Equivalent aperture (f-number, DoF basis) to Aperture (f-number) for Action camera 1/2.3" class

1 Equivalent aperture (f-number, DoF basis) = 0.178571 Aperture (f-number) · camera-equivalence calculation for Action camera 1/2.3" class

Direct Answer

On Action camera 1/2.3" class, a full-frame equivalent aperture of f/5.6 needs about f/1

This result uses the fixed Action camera 1/2.3" class sensor profile (crop factor 5.6).

To match 1.4 Equivalent aperture (f-number, DoF basis), you need 0.25 Aperture (f-number) on Action camera 1/2.3" class.

Converter Calculator

0.178571 Aperture (f-number)

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Explanation

Formula: f_number = equivalent_f / 5.6. Why: this page keeps Action camera 1/2.3" class fixed, so crop factor and sensor width stay explicit for every calculation.

Action camera 1/2.3" class: a sensor profile with crop factor 5.6 and sensor width (horizontal) 6.4 mm, used as the fixed framing basis for this page.

Equivalent aperture (f-number, DoF basis): a camera-equivalence quantity in this family that depends on the selected crop model.

Aperture (f-number): a camera-equivalence quantity in this family that depends on the selected crop model.

This route is useful when you know the full-frame depth-of-field equivalent and need the actual aperture on Action camera 1/2.3" class.

This page is sensor-profile dependent rather than universal because camera equivalence changes with sensor geometry (Action camera 1/2.3" class).

Method & Sensor Profile

Model basis: Action camera 1/2.3" class sensor profile with crop factor 5.6 and sensor width 6.4 mm.
Profile reference: Action camera 1/2.3" class (crop factor 5.6, sensor width 6.4 mm).
Consistency rule: forward and reverse pages keep the same sensor profile; only the formula direction changes.

Common Conversion Values

Equivalent aperture (f-number, DoF basis)	Aperture (f-number)
1.4	0.25
2	0.357143
2.8	0.5
4	0.714286
5.6	1
8	1.428571
11	1.964286
16	2.857143

Frequently Asked Questions

Which sensor assumptions are fixed for full-frame equivalent f-number to aperture f-number?

Full-frame equivalent f-number to aperture f-number is fixed to Action camera 1/2.3" class, crop factor 5.6, sensor width 6.4 mm.

How do I reverse eq f to f for Action camera 1/2.3" class?

Use the opposite-direction page for Action camera 1/2.3" class to convert aperture (f-number) back to equivalent aperture (f-number, dof basis) with the same sensor assumptions.

Can full-frame equivalent f-number to aperture f-number replace full lens-design simulation?

No. Full-frame equivalent f-number to aperture f-number provides framing and geometry approximations, not full optical-model behavior.

Does equivalent f-number change exposure?

No. Equivalent f-number here is for depth-of-field comparison only. Exposure (light transmission) does not change.