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Canon EOS 5DS R vs Pentax 645Z Comparison

Storage & Battery

Canon EOS 5DS R

Canon EOS 5DS R camera image

Pentax 645Z

Pentax 645Z
Canon EOS 5DS R
Pentax 645Z
Refers to the year this camera was officially made available for sale.
Announcement Date
Refers to the date the manufacturer publicly announced the upcoming release and general specs of this camera.
February 06, 2015
April 15, 2014
Camera Type
Camera Size
Camera Weight

The Pentax 645Z outperforms the Canon EOS 5DS R with a score of 73/100 compared to 68/100. Both cameras are DSLRs, announced in 2014 and 2015 respectively. They share similarities in size, with the Canon measuring 152 x 116 x 76mm and the Pentax at 156 x 117 x 123mm. However, the Pentax 645Z is significantly heavier at 1550g, while the Canon weighs 930g.

The higher score of the Pentax 645Z showcases its superior performance. Despite being an older model, it still maintains a higher launch price of $8499 compared to the Canon’s $3900. On the other hand, the Canon EOS 5DS R has the advantage of being lighter and more affordable.

Taking these factors into account, the Pentax 645Z is a better camera overall, but the Canon EOS 5DS R remains a viable option for those seeking a lighter and more budget-friendly alternative.

Canon EOS 5DS R vs Pentax 645Z Overview and Optics

The Pentax 645Z is the winner in the optics comparison, scoring 79/100, while the Canon EOS 5DS R scores 73/100. Both cameras share some common specifications, such as having a CMOS sensor, no image stabilization, and a similar megapixel count (51.4 for the Pentax 645Z and 50.6 for the Canon EOS 5DS R).

The Pentax 645Z outperforms the Canon EOS 5DS R in several aspects. Its medium format sensor size is larger than the full-frame sensor of the Canon EOS 5DS R, which contributes to its superior DXOMARK sensor score of 101, compared to 86 for the Canon EOS 5DS R. The larger sensor size enables better image quality and greater detail. Additionally, the Pentax 645Z has a 4:3 aspect ratio, providing more flexibility in composing images, especially for printing and framing.

On the other hand, the Canon EOS 5DS R has some advantages over the Pentax 645Z. Its shooting speed of 5 frames per second is faster than the 3 frames per second of the Pentax 645Z, making it more suitable for capturing fast-moving subjects. Furthermore, the Canon EOS 5DS R utilizes a dual Digic 6 processor, which may provide better processing performance than the Prime III processor of the Pentax 645Z.

Taking all factors into account, the Pentax 645Z is the better camera in terms of optics due to its larger sensor size, higher DXOMARK sensor score, and more versatile aspect ratio. However, the Canon EOS 5DS R still has its merits with a faster shooting speed and potentially better processing performance. Ultimately, the choice between these two cameras will depend on the specific needs of the photographer.

