Manuals / Phase One / Photography / Digital Camera

Phase One 645 AF manual Depth of field, Depth of Field Preview Button

Models: 645 AF

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When the aperture is open (the subject depth is small)

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When the aperture is stopped down (the subject depth is large)

NOTICE:

While operating the preview button, you cannot release the shutter

4.8Depth of field

Depth of field (D.O.F.) is defined as the zone of sharpness before and behind the plane of focus. It depends on distance to subject, focal length of lens, aperture setting and distance the lens is focused at.

In addition to visual observation via the depth of field preview button, the D.O.F. can be determined by using the depth of field scale on each lens. The f/stop numbers appear on both the right and left side of the white index mark in the center of the scale. Simply read the figures which appear above the f/stop numbers on the distance scale of the lens. (see illustration below)

Depth of Field Preview Button

When the preview button is pressed in, the depth of field for the aperture set on the camera can be checked by looking through the viewfinder.

After focusing, press the preview button. The diaphragm will be stopped down to the set aperture.

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Phase One 645 AF manual Depth of field, Depth of Field Preview Button
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645 AF specifications

The Phase One 645 AF is a high-end medium format camera system designed for professional photographers seeking exceptional image quality and versatility. With its robust feature set and advanced technologies, it has become a preferred choice for commercial, portrait, and landscape photography.

At the heart of the 645 AF is its large 645-format sensor, which captures images at a remarkably high resolution. This sensor size not only ensures more detail in each shot but also provides superior dynamic range, allowing photographers to reproduce subtle lighting nuances in their work. The high pixel count is complemented by Phase One’s exceptional image processing capabilities, making it an ideal choice for large print production and high-fidelity image requirements.

One of the defining characteristics of the Phase One 645 AF is its modular design. Photographers can easily swap out different components, such as lenses and digital backs. This flexibility allows users to tailor their camera system to specific shooting requirements, whether that means switching to a high-resolution back for studio work or a faster one for dynamic scenes. The system is compatible with a wide range of Phase One lenses, which are known for their sharpness and optical quality.

The camera features a fast and accurate autofocus system, making it suitable for a variety of shooting conditions. With multiple focus points and advanced tracking capabilities, the 645 AF ensures that subjects are captured with precision, even in fast-paced environments. Additionally, the camera supports various shooting modes, including continuous shooting, which is crucial for capturing fleeting moments.

Another impressive technological advancement of the 645 AF is its robust build quality. Designed to withstand the rigors of professional use, the camera employs weather-sealed construction, ensuring reliable performance in challenging conditions. The ergonomic design provides comfortable handling during long shoots, making it a practical choice for professionals.

Moreover, the Phase One 645 AF integrates seamlessly with the company's Capture One software, allowing photographers to process their images efficiently. This software offers extensive editing capabilities, ensuring that images can be fine-tuned to meet artistic standards.

In summary, the Phase One 645 AF stands out in the world of medium format photography. Its impressive resolution, modular design, superior autofocus capabilities, and rugged construction make it a powerful tool for photographers who demand the very best. By combining state-of-the-art technology with a commitment to quality, the Phase One 645 AF continues to be a benchmark in professional photography.