Full-frame equivalent f-number to aperture f-number at Smartphone 1/1.7" class

1 Equivalent aperture = 0.21978 Aperture · profile-dependent conversion · context: sensor profile

Direct Answer

1 Equivalent aperture equals 0.21978 Aperture

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

For 2 Equivalent aperture, this profile returns 0.43956 Aperture.

Converter Calculator

1 Equivalent aperture (f-number, DoF basis) =
0.21978 Aperture (f-number)

Explanation

Smartphone 1/1.7" class uses crop factor 4.55 and sensor width 7.9 mm. f_number = equivalent_f / 4.55. For input 1 eq f, output is 0.21978021978 f.

For Equivalent aperture to Aperture, the active sensor profile determines the conversion constants applied to every value.

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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 0.21978
2 0.43956
5 1.098901
10 2.197802
14 3.076923
18 3.956044
24 5.274725
35 7.692308
50 10.989011
85 18.681319
100 21.978022
135 29.67033
200 43.956044