Discover / photo-calc.x402tookit.com

Photography Calculators

■ Challenge detected

Crop factor of a sensor, with the full-frame equivalent focal length, aperture and ISO for a lens, or a custom sensor size.

Listed price
$0.02
Challenge detected
1 of the last check
Median response
1726 ms
Last checked
21 Oct, 00:26 UTC
In our index since
21 Oct 2026

Endpoint

curl -i https://photo-calc.x402tookit.com/crop-factor
# 402 Payment Required: pay with an x402 client (USDC on Arbitrum),
# then send the same request again with the payment attached.
11 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://photo-calc.x402tookit.com

  • GET/nd-filterNo price listedND filter maths: convert between ND factor, stops and optical density, and get the new shutter time with the filter on.
  • GET/exposure-valueNo price listedExposure value (EV) from aperture, shutter speed and ISO, the light level it suits, and equivalent aperture and shutter pairs.
  • GET/field-of-viewNo price listedHorizontal, vertical and diagonal angle of view for a lens and sensor, and the width and height of scene covered at a distance.
  • GET/sunny-16No price listedThe sunny-16 rule: starting aperture and shutter speed for sun, cloud or shade at your ISO, with the exposure value it implies.
  • GET/print-sizeNo price listedPrint size from image pixels at a DPI, or the pixels and megapixels needed for a print size; with viewing-distance advice.
  • GET/timelapse-calcNo price listedTime-lapse planner: give any two of interval, shooting time and clip length to get the rest, frame count and storage.
  • GET/exposure-tradeNo price listedHold exposure constant: change one setting (aperture, shutter or ISO) and get the other two compensations, in stops.
  • GET/crop-factorNo price listedCrop factor of a sensor, with the full-frame equivalent focal length, aperture and ISO for a lens, or a custom sensor size.
  • GET/shutter-ruleNo price listedMinimum handheld shutter speed (reciprocal rule) and the longest star-point exposure by the 500 rule and the NPF rule.
  • GET/depth-of-fieldNo price listedDepth of field from focal length, aperture, distance and sensor: near and far limits, total depth and hyperfocal distance.
  • GET/flash-guide-numberNo price listedFlash guide-number maths: range for an aperture and ISO, or the aperture needed for a distance, in metres and feet.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 11 of 11 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/photo-calc.x402tookit.com

Recent checks

21 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.21 Oct 2026
All 1 checks
When (UTC)ResultHTTPResponse
21 Oct, 00:26 UTCChallenge detected4021726ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 21 Oct, 00:26 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for Photography Calculators?

Its listed price is $0.02.

What payment terms does Photography Calculators advertise?

The listing advertises x402, Arbitrum, Base, Polygon, Solana and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is Photography Calculators listed?

In x402 Bazaar. Superstables first indexed it on 21 Oct 2026.

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