Hi Camera Lovers 👋 If you buy a camera through our referral links, you support our site at no cost to you 😉 Full info here.

Fujifilm X-T4 vs Pentax K-3 Mark III

Storage & Battery

Fujifilm X-T4

Fujifilm X-T4

Pentax K-3 Mark III

Pentax K-3 Mark III
Fujifilm X-T4
Pentax K-3 Mark III
K-3 Mark III
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 26, 2020
March 30, 2021
Camera Type
Camera Size
Camera Weight

The Pentax K-3 Mark III outperforms the Fujifilm X-T4 with a score of 83/100 compared to 76/100. Both cameras share similar dimensions, with the X-T4 measuring 135 x 93 x 84mm and the K-3 Mark III at 135 x 104 x 74mm. However, the X-T4 is lighter, weighing 607g, while the K-3 Mark III weighs 820g.

The K-3 Mark III’s higher score reveals its superior performance, despite being a DSLR compared to the X-T4’s mirrorless design. On the other hand, the X-T4’s lighter weight and lower launch price of $1699 give it an edge over the K-3 Mark III’s $1999 price tag.

Considering the scores and specifications, the Pentax K-3 Mark III is the better camera, but the Fujifilm X-T4 offers a more budget-friendly and lightweight option for those prioritizing portability.

Fujifilm X-T4 vs Pentax K-3 Mark III Overview and Optics

The Pentax K-3 Mark III outperforms the Fujifilm X-T4 in optics, scoring 82/100 compared to the X-T4’s 73/100. Both cameras share several specifications, such as 26-megapixel CMOS sensors, APS-C sensor sizes, and image stabilization. They also have distinct lens mounts, with the X-T4 using Fujifilm X and the K-3 Mark III using Pentax KAF2.

The K-3 Mark III excels with its DXOMARK sensor score of 96, which the X-T4 lacks as DXOMARK does not score Fujifilm cameras. This high score signifies better sensor performance in the K-3 Mark III. Additionally, the K-3 Mark III uses the Prime IV processor, which contributes to its superior optics score.

Conversely, the X-T4 has a faster shooting speed of 20 compared to the K-3 Mark III’s 12. This advantage allows the X-T4 to capture more frames per second, making it better suited for action and sports photography.

Considering these points, the Pentax K-3 Mark III offers better optics due to its high DXOMARK sensor score and Prime IV processor. However, the Fujifilm X-T4 provides a faster shooting speed, which may be more appealing to photographers who prioritize capturing fast-moving subjects. Ultimately, the choice between these cameras depends on individual preferences and specific photography needs, but the K-3 Mark III has a clear edge in optics performance.

The higher the number of megapixels, the more detail the cameras sensor can capture.
26 MP
26 MP
Image Resolution
Image resolution is measured in pixels and megapixels, width by height. The higher the number, the higher its resolution.
6240 x 4160 px
6192 x 4128 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.
23.5 x 15.6 mm
23 x 15.5 mm
Sensor Format
Refers to the most commonly used sensor sizes.
Frame Rate
The number of sequential frames per second the camera can write to the memory card when shooting in burst or continuous mode.
20 fps
12 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.
Fujifilm X
Pentax KAF2
Image Processor
The image processor in the camera converts the information collected on the sensor for digital storage on the memory card.
X-Processor 4
Prime IV
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/ 8000 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)
Viewfinder Resolution
3,690,000 dots

Fujifilm X-T4 vs Pentax K-3 Mark III Video Performance

The Fujifilm X-T4 outperforms the Pentax K-3 Mark III in video capabilities, scoring 91 points compared to the latter’s 83 points. Both cameras share some common features, such as 4K video resolution and built-in time-lapse functionality. However, the X-T4 boasts superior specs, which contribute to its higher score and better performance in video recording.

The Fujifilm X-T4 offers a higher maximum video dimension of 4096 x 2160, compared to the Pentax K-3 Mark III’s 3840 x 2160. This difference in dimensions allows the X-T4 to produce videos with greater detail and clarity. Additionally, the X-T4 has a higher maximum video frame rate of 120fps, doubling the K-3 Mark III’s 60fps. This higher frame rate enables the X-T4 to capture smoother slow-motion footage and produce more fluid videos.

