Equivalent aperture (f-number, DoF basis) to Aperture (f-number) for Compact 1/2.5" class
Snapshot
On Compact 1/2.5" class, a full-frame equivalent aperture of f/5.6 needs about f/0.823529. Conversion Encyclopedia keeps the same sensor profile across the calculator, common values, and reverse page for this page.
- Sensor profile: Compact 1/2.5" class (5.76 mm width, crop factor 6.8).
- Example: To match 1.4 Equivalent aperture (f-number, DoF basis), you need 0.205882 Aperture (f-number) on Compact 1/2.5" class.
- Use the reverse page if you need the opposite direction with the same basis.
Use the interactive calculator below for custom values and the common-value table for quick checks.
Interactive conversion
Converter Calculator
0.147059 Aperture (f-number)
SwitchMachine access
Available to apps and AI agents
Equivalent aperture (f-number, DoF basis) to Aperture (f-number) for Compact 1/2.5" class can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The compact-1-2-5 sensor profile tells the conversion engine which camera sensor setup belongs to the calculation.
Machine-readable identifiers
- Conversion family
camera-focal-equivalence- Source unit
full_frame_equivalent_f_number- Target unit
aperture_f_number- Sensor profile
compact-1-2-5
The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.
Example API request and response
POST /api/v1/convertRequest
{
"family": "camera-focal-equivalence",
"value": 1,
"from": "full_frame_equivalent_f_number",
"to": "aperture_f_number",
"parameters": {
"sensorProfile": "compact-1-2-5"
}
}Essential response
{
"ok": true,
"conversion": {
"family": "camera-focal-equivalence",
"value": 1,
"from": "full_frame_equivalent_f_number",
"to": "aperture_f_number",
"result": {
"raw": 0.14705882352941177,
"display": "0.147059"
},
"canonicalPath": "/camera-focal-equivalence/full-frame-equivalent-f-number-to-aperture-f-number-at-compact-1-2-5/"
}
}Explanation
Formula: f_number = equivalent_f / 6.8. Why: this page keeps Compact 1/2.5" class fixed, so crop factor and sensor width stay explicit for every calculation.
Compact 1/2.5" class: a sensor profile with crop factor 6.8 and sensor width (horizontal) 5.76 mm, used as the fixed framing basis for this page.
Equivalent aperture (f-number, DoF basis): a camera-equivalence quantity in this family that depends on the selected crop model.
Aperture (f-number): a camera-equivalence quantity in this family that depends on the selected crop model.
This route is useful when you know the full-frame depth-of-field equivalent and need the actual aperture on Compact 1/2.5" class.
This page is sensor-profile dependent rather than universal because camera equivalence changes with sensor geometry (Compact 1/2.5" class).
Common Conversion Values
| Equivalent aperture (f-number, DoF basis) | Aperture (f-number) |
|---|---|
| 1.4 | 0.205882 |
| 2 | 0.294118 |
| 2.8 | 0.411765 |
| 4 | 0.588235 |
| 5.6 | 0.823529 |
| 8 | 1.176471 |
| 11 | 1.617647 |
| 16 | 2.352941 |
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 Compact 1/2.5" class, crop factor 6.8, sensor width 5.76 mm.
How do I reverse eq f to f for Compact 1/2.5" class?
Use the opposite-direction page for Compact 1/2.5" 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.