Exposure value (EV) from aperture, shutter speed and ISO, the light level it sui
Exposure value (EV) from aperture, shutter speed and ISO, the light level it suits, and equivalent aperture and shutter pairs.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
444 msmedian answer time
$0.02listed price per call
$0.02price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://photo-calc.x402tookit.com/exposure-value
| Category | Image and media |
|---|---|
| Provider host | photo-calc.x402tookit.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.02 | 444 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"aperture": 8,
"iso": 100,
"shutter": "1/125"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"aperture": {
"description": "f-number, e.g. 8",
"type": "number"
},
"iso": {
"description": "ISO (default 100)",
"type": "number"
},
"shutter": {
"description": "Shutter time such as 1/125 or 0.5",
"type": "string"
}
},
"required": [
"aperture",
"shutter"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"aperture": {
"type": [
"null",
"number"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"equivalentPairsAtSameIso": {
"items": {
"properties": {
"aperture": {
"type": [
"null",
"number"
]
},
"exactShutterS": {
"type": [
"null",
"number"
]
},
"nearestStandardShutter": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": [
"array",
"null"
]
},
"ev100": {
"type": [
"null",
"number"
]
},
"evAtIso": {
"type": [
"null",
"number"
]
},
"iso": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"shutterS": {
"type": [
"null",
"number"
]
},
"source": {
"type": [
"null",
"string"
]
},
"suitsLight": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}