Pentax K-3 III Review

In this comprehensive Pentax K-3 III review, we will cover the most important aspects of company's newest Pro SLR, including key features, body and handling, performance and image quality. You can also find the additional questions and answers concerning some particular features of the K-3 III.

The Pentax K-3 III is a camera designed for enthusiast photographers that was revealed to the public on 2021-04-06 and is equipped with an APS-C sensor. When it comes to the price(buy Pentax K-3 III from Amazon), the Pentax K-3 III costs for body-only and joins company’s APS-C camera line up with a 25.7MP CMOS sensor.

The combination of 25.7-MP sensor and latest image processing engine in a compact and affordable body is bound to be a tempting prospect for both new and existing users. Before going into the details of the Pentax K-3 III view, let's take a quick look at a summary of the features list. Then we can look deeper to the main features such as build quality, handling, ergonomics, performance and image quality.

Introduction and Key Features Body and Handling Performance and Image Quality Conclusions Questions and Answers (FAQ)

Pentax K-3 III - Key Features

Let's take a look at the features of this Pro SLR at a glance before going into the Pentax K-3 III review. In this way, you get a preliminary idea. Check it out!

Pentax K-3 III Front
Looking for a Pentax K-3 III review? In this article we cover the key features, body & handling, performance and image quality.


25.7-megapixel APS-C CMOS


Auto, 100-160000 (1, 1/2 or 1/3 EV steps)

AF System

SAFOX 13 TTL phase-matching - 101 point (25 cross type focus points in the center)


4K UHD up to 3840x2160 (30p/​24p)

Shutter speed

1/8000 - 30 sec

Continuous Shooting Speed

12.0 frames per second




5.3 x 4.1 x 2.9 in. (135 x 104 x 74 mm)


28.9 oz (820 g) includes batteries

Pentax K-3 III Full Specifications

Pentax K-3 III - Body and Handling

Compared with the predecessors, The Pentax K-3 III has a deeper grip, as well as an improved texture. You can certainly notice the larger area for your hand between the lens and grip, and this makes the camera more comfortable to hold. The dimensions of the K-3 III are 5.3 x 4.1 x 2.9 in. (135 x 104 x 74 mm) and the camera weighs 28.9 oz (820 g) includes batteries for body-only.

Pentax K-3 III Back

Pentax K-3 III - Viewfinder

The K-3 III has a Optical / LCD viewfinder. The viewfinder has magnification, which is a 35mm equivalent of 1.05x magnification. The 3.2-inch 1,620,000 dots (540,000 px) LCD screen feels solid and looks good with good colour and clear text. The LCD has an touch screen which is useful for shooting at awkward angles, as well as being useful for video work. The touch-screen is very responsive, making it quick and easy to change settings and you can use it to scroll through the menus and change settings.

Pentax K-3 III - Battery

The camera uses the Proprietary D-LI90 battery. It is backward compatible and offers 800 shots per charge according to CIPA ratings. As usual with CIPA ratings, you may get many more than this with better use of LCD and OVF combination.

Pentax K-3 III - Memory Card Slot

By default, the Pentax K-3 III doesn't come with a memory card. Some retailers put together bundles that do include one, but chances are that you'll need to pick up an SD card separately.

Pentax K-3 III supports dual card slots. You can use SD / SDHC / SDXC type memory cards. The technical difference between those two specifications are in the filesystem they're formatted with, but the practical difference is that cards 32GB and smaller will be labeled SDHC and cards 64GB and larger will be labeled SDXC.

Pentax K-3 III - Connectivity

On the side, you'll find USB 3.2 Gen1 (Type-C), Micro B,Micro (Type D) HMDI, External cable switch terminal (2.5mm), X-sync socket, 3.5mm stereo mic input, 3.5mm headphone jack. The camera can output clean HDMI, in case you want to record video to an external recorder. For sending captured images the camera offers Wi-Fi and Bluetooth. When it comes to GPS we have to say the camera has not built-in support.

Pentax K-3 III Top

Pentax K-3 III - Performance and Image Quality

Pentax K-3 III - AF System

The AF system of the Pentax K-3 III is SAFOX 13 TTL phase-matching - 101 point (25 cross type focus points in the center). This is ideal for working with long lenses and teleconverters. The low-light working range of the autofocus system is rated for +/- 5.0EV in 0.3EV steps.

Autofocus system of the K-3 III includes metering modes like TTL open-aperture: Multi-segment with 307K-pixel RGBIr sensor, Center-weighted, Spot, Highlight-weighted.

Pentax K-3 III - ISO Sensitivity

Native ISO sensitivity range of Pentax K-3 III starts from 100 to 160000. The camera’s full ISO rates are as follows Auto, 100-160000 (1, 1/2 or 1/3 EV steps).

Pentax K-3 III - Video Features

The Pentax K-3 III can record 4K UHD video at up to 3840x2160 (30p/​24p). However, since it’s captured from a 3840 x 2160 pixel area at the centre of the sensor, it a provides a detailed footage. The camera is also capable of Full HD video (1920 x 1080) capture at up to 60 fps. The K-3 III can create movies right in the camera.

Pentax K-3 III Left

Pentax K-3 III - Conclusions

The Pentax K-3 III is a great all round performer, which is well-suited to a range of photography subjects that the average enthusiast is likely to tackle. The camera is also smaller and lighter, arguably making it a better option for traveling.

If you regularly shoot in low light environments or high ISO speeds, and want to be able to record 4K UHD video, then the Pentax K-3 III will be a great choice.

Overall, the Pentax K-3 III is a great all-round enthusiast camera for those looking for their next step up Dslr with excellent image quality, and reliable performance.

Pentax K-3 III Right

Pentax K-3 III - Questions and Answers (FAQ)

What is the sensor technology found in the K-3 III?

The camera comes with an APS-C image sensor and is a CMOS (Complementary Metal–Oxide–Semiconductor).

What is the native ISO sensitivity range of the K-3 III?

The camera has a native ISO sensitivity from 100 to 160000.

What is the fastest shutter speed that can be used with flash?

The K-3 III's flash sync speed is 1/200.

What is the buffer size for RAW and JPEG shooting?

Buffer size for RAW is approximately , while the JPEG shooting is 30.

What battery does Pentax K-3 III use?

The camera uses the Proprietary D-LI90, which is a Lithium-ion rechargeable.

What is the battery life of Pentax K-3 III?

Shoot all day and well into the night with up to approximately 800 shots per charge (CIPA standard).

Notes About Pentax K-3 III Review

Specific assessments of the cameras should be instructive in revealing the technical characteristics of the cameras. For example, in practice, the Pentax K-3 III review should convey various details about usage, response, and overall viewing quality to the user. User comments, such as those found on Amazon, can sometimes give information about these issues, but such feedback is often incomplete, inconsistent, and biased.

As users, you should pay attention to the reviews made by experts. That's why we find it important to include the correct and expert opinions on the Pentax K-3 III review.