Despite its lower score, the Pentax K-3 Mark III still performs well in video recording. It shares the 4K video resolution and built-in time-lapse functionality with the X-T4, making it a capable camera for various video projects. However, its lower video dimensions and frame rate limit its potential compared to the X-T4.

Based on these points, the Fujifilm X-T4 is the better camera for video recording, offering higher video dimensions and a faster frame rate for improved video quality and smoothness. The Pentax K-3 Mark III, while still a competent camera, falls short in these areas. Filmmakers and content creators should consider these differences when choosing between the two cameras for their video projects.

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.
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.
4096 x 2160 px
3840 x 2160 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.
120 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.

Fujifilm X-T4 vs Pentax K-3 Mark III Features and Benefits

The Pentax K-3 Mark III edges out the Fujifilm X-T4 in features with a score of 87/100 compared to the X-T4’s 85/100. Both cameras share several specifications, including a touchscreen, 1,620,000-dot screen resolution, Wi-Fi, and Bluetooth connectivity. Neither camera has GPS capabilities.

The Pentax K-3 Mark III has a larger screen size of 3.2 inches, which offers more viewing space than the Fujifilm X-T4’s 3-inch screen. This larger screen size provides an advantage for photographers who prefer a bigger display for composing and reviewing images.

On the other hand, the Fujifilm X-T4 has a flip screen, while the Pentax K-3 Mark III does not. The flip screen is beneficial for photographers who often shoot from challenging angles, as it allows for better visibility and easier composition. This feature can also be useful for vloggers and content creators who need to see themselves while filming.

Despite the Fujifilm X-T4’s flip screen advantage, the Pentax K-3 Mark III’s higher feature score and larger screen size make it a strong contender in this comparison. The Fujifilm X-T4, however, should not be overlooked due to its flip screen, which can be a crucial feature for some users.

Ultimately, the choice between these two cameras depends on individual preferences and requirements. The Pentax K-3 Mark III offers a larger screen size, while the Fujifilm X-T4 provides the added benefit of a flip screen. Both cameras have their merits, and photographers should consider their specific needs when choosing between the two.

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.
1,620,000 dots
1,620,000 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.

Fujifilm X-T4 vs Pentax K-3 Mark III Storage and Battery

The Pentax K-3 Mark III wins in the storage and battery category with a score of 81/100, while the Fujifilm X-T4 scores 73/100. Both cameras have two memory card slots and accept SD, SDHC, and SDXC cards. However, the X-T4 is UHS-II compatible for both slots, whereas the K-3 Mark III has only one UHS-II compatible slot.

The K-3 Mark III outperforms the X-T4 in battery life, offering 800 shots compared to the X-T4’s 500 shots. Both cameras use different battery types, with the K-3 Mark III using the D-LI90 and the X-T4 using the NP-W235. Additionally, both cameras have USB charging capabilities.

While the X-T4 falls short in battery life, it does have an advantage in memory card compatibility with both slots being UHS-II compatible. This allows for faster read and write speeds, which can be beneficial for photographers who need to quickly transfer large files.

Despite the X-T4’s advantage in memory card compatibility, the K-3 Mark III’s superior battery life makes it the better choice for photographers who prioritize longer shooting sessions without needing to recharge or swap batteries.

Storage and Battery
Storage and Battery
Memory Card
SD / SDHC / SDXC (UHS-II compatible)
SD / SDHC / SDXC (1 slot is UHS-II compatible)
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.
500 shots
800 shots
USB Charging
Sensor scores tested by DXOMARK

Alternatives to the Fujifilm X-T4 and Pentax K-3 Mark III

Fujifilm X-T4 vs Pentax K-3 Mark III Comparison image.

Are you still undecided about which camera is right for you? Have a look at these popular comparisons that feature the Fujifilm X-T4 or the Pentax K-3 Mark III:

User Scores
Spotted a mistake with these camera specs? Please let us know so we can update it!