The higher the number of megapixels, the more detail the cameras sensor can capture.
50.6 MP
51.4 MP
Image Resolution
Image resolution is measured in pixels and megapixels, width by height. The higher the number, the higher its resolution.
8688 x 5792 px
8256 x 6192 px
Sensor Type
The camera sensor captures light and records the image. Sensors vary in physical size, the number of pixels, and quality.
Sensor Size
The sensor size contributes to the overall quality as well as the dynamic and tonal range a camera can capture. As a rule of thumb, the more surface there is to read the light, the more information it will capture.
24 x 36 mm
32.8 x 43.8 mm
Sensor Format
Refers to the most commonly used sensor sizes.
Full Frame
Medium Format
Frame Rate
The number of sequential frames per second the camera can write to the memory card when shooting in burst or continuous mode.
5 fps
3 fps
Lens Mount
The lens mount will tell you what type of lens range you can fit onto the camera body. Often the same camera company will have different lens ranges for different cameras.
Canon EF
Pentax 645AF2
Image Processor
The image processor in the camera converts the information collected on the sensor for digital storage on the memory card.
Dual Digic 6
Prime III
Aspect Ratio
The aspect ratio refers to the proportional difference between width and height. The most popular aspect ratios are 3:2 and 4:3.
Minimum ISO (Native)
Refers to the lowest native (or 'base') ISO setting. Lower ISO are less sensitive to light but make a cleaner image.
Maximum ISO (Native)
Refers to the highest native (or 'base') ISO setting. Higher ISO is necessary for low-light situations or night photography, but higher ISOs often introduce grain or noise.
Minimum ISO (Expanded)
Expanded (or extended) ISO is a digitally enhanced feature available on some cameras. It allows you to push beyond the native ISO range if necessary.
Maximum ISO (Expanded)
Expanded (or extended) ISO is a digitally enhanced feature available on some cameras. It allows you to push beyond the native ISO range if necessary.
Minimum Shutter Speed
The minimum shutter speed will tell you the longest exposure your camera can take without using an external accessory.
30 s
30 s
Maximum Shutter Speed
The maximum shutter speed tells you the length inside 1 second the camera will capture. These can sometimes be extended with accessories such as extra external batteries.
1/ 8000 s
1/ 4000 s
Autofocus Points
Autofocus points show where the camera is focusing graphically as squares or brackets in Live View or on an electronic viewfinder. These points are also used for light meter readings.
In-body Stabilization
In-body Stabilization means the camera has a certain technology embedded that counteracts camera shake.
Viewfinder Type
The viewfinder type is either electronic or optical. Electronic viewfinders will have a small screen in the viewfinder. Optical viewfinders will use prisms and mirrors to look through the lens.
Optical (pentaprism)
Optical (pentaprism)

Canon EOS 5DS R vs Pentax 645Z Video Performance

The Pentax 645Z outperforms the Canon EOS 5DS R in video capabilities, with a score of 70/100, a 13-point lead over the Canon’s 57/100. Both cameras share some common specs, including Full HD (1920 x 1080) maximum video resolution and built-in time-lapse functionality.

The Pentax 645Z excels with a higher maximum video frame rate of 60fps, which is double the Canon EOS 5DS R’s 30fps. This higher frame rate allows the Pentax 645Z to capture smoother and more detailed video, particularly in fast-paced situations or when recording action scenes.

On the other hand, the Canon EOS 5DS R does not offer any significant advantages in video capabilities over the Pentax 645Z. Its lower maximum video frame rate of 30fps may limit its potential in capturing fast-moving subjects or events with the same level of detail and smoothness as the Pentax 645Z.

Considering these points, the Pentax 645Z is the clear winner in terms of video capabilities, thanks to its higher maximum video frame rate of 60fps. This advantage makes it a more suitable choice for users who prioritize video performance in their camera selection. Meanwhile, the Canon EOS 5DS R lags behind in this aspect, making it a less ideal option for those focusing on video recording.

Indicates if this camera is capable of recording video.
Max Video Resolution
The best resolution this camera can capture video in. Modern cameras can capture up to 8K video.
Full HD
Full HD
Max Video Dimensions
Video resolution measured by the greatest number of pixels possible in each frame, width by height. A higher resolution means more detail or clarity in your video.
1920 x 1080 px
1920 x 1080 px
Max Video Frame Rate
How many frames per second your video will capture. Most cameras have options for multiple frame rates, depending on the resolution you shoot in. For a general video, 24p or 30p is the standard, but more serious filmmakers may need a higher frame rate for creative effect.
30 p
60 p
Time-Lapse Built In
A built in time-lapse mode will allow continuous shooting throughout a prolonged period of time to be compressed into a sped up video.
Video File Format
Different cameras can record in various video file formats. The File format you record in can impact how you edit and use the files.

Canon EOS 5DS R vs Pentax 645Z Features and Benefits

The Canon EOS 5DS R and the Pentax 645Z both have a feature score of 59/100, indicating that they share many specifications. However, some differences make each camera stand out in particular aspects.

Both cameras have a 3.2-inch screen and similar screen resolutions, with the Canon EOS 5DS R at 1,040,000 dots and the Pentax 645Z at 1,037,000 dots. Neither camera has a touchscreen or GPS, and both lack Bluetooth connectivity.

The Pentax 645Z is superior in two aspects: it has a flip screen and Wi-Fi capabilities. The flip screen allows for more flexibility in shooting angles, making it easier to capture images from different perspectives. Wi-Fi connectivity enables wireless image transfer, making it more convenient for photographers to share and backup their work.

