Camera Focal EquivalenceFull Frame Equivalent F Number to Aperture F Number At Smartphone 1 1 7

Equivalent aperture (f-number, DoF basis) to Aperture (f-number) for Smartphone 1/1.7" class

Snapshot

On Smartphone 1/1.7" class, a full-frame equivalent aperture of f/5.6 needs about f/1.230769. Conversion Encyclopedia keeps the same sensor profile across the calculator, common values, and reverse page for this page.

Sensor profile: Smartphone 1/1.7" class (7.9 mm width, crop factor 4.55).
Example: To match 1.4 Equivalent aperture (f-number, DoF basis), you need 0.307692 Aperture (f-number) on Smartphone 1/1.7" class.

Interactive conversion

Converter Calculator

Decimals: 1.5 or 1,5. Fractions: 1/2. Scientific notation: 1e3. Write 1000 without grouping separators.

0.21978 Aperture (f-number)

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API and AI agent access

Equivalent aperture (f-number, DoF basis) to Aperture (f-number) for Smartphone 1/1.7" class. sensor profile: smartphone-1-1-7.

Machine-readable identifiers

Conversion family: camera-focal-equivalence
Source unit: full_frame_equivalent_f_number
Target unit: aperture_f_number
Sensor profile: smartphone-1-1-7

Use these identifiers in the API request. Sources and model limits also apply to software clients.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "camera-focal-equivalence",
  "value": 1,
  "from": "full_frame_equivalent_f_number",
  "to": "aperture_f_number",
  "parameters": {
    "sensorProfile": "smartphone-1-1-7"
  }
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "camera-focal-equivalence",
    "value": 1,
    "from": "full_frame_equivalent_f_number",
    "to": "aperture_f_number",
    "result": {
      "raw": 0.21978021978021978,
      "display": "0.21978"
    },
    "canonicalPath": "/camera-focal-equivalence/full-frame-equivalent-f-number-to-aperture-f-number-at-smartphone-1-1-7/"
  }
}

API, OpenAPI and WebMCP documentation

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. Exposure does not change with this equivalence; the f-number still transmits the same light, and the equivalence here is depth-of-field framing only.

Method & Sensor Profile

Sensor basis: Smartphone 1/1.7" class profile with crop factor 4.55 and sensor width 7.9 mm.
Profile reference: focal-length and aperture equivalence use the same crop model, while angle-of-view routes use the same fixed sensor width geometry.
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	0.307692
2	0.43956
2.8	0.615385
4	0.879121
5.6	1.230769
8	1.758242
11	2.417582
16	3.516484

Questions & answers

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 Smartphone 1/1.7" class, crop factor 4.55, sensor width 7.9 mm.

How do I reverse eq f to f for Smartphone 1/1.7" class?

Use the opposite-direction page for Smartphone 1/1.7" class 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.