Depth of Field Calculator: DoF

Walk up to any scene already knowing exactly what will be sharp.

Dial in your camera, lens, aperture, and subject distance — DoF draws your zone of focus before you shoot: where sharpness begins, where it ends, and how the blur falls away on either side.

Depth of field is the difference between a portrait that breathes and one that doesn't, between a landscape that's crisp to the horizon and one that goes soft where it matters. Most of us learned it from tables and formulas. DoF turns it into something you can see: a live viewfinder strip with a green in-focus band, soft blur gradients at both edges, and a subject pin you drag with your thumb. Open the aperture and watch the band collapse. Stop down and watch it stretch. It stops being math and becomes instinct.

SEE YOUR FOCUS
• A visual viewfinder strip shows the in-focus band and the blur falloff around it
• Drag the subject pin and watch the sharp zone respond instantly
• Near limit, far limit, total depth of field, and hyperfocal distance — always in view

NAIL HYPERFOCAL IN ONE TAP
• Tap Set Hyperfocal and focus jumps straight to the hyperfocal distance
• A clear At Hyperfocal state confirms everything from the near limit to infinity is sharp
• Made for landscapes, cityscapes, and astro foregrounds

COMPARE SETUPS SIDE BY SIDE
• A/B mode holds two configurations next to each other — f/2.8 against f/5.6, one lens against another
• See the trade-off between subject isolation and front-to-back sharpness before you commit

BUILT FOR YOUR GEAR
• 65 camera bodies across 12 brands, plus generic sensor formats: full frame, APS-C, Micro Four Thirds, and more
• Name and save your go-to setups — automatic cloud backup and sync, no account required
• Metric or imperial units, defaulting from your device's locale
• Wheel controls for fast exploration; a long-press keypad when you need exact values
• Honest at the extremes — macro-range caveats appear automatically near a lens's minimum focus distance

AN INSTRUMENT, NOT A SPREADSHEET
Dark, precise, and quick — built to be read at arm's length in the field and checked between frames. Works fully offline, on a ridgeline at dawn or in a basement studio.

FREE MEANS FREE
No subscriptions. No in-app purchases. No ads. No account. DoF does one job, does it properly, and costs nothing. Download it, drop it in your camera bag, and go