Equivalent aperture (f-number, DoF basis) to Aperture (f-number) for APS-C Sony/Fuji 23.5mm

1 Equivalent aperture (f-number, DoF basis) = 0.666667 Aperture (f-number) · camera-equivalence calculation for APS-C Sony/Fuji 23.5mm

Direct Answer

On APS-C Sony/Fuji 23.5mm, a full-frame equivalent aperture of f/5.6 needs about f/3.733333

This result uses the fixed APS-C Sony/Fuji 23.5mm sensor profile (crop factor 1.5).

To match 1.4 Equivalent aperture (f-number, DoF basis), you need 0.933333 Aperture (f-number) on APS-C Sony/Fuji 23.5mm.

Converter Calculator

0.666667 Aperture (f-number)

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Explanation

Formula: f_number = equivalent_f / 1.5. Why: this page keeps APS-C Sony/Fuji 23.5mm fixed, so crop factor and sensor width stay explicit for every calculation.

APS-C Sony/Fuji 23.5mm: a sensor profile with crop factor 1.5 and sensor width (horizontal) 23.5 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 APS-C Sony/Fuji 23.5mm.

This page is sensor-profile dependent rather than universal because camera equivalence changes with sensor geometry (APS-C Sony/Fuji 23.5mm).

Method & Sensor Profile

Model basis: APS-C Sony/Fuji 23.5mm sensor profile with crop factor 1.5 and sensor width 23.5 mm.
Profile reference: APS-C Sony/Fuji 23.5mm (crop factor 1.5, sensor width 23.5 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	0.933333
2	1.333333
2.8	1.866667
4	2.666667
5.6	3.733333
8	5.333333
11	7.333333
16	10.666667

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 APS-C Sony/Fuji 23.5mm, crop factor 1.5, sensor width 23.5 mm.

How do I reverse eq f to f for APS-C Sony/Fuji 23.5mm?

Use the opposite-direction page for APS-C Sony/Fuji 23.5mm 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.