What you can do here

Browse filmsBy maker, type, box speed and format, each with its datasheet values.
Development timesEvery film in your developer: dilution, EI and temperature, from the datasheet.
Reciprocity calculatorLong exposures worked out from each film's own table or formula.
Cost per shotWhat a roll and every frame cost: cheapest roll plus lab developing, in your country.
Lab pricesWhat labs charge to develop a roll of C-41, B&W, E-6 or ECN-2.
Which stock is it?Rebranded and cine-derived films, and what they're made from.
Shop pricesToday's price per roll across European, UK and US shops.

75 films so far

Lomography 17Babylon Kino B&W 13 · Berlin Kino B&W 400 · Color Negative 100 · Color Negative 400 · Color Negative 800 · Earl Grey B&W 100 · Fantôme Kino B&W 8 · Lady Grey B&W 400 · Lobster Redscale 110 · LomoChrome Metropolis · LomoChrome Purple · LomoChrome Turquoise · Orca B&W 100 · Peacock X-Pro Slide 110 · Potsdam Kino B&W 100 · Redscale XR 50-200 · Tiger Color Negative 110
Ilford · Kentmere · Harman 13Ilford Delta 100 Professional · Ilford Delta 3200 Professional · Ilford Delta 400 Professional · Ilford FP4 Plus · Ilford HP5 Plus · Kentmere Pan 100 · Kentmere Pan 200 · Kentmere Pan 400 · Ilford Ortho Plus · Ilford Pan F Plus · Harman Phoenix 200 · Ilford SFX 200 · Ilford XP2 Super
Kodak 11Ektar 100 · Gold 200 · Portra 160 · Portra 400 · Portra 800 · T-Max 100 · T-Max 400 · T-Max P3200 · Tri-X 320 · Tri-X 400 · Ultra Max 400
Foma 9Foma Cine Ortho 400 · Foma Ortho 400 · Fomapan 100 Classic · Fomapan 200 Creative · Fomapan 400 Action · Fomapan Cine 100 · Fomapan Cine 400 · Fomapan R · Retropan 320 Soft
Fujifilm 7Acros II · C200 · Pro 400H · Provia 100F · Superia X-TRA 400 · Velvia 100 · Velvia 50
Eastman · Kodak 6Eastman Double-X · Kodak Ektachrome E100 · Kodak Vision3 200T · Kodak Vision3 250D · Kodak Vision3 500T · Kodak Vision3 50D
CineStill 5400Dynamic · 50Daylight · 800Tungsten · BwXX · REDRUM
Candido 3Candido 200 Studio · Candido 400 Classic · Candido 800 Reserve
ADOX 1CMS 20 II
Bergger 1Pancro 400
Wolfen 1NC500
ORWO 1UN54

More films are added as datasheets are reviewed.

What it costs today

£15.99Carmarthen CamerasUKIn stock

Per roll, incl. VAT, excl. shipping. Each shop's own currency, not converted. Checked 30 Oct, 19:04 UTC. Line: last 30 days.

Everything about this film

curl /api/v1/films/candido-200/prices?format=135&exposures=36&country=GB

Build with the data

Everything above is also a free JSON API and an MCP server for AI assistants. Read-only, no key. Full reference with examples in five languages: API docs.

Ask for a film

curl /api/v1/films/kodak-portra-400

{
  "id": "kodak-portra-400",
  "name": "Portra 400",
  "speed": {
    "iso": 400,
    "din": 27,
    "dxCoded": true
  },
  "exposure": [
    {
      "light": "daylight",
      "filter": null,
      "ei": 400,
      "source": {
        "kind": "datasheet",
        "datasheet": {
          "code": "E-4050",
          "revision": "2016-02"
        }
      }
    }
  ],
  "processing": [
    "C-41"
  ],
  …
}

Endpoints

GET /api/v1/films: Search and filter: type, ISO range, process, maker, tag
GET /api/v1/films/:id: One film, every field with its source
GET /api/v1/films/:id/dev-times: Developer × dilution × EI × temperature
GET /api/v1/films/:id/curves: Characteristic and spectral curves as points
GET /api/v1/developers: Every developer with published times
GET /api/v1/films/:id/prices: Shop prices, cheapest per roll first; /history for 365 days
GET /api/v1/prices/deals: Offers well under their own 30-day median

Examples in JavaScript, Python, Ruby, PHP and curl, plus every parameter: API docs.

Ask an AI assistant

The same data as an MCP server. Add it once, then ask things like How long do I develop HP5 Plus at EI 1600 in DD-X? The assistant answers from the datasheet and names the source.

claude mcp add --transport http rolllog https://rolllog.io/mcp

{ "mcpServers": { "rolllog": { "type": "http", "url": "https://rolllog.io/mcp" } } }

Any MCP client that speaks Streamable HTTP works. Read-only, no key needed. Free for non-commercial use; commercial use needs a licence (terms).

search_films: Find films by name, type, ISO, process, maker or tag
get_film: Everything about one film, with sources. Aliases like RVP50 work
get_dev_times: Development times, filtered by developer, dilution or EI
list_developers: Every developer with published times
get_curves: Digitized curves, where available
get_prices: Today's shop prices for a film, cheapest per roll first
get_price_deals: Offers well under their own 30-day median