ConverterHub

Hyperfocal Distance Calculator

Focus once, keep everything sharp to infinity

Result

2.42
1.21

How it is calculated

The tool computes

H = f² / (N × c) + f in millimetres, then H (m) = H / 1000 and near limit = H / 2

f is the lens focal length in mm, N the f-number (for f/8 enter 8) and c the circle of confusion in mm, the blur size you accept as sharp. Both answers are in metres with two decimals. If you focus at H, everything from H/2 to infinity is acceptably sharp. All three values must be above zero. The circle of confusion depends on your sensor and viewing size; a smaller value gives a longer, more demanding hyperfocal distance.

Worked example

A 24 mm lens at f/8 with a circle of confusion of 0.03 mm.

  1. f² = 576 and N × c = 8 × 0.03 = 0.24
  2. 576 / 0.24 = 2400, plus f (24) = 2424 mm
  3. In metres: 2.42; near limit = 2.42 / 2 = 1.21

Focus about 2.42 m away and everything from about 1.21 m to infinity should look sharp.

Try this example →

Common mistakes

  • Entering the focal length in metres or the circle of confusion in microns: both are in millimetres, such as 24 and 0.03.
  • Using the same circle of confusion on every camera: a full-frame value is about 0.03 mm, a smaller sensor needs a smaller one.
  • Using the equivalent focal length or equivalent aperture: enter the lens's real focal length and real f-number.
  • Reading the result in feet or millimetres: the output is in metres.

About this calculator

The hyperfocal distance is the closest focus point that still keeps infinity acceptably sharp, calculated as H = f²/(N·c) + f, where f is focal length, N is the f-number (aperture), and c is the circle of confusion — the largest blur spot the eye perceives as a sharp point, which depends on sensor size and viewing conditions. Focusing exactly at H puts the near edge of acceptable sharpness at roughly H/2, so everything from there to infinity falls within depth of field.

Landscape and architectural photographers use hyperfocal focusing to get front-to-back sharpness — say, from a foreground rock to a distant mountain — in a single exposure without stopping down to extremes that introduce diffraction softness. It's a staple technique taught alongside depth-of-field theory, and lets a photographer set focus once by distance markings or a quick calculation rather than guessing or relying on autofocus hunting near infinity.

Was this helpful?

You can pick up to 3 reactions.

Comments (0)

  • Be the first to comment.

Popular calculators

Loan Calculator

Monthly payment, total interest and full amortization schedule.

Percentage Calculator

Percent change, percent of, and ratio calculations.

Discount Calculator

Calculate final price, savings, and discount amount.

BMI Calculator

Body mass index from height and weight (metric or imperial).

Age Calculator

Compute your exact age in years, months and days from a birth date.

Compound Interest Calculator

Calculate the final amount and interest earned with compounding.

All Calculators