ImageReasonFocus, Depth of Field, and Macro
Does my depth of field actually cover the eye plane?
Enter your focal length, aperture, distance, and a face-depth margin around the eye to see whether it fits inside the calculated depth of field.
Answer
Visualize
Calculate to see the face-depth slab against the focus interval.
Compare
| Aperture | Near | Far |
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Plan
Calculate a result to generate a copyable plan.
The margin question, not just the aperture
Portrait focus is often discussed as an aperture choice, but the useful question is whether the critical depth around the eye plane fits inside the depth of field you are willing to accept. Pose, camera angle, and distance can change that depth as much as a small aperture adjustment. This planner makes the margin visible without pretending it can see the subject or operate autofocus.
Enter a 30mm margin in front of and behind the chosen eye, then compare that 60mm critical depth with the calculated focus interval at 85mm, f/2, and two metres. Opening one stop shrinks the interval; stepping back or changing the pose can add margin. The result does not prove both eyes will be sharp, because focus error, movement, lens behaviour, and viewing conditions still matter. Test the actual pose.
This result models the values you entered. It cannot see the scene, verify focus or movement, predict camera-specific processing, or guarantee the final photograph. Use it as a stated starting point, then check the important subject area in a test frame or proof.
Make one controlled test with the important variable held constant. Inspect the subject detail, motion, highlights, and intended output, then adjust the setting that protects the priority you named.
FAQ
- What aperture keeps both eyes sharp?
- There is no universal aperture. Eye depth, pose, distance, focal length, focus placement, and output criterion all matter.
- Is this a guarantee?
- No. The result is bounded by the inputs and assumptions shown on the page. It is designed to support a better next decision, not replace a test, measurement, proof, or professional judgement where one is needed.