Pentax 645Z versus Canon 5DS
The Pentax 645Z and the Canon EOS 5DS are two digital cameras that were officially introduced, respectively, in April 2014 and February 2015. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a medium format (645Z) and a full frame sensor. The Pentax has a resolution of 51.1 megapixel, whereas the Canon provides 50.3 MP.
The physical size and weight of the Pentax 645Z and the Canon 5DS are illustrated in the side-by-side display below. Three successive views from the front, the top, and the rear are shown. All size dimensions 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 645Z – 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 Canon 5DS is somewhat smaller (3 percent) than the Pentax 645Z. Moreover, the 5DS is substantially lighter (40 percent) than the 645Z. Cameras that are aimed at professionals or semi-pros tend to be a bit bulkier in order to give them the necessary environmental and shock resistance. 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 the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.
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
|Pentax 645Z (⇒ rgt)||6.1 in||4.6 in||4.8 in||54.7 oz||650||YES||2014||8,499||latest||check|
|Canon 5DS (⇒ lft)||6.0 in||4.6 in||3.0 in||32.8 oz||700||YES||2015||3,699||latest||check|
|Canon 5D Mark IV (⇒ lft | rgt)||5.9 in||4.6 in||3.0 in||31.4 oz||900||YES||2016||3,499||latest||check|
|Canon 1D X Mark II (⇒ lft | rgt)||6.2 in||6.6 in||3.3 in||54.0 oz||1210||YES||2016||5,999||latest||check|
|Canon 5DS R (⇒ lft | rgt)||6.0 in||4.6 in||3.0 in||32.8 oz||700||YES||2015||3,699||latest||check|
|Canon 5D Mark III (⇒ lft | rgt)||6.0 in||4.6 in||3.0 in||33.5 oz||950||YES||2012||3,499||discont.||check|
|Canon 5D Mark II (⇒ lft | rgt)||6.0 in||4.5 in||3.0 in||30.0 oz||850||YES||2008||3,499||discont.||check|
|Fujifilm GFX 50S (⇒ lft | rgt)||5.8 in||3.7 in||3.6 in||26.1 oz||400||YES||2016||6,499||latest||check|
|Hasselblad X1D (⇒ lft | rgt)||5.9 in||3.9 in||2.8 in||25.6 oz||..||YES||2016||8,995||latest||check|
|Leica SL (⇒ lft | rgt)||5.8 in||4.1 in||1.5 in||29.9 oz||400||YES||2015||7,450||latest||check|
|Nikon D850 (⇒ lft | rgt)||5.7 in||4.9 in||3.1 in||35.5 oz||1840||YES||2017||3,299||latest||check|
|Nikon D7200 (⇒ lft | rgt)||5.4 in||4.2 in||3.0 in||27.0 oz||1110||YES||2015||1,199||discont.||check|
|Pentax 645D (⇒ lft | rgt)||6.1 in||4.6 in||4.7 in||52.2 oz||..||YES||2010||9,995||discont.||check|
|Sony A7R II (⇒ lft | rgt)||5.0 in||3.8 in||2.4 in||22.0 oz||290||YES||2015||3,199||discont.||check|
|Sony RX10 II (⇒ lft | rgt)||5.1 in||3.5 in||4.0 in||28.7 oz||400||YES||2015||1,299||discont.||check|
The listed prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The 5DS was launched at a markedly lower price (by 56 percent) than the 645Z, 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.
The size of the imaging sensor is a crucial determinant 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. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the 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 Pentax 645Z features a medium format sensor and the Canon 5DS a full frame sensor. The sensor area in the 5DS is 40 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 0.79 and 1.0. The sensor in the 645Z has a native 4:3 aspect ratio, while the one in the 5DS offers a 3:2 aspect.
With 51.1MP, the 645Z offers a higher resolution than the 5DS (50.3MP), but the 645Z nevertheless has larger individual pixels (pixel pitch of 5.31μm versus 4.14μm for the 5DS) due to its larger sensor. However, the 5DS is a somewhat more recent model (by 9 months) than the 645Z, and its sensor might have benefitted from technological advances during this time that enhance the light gathering capacity of its pixels. Coming back to sensor resolution, it should be mentioned that the 645Z has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
Consistent information on actual sensor performance is available from DXO Mark for most cameras. 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.
|Pentax 645Z (⇒ rgt)||Medium Format||51.1||8256||6192||1080/60i||26.0||14.7||4505||101|
|Canon 5DS (⇒ lft)||Full Frame||50.3||8688||5792||1080/60p||24.7||12.4||2381||87|
|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 5D Mark III (⇒ lft | rgt)||Full Frame||22.1||5760||3840||1080/30p||24||11.7||2293||81|
|Canon 5D Mark II (⇒ lft | rgt)||Full Frame||21.0||5616||3744||1080/30p||23.7||11.9||1815||79|
|Fujifilm GFX 50S (⇒ lft | rgt)||MF||51.1||8256||6192||1080/30p||..||..||..||..|
|Hasselblad X1D (⇒ lft | rgt)||Medium Format||51.3||8272||6200||1080/25p||26.2||14.8||4489||102|
|Leica SL (⇒ lft | rgt)||Full Frame||24.0||6000||4000||4K/30p||25.0||13.4||1821||88|
|Nikon D850 (⇒ lft | rgt)||Full Frame||45.4||8256||5504||4K/30p||26.4||14.8||2660||100|
|Nikon D7200 (⇒ lft | rgt)||APS-C||24.0||6000||4000||1080/60p||24.5||14.6||1333||87|
|Pentax 645D (⇒ lft | rgt)||Medium Format||39.5||7264||5440||no||24.6||12.6||1262||82|
|Sony A7R II (⇒ lft | rgt)||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98|
|Sony RX10 II (⇒ lft | rgt)||1-inch||20.0||5472||3648||4K/30p||23.0||12.6||531||70|
Many modern cameras are not only capable of taking still images, but can also record movies. Both cameras under consideration have a sensor with sufficiently fast read-out times for moving pictures, but the 5DS provides a faster frame rate than the 645Z. It can shoot movie footage at 1080/60p, while the Pentax is limited to 1080/60i.
