Simple DoF Calculator for iPhone

Overview of the Precision DoF Assistant

Precision DoF Assistant is a focused utility built for photographers and filmmakers who need reliable depth-of-field and hyperfocal distance figures. It accepts a few basic inputs and instantly provides practical measurements that help plan shots and confirm focus decisions in the field.

Measurements Provided

• Total depth of field (overall in-focus range)
• Near focus limit (closest point that remains acceptably sharp)
• Far focus limit (farthest point still within acceptable sharpness)
• Distances in front of and behind the subject (how much foreground and background are included)

Required Inputs

• Focal length of the lens
• Chosen aperture (f‑stop)
• Subject focus distance
• Camera model/profile

Equipment Compatibility and Profiles

• Works with both film and digital cameras
• Supports major camera manufacturers (for example: Canon, Sony, Nikon, and others)
• Ability to download and install additional camera profiles from within the app

Technical Range and Extensibility

• Aperture coverage spans ultra-fast optics to very small stops (approximately f/0.95 through f/64)
• Handles a wide focal length spectrum (from about 3 mm up to 1200 mm)
• Expandable profile library lets you add uncommon sensors, formats, and custom circle-of-confusion values

Who Benefits Most

Photographers, cinematographers, and lens technicians who require precise, on-the-spot depth-of-field calculations—especially useful for portrait, macro, landscape, and telephoto work—will find this tool valuable for planning compositions and ensuring critical focus.