The Canon EOS 5DS R, on the other hand, does not offer any unique advantages over the Pentax 645Z in terms of features. It shares the same score, but lacks the flip screen and Wi-Fi capabilities found in the Pentax 645Z.

Taking these factors into consideration, the Pentax 645Z is the better camera in terms of features, thanks to its flip screen and Wi-Fi capabilities. The Canon EOS 5DS R does not offer any distinct advantages in this comparison, as both cameras share the same feature score. However, it is important to remember that each photographer’s needs and preferences may differ, and the best choice of camera ultimately depends on individual requirements and priorities.

Built-in Flash
A built-in flash will often be positioned right above the lens. This will automatically pop up when you activate it.
External Flash
External flashes are often connected through a hot shoe at the top of a camera, or a cable at the side of the camera.
GPS features in a camera will include location metadata to each of your photographs.
Weather Sealing
Weather sealing capabilities will give you more confidence when shooting in unfavourable conditions.
Screen Type
Touch Screen
Touchscreen allows you to change camera settings and access menus with a swipe of your finger, instead of using buttons.
Screen Size
Screen Resolution
Screen dots indicate the resolution of the LCD screen by including each sub pixel.
1,040,000 dots
1,037,000 dots
Flip Screen
A flip screen (or articulating screen) is a second screen which can flip out from the side or top of the camera. This rotating screen allows you more freedom to take photos at different angles.
Live View
Live View feature allows you to see a continuous live video of what is being seen through your lens.
Bluetooth capabilities allow you wireless control of your camera with other external devices.

Canon EOS 5DS R vs Pentax 645Z Storage and Battery

The Canon EOS 5DS R and the Pentax 645Z share an equal storage and battery score of 65/100. Both cameras have two memory card slots, accepting SD/SDHC/SDXC cards. Neither camera offers USB charging.

The Canon EOS 5DS R edges ahead with its battery life, providing 700 shots per charge compared to the Pentax 645Z’s 650 shots. This difference in battery life is due to the Canon using an LP-E6 battery, while the Pentax uses a D-LI90 battery. The extra 50 shots from the Canon may be beneficial for extended shooting sessions.

On the other hand, the Pentax 645Z is compatible with all SD/SDHC/SDXC cards, whereas the Canon EOS 5DS R requires UHS-I compatible cards. This broader compatibility may offer more flexibility when purchasing memory cards for the Pentax 645Z.

Despite their equal scores, the Canon EOS 5DS R provides a slightly longer battery life, while the Pentax 645Z offers greater memory card compatibility. These differences may impact a photographer’s choice depending on their specific needs and preferences.

Storage and Battery
Storage and Battery
Memory Card
SD/SDHC/SDXC (UHS-I compatible), Compact Flash
Dual Memory Card Slots
Battery Type
Battery Life
Approximately how long this cameras battery will last measured by how many photographs you will be able to take.
700 shots
650 shots
USB Charging
Sensor scores tested by DXOMARK
Overall Score
DXOMARK overall sensor score.
Portrait (Color Depth)
As described by DXOMARK 'The Portrait score in our camera sensor reviews defines color depth performance and its unit is a number of bits. A color depth of 22 bits is excellent; differences below 1 bit are barely noticeable.'
24.6 bits
26 bits
Landscape (Dynamic Range)
As described by DXOMARK 'The Landscape score in our camera sensor tests defines the maximum dynamic range of the camera sensor and its unit is an exposure value (EV). A value of 12 EV is excellent with differences below 0.5 EV usually not noticeable.'
12.4 EVs
14.7 EVs
Sports (Low-Light ISO)
Described by DXOMARK as 'The maximal value of ISO sensitivity needed to reach a given value of Signal-to-Noise Ratio (SNR). The greater the value, the better'

Canon EOS 5DS R vs Pentax 645Z – Our Verdict

Canon EOS 5DS R vs Pentax 645Z Comparison image.

Are you still undecided about which camera is right for you? Have a look at these popular comparisons that feature the Canon EOS 5DS R or the Pentax 645Z:

User Scores
B&H photo video
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