Development time
AgfaPhoto (Lupus Imaging) AgfaPhoto APX 400 (2013-) in ADOX Atomal 49
10:30 at 20°C (68°F), stock dilution, box speed.
Start timer · 10:30- Time
- 10:30
- Dilution
- Stock
- Temperature
- 20°C
- Box speed
- ISO 400
Standard
68°F
B&W
All 2 times
| Dilution | EI | Time | Temp | Agitation | Evidence | Timer |
|---|---|---|---|---|---|---|
| Stock | 400 | 10:30 | 20°C / 68°F | Standard | ManufacturerChecked Oct 2026 | Start timer |
| 1+2 | 320−⅓ stop | 25:00 | 20°C / 68°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 |
|---|---|---|---|---|---|---|
| 13:08 | 11:46 | 10:30 | 9:27 | 8:24 | 7:34 | 6:50 |
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 |
| 1+2 | 100 ml developer + 200 ml water | 167 ml developer + 333 ml water |
How they work together
- AgfaPhoto (Lupus Imaging) AgfaPhoto APX 400 (2013-)
- Budget panchromatic 400 film under the AgfaPhoto name; described as similar to Kentmere Pan 400.
- Notes on this pairing
- Datasheet names ADOX Atomal. Tank: first minute continuous, then one inversion every 30 s.
- Datasheet names ADOX Atomal and recommends EI 320 for this row. Tank: first minute continuous, then one inversion every 30 s.