← The evidence ledger
Evidence row 2201253
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://photo-calc.x402tookit.com/depth-of-field
- Recorded
- Previous row
- None: the first of its kind about this subject
- Body SHA-256
- f22d0d45fdbb4041741c07a7a483ee0f1050479c3ff381c344df098ea05f258c
- Leaf
- 0x7b83859ad4f8b5b80a5f32ddc049ca8a3fe707be3fa319936d12fce8e118119a
What was observed
{
"endpoints": [
[
"x402",
"https://photo-calc.x402tookit.com/depth-of-field"
]
],
"name": "Photography Calculators",
"owner_address": "0xb531320805c5bed1d46aeadcf4f008fdf172dbda",
"raw": {
"accepts": [
{
"amount": "20000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
"transactionVersions": [
0
]
},
"maxTimeoutSeconds": 300,
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"payTo": "DUPiupXtuox38dcGoXUKer5mAydCzmaHjrbQ66qeEm8s",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:137",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
},
{
"amount": "20000",
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:42161",
"payTo": "0xb531320805C5BED1D46AEaDcF4F008FDF172DBDa",
"scheme": "exact"
}
],
"description": "Depth of field from focal length, aperture, distance and sensor: near and far limits, total depth and hyperfocal distance.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {
"aperture": 8,
"cocMm": 0.03,
"distanceM": 3,
"focalMm": 50,
"sensor": "full-frame"
},
"type": "http"
},
"output": {
"example": {
"aperture": 8,
"asOf": "2026-10-11T08:40:14.251Z",
"behindSubjectM": 1.18527,
"cocMm": 0.03,
"degraded": false,
"disclaimer": "Screening signal computed from the named public source. Not financial, legal or investment advice; provided as is. Verify at the source before acting.",
"farLimitIsInfinity": false,
"farLimitM": 4.18527,
"focalMm": 50,
"focusDistanceM": 3,
"hyperfocalM": 10.4667,
"inFrontOfSubjectM": 0.662095,
"nearAtHyperfocalM": 5.23333,
"nearLimitM": 2.33791,
"notChecked": [
"diffraction softening at small apertures (it limits sharpness before the geometric depth of field does)",
"the viewing size and distance assumed by the circle of confusion",
"…1 more"
],
"reasons": [
"Focus at the hyperfocal distance (10.47 m) to keep everything from 5.23 m to infinity sharp.",
"Circle of confusion 0.03 mm; a smaller value (stricter sharpness) shrinks the depth of field."
],
"sensor": "full-frame",
"source": "computed locally",
"summary": "50 mm at f/8, focused at 3 m on full frame: sharp from 2.338 m to 4.185 m (1.85 m deep); hyperfocal 10.47 m.",
"totalDepthM": 1.84736,
"verdict": "COMPUTED"
},
"type": "json"
}
},
"schema": {
"$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",
"type": "number"
},
"cocMm": {
"description": "Circle of confusion in mm (default sensor diagonal / 1500)",
"type": "number"
},
"distanceM": {
"description": "Focus distance in metres",
"type": "number"
},
"focalMm": {
"description": "Actual focal length in mm",
"type": "number"
},
"sensor": {
"description": "full-frame (default), aps-c, aps-c-canon, aps-h, micro-four-thirds, 1-inch or medium-format-44x33",
"type": "string"
}
},
"required": [
"focalMm",
"aperture",
"distanceM"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"aperture": {
"type": [
"null",
"number"
]
},
"asOf": {
"type": [
"null",
"string"
]
},
"behindSubjectM": {
"type": [
"null",
"number"
]
},
"cocMm": {
"type": [
"null",
"number"
]
},
"degraded": {
"type": [
"boolean",
"null"
]
},
"disclaimer": {
"type": [
"null",
"string"
]
},
"farLimitIsInfinity": {
"type": [
"boolean",
"null"
]
},
"farLimitM": {
"type": [
"null",
"number"
]
},
"focalMm": {
"type": [
"null",
"number"
]
},
"focusDistanceM": {
"type": [
"null",
"number"
]
},
"hyperfocalM": {
"type": [
"null",
"number"
]
},
"inFrontOfSubjectM": {
"type": [
"null",
"number"
]
},
"nearAtHyperfocalM": {
"type": [
"null",
"number"
]
},
"nearLimitM": {
"type": [
"null",
"number"
]
},
"notChecked": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"reasons": {
"items": {
"type": "string"
},
"type": [
"array",
"null"
]
},
"sensor": {
"type": [
"null",
"string"
]
},
"source": {
"type": [
"null",
"string"
]
},
"summary": {
"type": [
"null",
"string"
]
},
"totalDepthM": {
"type": [
"null",
"number"
]
},
"verdict": {
"type": [
"null",
"string"
]
}
},
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-11-02T04:07:17.941Z",
"quality": {
"l30DaysTotalCalls": 2,
"l30DaysUniquePayers": 1,
"lastCalledAt": "2026-11-02T04:07:17.72Z"
},
"resource": "https://photo-calc.x402tookit.com/depth-of-field",
"serviceName": "Photography Calculators",
"tags": [
"photography",
"depth-of-field",
"hyperfocal",
"lens"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "Depth of field from focal length, aperture, distance and sensor: near and far limits, total depth and hyperfocal distance."
}What the leaf hashes
{"body":"f22d0d45fdbb4041741c07a7a483ee0f1050479c3ff381c344df098ea05f258c","id":2201253,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793646803061827,"prev":null,"subject":"x402_bazaar:https://photo-calc.x402tookit.com/depth-of-field","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (444186 rows).
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- Day root
- 0x78fecaabbe319e56f5c4b80fc02e2052e198ad24781da8832a475ff65f2002d1
- Chained
- 0xdc35957db5d1371ca382b9152878ffece28ec7c5cb4f98fd71ddb367f8b999b2
- Published
- On Arc Testnet, block 70432815: 0x56b814612eb2e3e544153df3e91e1f7199106d1e430c7d8c6b653feeb9ebe9af