Ilford
Modern monochrome style with fine grain and high sharpness
现代单色风格，细腻颗粒，高清晰度
Specifications
ISO
400
Type
Black & White
Process
B&W
Brand Color
#4A4A4A
Reciprocity Failure Compensation
Long exposures require compensation for reciprocity failure. Use these values as a starting point when shooting with . For more details, see our Reciprocity Failure Guide. FilmMeter's Light Metering feature can automatically apply these corrections.
Official DataIlford P Factor Formula
This film uses the Ilford reciprocity formula: Corrected Time = Metered TimeP, where P = 1.41.
| Metered Time | Corrected Time | Difference (approx.) |
|---|---|---|
| 1s | 1s | 1.0x |
| 2s | 2.7s | 1.35.35.0x |
| 5s | 10s | 2.0x |
| 10s | 26s | 2.60x |
| 20s | 1m 8s | 3.40x |
| 30s | 1m 57s | 3.90x |
| 1m 0s | 5m 10s | 5.16x |
| 2m 0s | 13m 50s | 6.91x |
Data sourced from official manufacturer documentation.