Beyond body and sensor, cameras can and do differ across a range of features. The 645Z and the 5DS 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 following table reports on some other key feature differences and similarities of the Pentax 645Z, the Canon 5DS, and comparable cameras. If you need more detail on the specs, you can find comprehensive listings, for example, in the dpreview camera hub.
|Pentax 645Z (⇒ rgt)||optical||YES||3.2||1037||tilting||no||4000||3.0||no||no|
|Canon 5DS (⇒ lft)||optical||YES||3.2||1040||fixed||no||8000||5.0||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 5D Mark III (⇒ lft | rgt)||optical||YES||3.2||1040||fixed||no||8000||6.0||no||no|
|Canon 5D Mark II (⇒ lft | rgt)||optical||YES||3.0||920||fixed||no||8000||3.9||no||no|
|Fujifilm GFX 50S (⇒ lft | rgt)||no||YES||3.2||2360||tilting||YES||4000||3.0||no||no|
|Hasselblad X1D (⇒ lft | rgt)||2360||no||3.0||920||fixed||YES||2000||2.3||no||no|
|Leica SL (⇒ lft | rgt)||4400||YES||3.0||1040||fixed||YES||8000||11.0||no||no|
|Nikon D850 (⇒ lft | rgt)||optical||YES||3.2||2359||tilting||YES||8000||9.0||no||no|
|Nikon D7200 (⇒ lft | rgt)||optical||YES||3.2||1229||fixed||no||8000||6.0||12||no|
|Pentax 645D (⇒ lft | rgt)||optical||YES||3.0||921||fixed||no||4000||1.1||no||no|
|Sony A7R II (⇒ lft | rgt)||2400||no||3.0||1229||tilting||no||8000||5.0||no||YES|
|Sony RX10 II (⇒ lft | rgt)||2359||YES||3.0||1229||tilting||no||3200||14.0||10.2||no|
Both the 645Z and the 5DS are current models that good online retailers will have in stock. You can check the latest prices, for example, at amazon. The 645Z replaced the earlier Pentax 645D, while the 5DS does not have a direct predecessor.
So what is the bottom line? Which of the two cameras – the Pentax 645Z or the Canon 5DS – has the upper hand? A synthesis of the relative strong points of each of the models is listed below.
Arguments in favor of the Pentax 645Z:
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
- More heavily discounted: Has been on the market for longer (launched in April 2014).
Advantages of the Canon EOS 5DS:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- Better video: Provides higher movie framerates (1080/60i vs 1080/60p).
- Faster shutter: Has a higher mechanical shutter speed (8000/sec vs 4000/sec) to freeze action.
- Faster burst: Shoots at higher frequency (5 vs 3 flaps/sec) to capture the decisive moment.
- Less heavy: Has a lower weight (by 620g or 40 percent) and is thus easier to take along.
- More affordable: Was introduced into a lower priced category (56 percent cheaper at launch).
- More modern: Was introduced somewhat (9 months) more recently.
If the number of relative strengths (bullet points above) is taken as a guide, the 5DS is the clear winner of the contest (7 : 3 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.
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 handling experience and imaging performance when actually working with the 645Z or the 5DS. 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 expert reviews are important. The adjacent table relays the overall verdicts of several of the most popular 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.
|Pentax 645Z (⇒ rgt)||-||-||4.5/5||5/5||5/5||2014||8,499||latest||check|
|Canon 5DS (⇒ lft)||Rec||83/100 Silver||4.5/5||5/5||4.5/5||2015||3,699||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 5D Mark III (⇒ lft | rgt)||HiRec||82/100 Gold||4.5/5||5/5||4.5/5||2012||3,499||discont.||check|
|Canon 5D Mark II (⇒ lft | rgt)||91/100||79/100 HiRec||4/5||5/5||-||2008||3,499||discont.||check|
|Fujifilm GFX 50S (⇒ lft | rgt)||-||85/100 Gold||5/5||5/5||4.5/5||2016||6,499||latest||check|
|Hasselblad X1D (⇒ lft | rgt)||-||-||-||-||4/5||2016||8,995||latest||check|
|Leica SL (⇒ lft | rgt)||-||84/100||4.5/5||4/5||4/5||2015||7,450||latest||check|
|Nikon D850 (⇒ lft | rgt)||..||89/100 Gold||4.5/5||..||5/5||2017||3,299||latest||check|
|Nikon D7200 (⇒ lft | rgt)||HiRec||84/100 Silver||4.5/5||4/5||4.5/5||2015||1,199||discont.||check|
|Pentax 645D (⇒ lft | rgt)||-||-||-||4.5/5||-||2010||9,995||discont.||check|
|Sony A7R II (⇒ lft | rgt)||HiRec||90/100 Gold||5/5||4.5/5||5/5||2015||3,199||discont.||check|
|Sony RX10 II (⇒ lft | rgt)||HiRec||82/100 Gold||4.5/5||4.5/5||4/5||2015||1,299||discont.||check|
Care should be taken when interpreting the review scores above, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. It should also be noted that some of the review sites have over time altered the way they render their verdicts.
If you would like to see a different side-by-side camera review, just make your choice using the following search menu. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting. If the camera you are interested in is not available, kindly get in touch, and I will try to locate and add the respective data to the application.
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