FILM Ferrania Orto in Diafine

EI is the speed the film was rated at when shooting. Evidence says where each time comes from: the manufacturer’s own data, a named test, a compilation or several agreeing reports (community consensus), or one person’s report. Times marked “not yet verified” come from secondary sources and haven’t been checked against a manufacturer datasheet. Where sources give different times, every one is listed and marked “sources differ”.

Calculated from the 21°C (70°F) time using Ilford’s temperature compensation factors, not taken from a datasheet. Most B&W developers behave well between 18–24°C (64–75°F).

Diafine

Fine grain, high acutance, normal contrast. Wide exposure latitude with fixed contrast (Acufine).

FILM Ferrania Orto

Orthochromatic version of the P30 cine-derived emulsion (2023), with high silver content and strong contrast; development close to P30.

Notes on this pairing

• 3 min in each bath (3 + 3). Gives a slight speed increase to EI 64 to 80. User-feedback guide. Ferrania publishes these as times collected from user feedback, not its own tests.

• 510-Pyro

  60:00

  1+500 · EI 50 · 21°C

• D-76

  8:00

  Stock · EI 50 · 20°C · 2 variants

• HC-110

  30:00

  1+119 · EI 50 · 20°C

• Rodinal

  14:00

  1+50 · EI 50 · 20°C

• Kodak Tri-X 400

  6:00

  Stock · EI 1600 · 20°C

• Kodak T-Max 400

  6:00

  Stock · EI 500 · 20°C · 2 variants

• Ilford HP5 Plus

  6:00

  Stock · EI 800 · 20°C · 2 variants

• Ilford FP4 Plus

  6:00

  Stock · EI 250 · 20°C

• Kodak T-Max 100

  6:00

  Stock · EI 160 · 20°C · 3 variants

• Ilford Pan F Plus 50

  6:00

  Stock · EI 80 · 20°C · 2 variants

• Foma Bohemia Fomapan 100 Classic

  6:00

  Stock · EI 200 · 20°C

• Street Candy Street Candy MTN 100

  6:00

  Stock · EI 100 · 20°C