How to use this tool
- Enter focal length, f-number, circle of confusion.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
The method, explained
Hyperfocal distance = [focal length²/(f-number × circle of confusion) + focal length]/1000 meters.
Using focal length = 50 mm, f-number = 8, circle of confusion = 0.03 mm, the result is 10.4666667 m. Change these example inputs to match your task; use the method above to check each step.
What to keep in mind
The circle of confusion is a chosen sharpness criterion, not a universal sensor constant. An ideal geometric or exposure estimate. Lens behavior, stabilization, sensor crop and scene conditions may change practical results.
Common questions
Which inputs does this calculation need?
Estimate hyperfocal focus distance using a chosen circle of confusion. Enter focal length in mm, f-number, circle of confusion in mm. The filled example is editable and is not a saved personal record.
How should I interpret the result?
The circle of confusion is a chosen sharpness criterion, not a universal sensor constant. An ideal geometric or exposure estimate. Lens behavior, stabilization, sensor crop and scene conditions may change practical results.
Methodology maintained by ClarityKit. How these tools are built and checked.