curl --request POST \
  --url https://api.iotools.cloud/v1/tool/photography-exposure-value-calculator \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "aperture": "16",
  "shutter": "1/125",
  "iSO": "100"
}
'

{
  "tool": "photography-exposure-value-calculator",
  "tool_version": "1.0.1",
  "outputs": {
    "headline": "EV 14.97 at ISO 100 (EV100 14.97)",
    "summary": [
      {
        "property": "Exposure Value (EV) at ISO 100",
        "value": "14.97"
      },
      {
        "property": "Exposure Value at ISO 100 (EV100)",
        "value": "14.97"
      },
      {
        "property": "Closest lighting condition",
        "value": "EV 15 — Sunny (Sunny 16)"
      }
    ],
    "equivalents": [
      {
        "aperture": "f/2",
        "shutter": "1/8000 s",
        "depth-of-field": "Very shallow depth of field"
      },
      {
        "aperture": "f/2.8",
        "shutter": "1/4000 s",
        "depth-of-field": "Shallow depth of field"
      },
      {
        "aperture": "f/4",
        "shutter": "1/2000 s",
        "depth-of-field": "Shallow depth of field"
      },
      {
        "aperture": "f/5.6",
        "shutter": "1/1000 s",
        "depth-of-field": "Balanced depth of field"
      },
      {
        "aperture": "f/8",
        "shutter": "1/500 s",
        "depth-of-field": "Balanced depth of field"
      },
      {
        "aperture": "f/11",
        "shutter": "1/250 s",
        "depth-of-field": "Deep depth of field"
      },
      {
        "aperture": "f/16 (your aperture)",
        "shutter": "1/125 s",
        "depth-of-field": "Deep depth of field"
      },
      {
        "aperture": "f/22",
        "shutter": "1/60 s",
        "depth-of-field": "Very deep depth of field / diffraction risk"
      },
      {
        "aperture": "f/32",
        "shutter": "1/30 s",
        "depth-of-field": "Very deep depth of field / diffraction risk"
      }
    ]
  },
  "credits_used": 3,
  "credits_remaining": null
}