Delta 400 metrage 30,5 m black and white negative film, ILFORD
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The new emulsion technology of layered silver halide flat crystals has enabled a significant change in the conventional ratio between sensitivity, resolution, grain size and speed of development. This has enabled the development of ISO 400/27° film that has comparable properties to other ISO 100/21° films. At optimum exposure, it provides a very rich range of halftones and faithful drawing in both highlights and shadows. DELTA 400 Professional is rated at ISO 400/27°. While its exposure flexibility is not the greatest of ILFORD films, it provides excellent results even at exposures such as ISO 200/24° and 800/30°. Processing is possible in all common ways and in all ILFORD baths. ILFOTEC HC, ILFOTEC LC 29, DDX and ID-11 are ideal developers.
| liquid | powder | |
| Best overall image quality | ILFOTEC DD-X | ID-11 (stock) |
| Finest grain EI 100/21 | ILFOTEC DD-X | ID-11 (stock) |
| Finest grain EI 50/18 | ILFOTEC DD-X | PERCEPTOL (stock) |
| Maximum Sharpness | ILFOSOL 3 (1+9) | ID-11 (1+3) |
| Maximum Film Speed EI 3200/36 | ILFOTEC DD-X | MICROPHEN (stock) |
| Economy | ILFOTEC LC29 (1+29) | ID-11 (1+3) MICROPHEN (1+3) |
