Aperture (f-number) to Equivalent aperture (f-number, DoF basis) for Compact 1/2.5" class

Snapshot

On Compact 1/2.5" class, f/5.6 corresponds to about f/38.08 on a full-frame depth-of-field basis. Conversion Encyclopedia keeps the same sensor profile across the calculator, common values, and reverse page for this page.

Sensor profile: Compact 1/2.5" class (5.76 mm width, crop factor 6.8).
Example: For 1.4 Aperture (f-number), this corresponds to 9.52 Equivalent aperture (f-number, DoF basis) on Compact 1/2.5" class.
Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Converter Calculator

6.8 Equivalent aperture (f-number, DoF basis)

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Explanation

Formula: equivalent_f = f_number x 6.8. Why: this page keeps Compact 1/2.5" class fixed, so crop factor and sensor width stay explicit for every calculation.

Compact 1/2.5" class: a sensor profile with crop factor 6.8 and sensor width (horizontal) 5.76 mm, used as the fixed framing basis for this page.

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

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

This route is useful when you know the actual lens aperture on Compact 1/2.5" class and want the full-frame depth-of-field equivalent.

This page is sensor-profile dependent rather than universal because camera equivalence changes with sensor geometry (Compact 1/2.5" class).

Method & Sensor Profile

Sensor basis: Compact 1/2.5" class profile with crop factor 6.8 and sensor width 5.76 mm.
Profile reference: focal-length and aperture equivalence use the same crop model, while angle-of-view routes use the same fixed sensor width geometry.
Consistency rule: forward and reverse pages keep the same sensor profile; only the formula direction changes.

Common Conversion Values

Aperture (f-number)	Equivalent aperture (f-number, DoF basis)
1.4	9.52
2	13.6
2.8	19.04
4	27.2
5.6	38.08
8	54.4
11	74.8
16	108.8

Frequently Asked Questions

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

Aperture f-number to full-frame equivalent f-number is fixed to Compact 1/2.5" class, crop factor 6.8, sensor width 5.76 mm.

How do I reverse f to eq f for Compact 1/2.5" class?

Use the opposite-direction page for Compact 1/2.5" class to convert equivalent aperture (f-number, dof basis) back to aperture (f-number) with the same sensor assumptions.

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

No. Aperture f-number to full-frame equivalent 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.