Pentax 645Z vs Sony a7R III Comparison

The Sony a7R III outperforms the Pentax 645Z with a score of 83/100 compared to 73/100. Both cameras share some common specifications, such as their release years (2014 and 2017) and launch prices ($8,499 and $3,200). The Pentax 645Z, a DSLR, is larger and heavier, measuring 156 x 117 x 123mm and weighing 1550g. On the other hand, the Sony a7R III, a mirrorless camera, is more compact and lightweight at 127 x 96 x 74mm and 657g.

The Sony a7R III’s higher score shows that it is a better camera overall, offering advantages such as its mirrorless design and lighter weight. However, the Pentax 645Z may still be preferred by some users, particularly those who prefer the DSLR format. Ultimately, the choice between these two cameras depends on individual preferences and needs.

Pentax 645Z vs Sony a7R III Overview and Optics

The Sony a7R III wins the optics comparison with a score of 84/100, while the Pentax 645Z scores 79/100. Both cameras share similarities in specifications, such as having a CMOS sensor and a range of compatible lenses due to their respective lens mounts (Pentax 645AF2 for the 645Z and Sony FE for the a7R III).

The Sony a7R III boasts several advantages over the Pentax 645Z. Despite having a slightly lower megapixel count (42.4 vs 51.4), the a7R III has a faster shooting speed of 10 frames per second, compared to the 3 frames per second of the 645Z. This makes the Sony a7R III more suitable for action and sports photography. Additionally, the a7R III features image stabilization, which greatly reduces the chances of blurry images caused by camera shake. The a7R III also has a full-frame sensor, which provides better low-light performance and a shallower depth of field.

On the other hand, the Pentax 645Z has a larger medium format sensor, which allows for higher resolution and more detailed images. The 645Z also has a slightly higher DXOMARK score for its sensor (101 vs 100), indicating better overall image quality. However, the lack of image stabilization and slower shooting speed may limit its versatility in certain situations.

Considering these factors, the Sony a7R III is the better option for photographers who value speed, image stabilization, and low-light performance. The Pentax 645Z may still appeal to those who prioritize high-resolution images and are willing to compromise on speed and versatility.

The Pentax 645Z outperforms the Sony a7R III in video capabilities with a score of 70/100, compared to the Sony’s 56/100. Both cameras have distinct features and advantages for video recording, making them suitable for different users and purposes.

Both the Pentax 645Z and the Sony a7R III share some common video specifications. They both provide Full HD (1920 x 1080) video resolution, and the Pentax 645Z has a slightly higher maximum frame rate of 60fps, while the Sony a7R III offers a maximum of 30fps.

The Pentax 645Z excels in its video features with a built-in time-lapse functionality, which the Sony a7R III lacks. This makes the Pentax 645Z a better choice for videographers who require time-lapse capabilities without the need for additional equipment or software.

On the other hand, the Sony a7R III offers a higher maximum video resolution of 4K (3840 x 2160), which is not available on the Pentax 645Z. This gives the Sony a7R III an advantage for users who prioritize higher video resolution for their projects.

Considering the video capabilities of both cameras, the Pentax 645Z is a better choice for those who need time-lapse functionality and a higher frame rate for smoother video playback. However, the Sony a7R III is more suitable for users who prioritize higher video resolution, such as 4K, for their projects. Ultimately, the choice between the two cameras depends on the specific requirements and preferences of the videographer.

The Sony a7R III emerges as the winner with a feature score of 83/100, while the Pentax 645Z scores 59/100. Both cameras share some specifications, such as having Wi-Fi connectivity, flip screens, and no GPS. However, the Sony a7R III outperforms the Pentax 645Z in several aspects, making it the superior camera in terms of features.

The Sony a7R III has a higher screen resolution of 1,440,000 dots, compared to the Pentax 645Z’s 1,037,000 dots. This results in a sharper and clearer display on the Sony camera. Additionally, the Sony a7R III has a touchscreen, making it more user-friendly and convenient for photographers to navigate through settings and review images. The Pentax 645Z lacks this feature.

Furthermore, the Sony a7R III has Bluetooth connectivity, which allows for seamless and quick file transfers to compatible devices. The Pentax 645Z does not offer this option. In terms of screen size, the Pentax 645Z has a slightly larger screen at 3.2 inches, compared to the Sony a7R III’s 3-inch screen. However, this minor advantage does not outweigh the benefits provided by the Sony a7R III’s superior features.

The Sony a7R III’s higher feature score of 83/100 reflects its better performance and user-friendly design. On the other hand, the Pentax 645Z’s lower score of 59/100 highlights its limitations in comparison to the Sony a7R III. Therefore, the Sony a7R III is the better camera in terms of features and functionality.

The Pentax 645Z and the Sony a7R III have the same storage and battery score of 65/100. Both cameras feature two memory card slots and accept SD, SDHC, and SDXC memory cards. Additionally, they share the same battery life of 650 shots.

Despite their similar scores, the Sony a7R III has an advantage in storage as it is compatible with UHS-II cards, which offer higher reading and writing speeds. This can be beneficial for photographers who need to transfer large amounts of data quickly.

On the other hand, both cameras use different battery types: the Pentax 645Z uses a D-LI90 battery, while the Sony a7R III uses an NP-FZ100 battery. However, this difference does not affect their performance or battery life, as both cameras provide 650 shots per charge.

Neither camera offers USB charging, which could be a drawback for some users. In terms of storage and battery, the Sony a7R III has a slight advantage due to its UHS-II compatibility, while the Pentax 645Z matches the Sony in all other aspects.

Are you still undecided about which camera is right for you? Have a look at these popular comparisons that feature the Pentax 645Z or the Sony a7R III:

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