Full-frame equivalent f-number to aperture f-number at APS-C Sony/Fuji 23.5mm

1 Equivalent aperture = 0.666667 Aperture · profile-dependent conversion · context: sensor profile

Direct Answer

1 Equivalent aperture equals 0.666667 Aperture

This result depends on the selected profile context: sensor profile.

For 2 Equivalent aperture, this profile returns 1.333333 Aperture.

Converter Calculator

1 Equivalent aperture (f-number, DoF basis) =
0.666667 Aperture (f-number)

Explanation

APS-C Sony/Fuji 23.5mm uses crop factor 1.5 and sensor width 23.5 mm. f_number = equivalent_f / 1.5. For input 1 eq f, output is 0.666666666667 f.

From Equivalent aperture to Aperture, results depend on the selected sensor profile and stay consistent with that profile across table rows and calculator input.

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Keep the same profile in both directions to avoid mixing lookup systems that use different size mappings.

Method & Reference (Verified)

  • Method basis: profile-bound mapping; constants depend on the selected profile encoded in the route.
  • Profile reference: sensor profile.
  • Consistency rule: keep the same profile in mirror direction to avoid mixing incompatible mappings.

Common Conversion Values

Equivalent aperture (f-number, DoF basis)Aperture (f-number)
1 0.666667
2 1.333333
5 3.333333
10 6.666667
14 9.333333
18 12
24 16
35 23.333333
50 33.333333
85 56.666667
100 66.666667
135 90
200 133.333333