Development time
Fujifilm Neopan 400 Professional in Microphen
4:15 at 20°C (68°F), stock dilution, box speed.
Start timer · 4:15- Time
- 4:15
- Dilution
- Stock
- Temperature
- 20°C
- Box speed
- ISO 400
All 8 times
| Dilution | EI | Time | Temp | Agitation | Evidence | Timer |
|---|---|---|---|---|---|---|
| Stock | 400 | 4:15 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| Stock | 400 | 3:00 | 24°C / 75°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| Stock | 800+1 stop | 5:45 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| Stock | 800+1 stop | 4:15 | 24°C / 75°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| Stock | 1600+2 stops | 8:30 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| Stock | 1600+2 stops | 6:15 | 24°C / 75°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| Stock | 3200+3 stops | 16:00 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| Stock | 3200+3 stops | 11:45 | 24°C / 75°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
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”.
Other temperatures
| 18°C64°F | 19°C66°F | 20°C68°F | 21°C70°F | 22°C72°F | 23°C73°F | 24°C75°F |
|---|---|---|---|---|---|---|
| 5:19 | 4:46 | 4:15 | 3:50 | 3:24 | 3:04 | 2:46 |
Calculated from the 20°C (68°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).
Mixing
| Dilution | 300 ml (10.1 fl oz) (one 35mm roll) | 500 ml (16.9 fl oz) (one 120 roll) |
|---|---|---|
| Stock | Use as mixed, undiluted | Use as mixed, undiluted |
How they work together
- Microphen
- Fine grain, moderate acutance, normal contrast. Fine grain with an effective speed increase.
- Fujifilm Neopan 400 Professional
- Professional monosize cubic-grain 400 B&W film (Presto in Japan), produced from 1978.
- Notes on this pairing
- Fujifilm small-tank table (Neopan 400 Presto 135); continuous agitation for the first minute, then 5 s every minute. Microphen, dilution not stated, taken as stock.
- Fujifilm small-tank table (Neopan 400 Presto 135); continuous agitation for the first minute, then 5 s every minute. One-stop push. Microphen, dilution not stated, taken as stock.
- Fujifilm small-tank table (Neopan 400 Presto 135); continuous agitation for the first minute, then 5 s every minute. Two-stop push. Microphen, dilution not stated, taken as stock.
- Fujifilm small-tank table (Neopan 400 Presto 135); continuous agitation for the first minute, then 5 s every minute. Three-stop push. Microphen, dilution not stated, taken as stock.
Neopan 400 Professional in other developers
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