews by experts come in. The following table reports the overall rankings of the cameras as published by some of the major camera review sites. The detailed reviews can be accessed, respectively, on the websites of cameralabs.com, dpreview.com, ephotozine.com, imaging-resource.com, and photographyblog.com.
|Canon 5D Mark II (⇒ rgt)||91/100||79/100 HiRec||4/5||5/5||-||2008||3,499||discont.||check|
|Sony A9 (⇒ lft)||HiRec||89/100 Gold||5/5||5/5||5/5||2017||4,499||latest||check|
|Canon 6D Mark II (⇒ lft | rgt)||Rec||80/100||4.5/5||4/5||4/5||2017||1,999||latest||check|
|Canon 5D Mark IV (⇒ lft | rgt)||HiRec||87/100 Gold||4.5/5||5/5||4.5/5||2016||3,499||latest||check|
|Canon 1D X Mark II (⇒ lft | rgt)||-||89/100 Gold||4.5/5||5/5||4.5/5||2016||5,999||latest||check|
|Canon 5DS R (⇒ lft | rgt)||Rec||83/100 Silver||5/5||5/5||4.5/5||2015||3,699||latest||check|
|Canon 5DS (⇒ lft | rgt)||Rec||83/100 Silver||4.5/5||5/5||4.5/5||2015||3,699||latest||check|
|Canon 6D (⇒ lft | rgt)||HiRec||83/100 Silver||4.5/5||4.5/5||4.5/5||2012||2,099||discont.||check|
|Canon 5D Mark III (⇒ lft | rgt)||HiRec||82/100 Gold||4.5/5||5/5||4.5/5||2012||3,499||discont.||check|
|Canon 7D (⇒ lft | rgt)||93/100 HiRec||84/100||4.5/5||5/5||4.5/5||2009||1,699||discont.||check|
|Canon 1Ds Mark III (⇒ lft | rgt)||-||HiRec||4.5/5||-||-||2007||7,999||discont.||check|
|Canon 5D (⇒ lft | rgt)||88/100||HiRec||reviewed||reviewed||-||2005||3,299||discont.||check|
|Sony A7 III (⇒ lft | rgt)||HiRec||89/100 Gold||5/5||..||5/5||2018||1,999||latest||check|
|Sony A7R III (⇒ lft | rgt)||HiRec||90/100 Gold||4.5/5||5/5||5/5||2017||3,199||latest||check|
|Sony A7R II (⇒ lft | rgt)||HiRec||90/100 Gold||5/5||4.5/5||5/5||2015||3,199||discont.||check|
|Sony A7S II (⇒ lft | rgt)||Rec||-||4.5/5||5/5||5/5||2015||2,999||latest||check|
|Sony A7 II (⇒ lft | rgt)||Rec||82/100 Silver||4.5/5||5/5||5/5||2014||1,999||discont.||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, please note that some of the review sites have changed their methodology and reporting over time.
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