Full-frame equivalent f-number to aperture f-number at Compact 1/2.5" class

1 Equivalent aperture = 0.147059 Aperture · profile-dependent conversion · context: sensor profile

Direct Answer

1 Equivalent aperture equals 0.147059 Aperture

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

For 2 Equivalent aperture, this profile returns 0.294118 Aperture.

Converter Calculator

1 Equivalent aperture (f-number, DoF basis) =
0.147059 Aperture (f-number)

Explanation

Compact 1/2.5" class uses crop factor 6.8 and sensor width 5.76 mm. f_number = equivalent_f / 6.8. For input 1 eq f, output is 0.147058823529 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 0.147059
2 0.294118
5 0.735294
10 1.470588
14 2.058824
18 2.647059
24 3.529412
35 5.147059
50 7.352941
85 12.5
100 14.705882
135 19.852941
200 29.411765