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

1 Aperture (f-number) = 1.5 Equivalent aperture (f-number, DoF basis) · camera-equivalence calculation for APS-C Sony/Fuji 23.5mm

Direct Answer

On APS-C Sony/Fuji 23.5mm, f/5.6 corresponds to about f/8.4 on a full-frame depth-of-field basis

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

For 1.4 Aperture (f-number), this corresponds to 2.1 Equivalent aperture (f-number, DoF basis) on APS-C Sony/Fuji 23.5mm.

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1.5 Equivalent aperture (f-number, DoF basis)

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Explanation

Formula: equivalent_f = f_number x 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.

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 APS-C Sony/Fuji 23.5mm 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 (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

Aperture (f-number)	Equivalent aperture (f-number, DoF basis)
1.4	2.1
2	3
2.8	4.2
4	6
5.6	8.4
8	12
11	16.5
16	24

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

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

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