ILFORD DELTA 400 PROFESSIONAL is a fast, fine
grain, black and white professional film. It is ideal
for action and available light photography, and
also gives fine grain results for pictorial and fine
art photography. DELTA 400 Professional film
gives excellent performance in seasoned
developers.
Although rated at ISO 400/27º, DELTA 400
Professional film can produce high quality prints
when exposed at meter settings up to EI 3200/36
and given extended development in ILFORD
ILFOTEC DD-X, ILFOTEC HC, MICROPHEN or
ILFOTEC RT RAPID developers.

EXPOSURE RATING
DELTA 400 Professional has a speed rating of ISO
400/27° (400ASA, 27DIN, EI 400/27) to
daylight. The ISO speed rating was measured
using ILFORD ID-11 developer at 20°C/68°F with
intermittent agitation in a spiral tank.
Best results will be obtained at normal contrast,
but good image quality will also be obtained at
meter settings from EI 200/24 to EI 3200/36.
It should be noted that the exposure index (EI)
range recommended for DELTA 400 Professional is
based on a practical evaluation of film speed and
is not based on foot speed, as is the ISO
standard.

FILTER FACTORS
DELTA 400 Professional film can be used with all
types of filters (eg colour, polarising and neutral
density filters) in the usual way. Follow the
instructions given by the filter manufacturer.
The exposure increase in daylight may vary with
the angle of the sun and the time of day. In the
late afternoon or the winter months, when daylight
contains more red light, green and blue filters may
need slightly more exposure than usual.
Cameras with through-the-lens metering will usually
adjust the exposure automatically when using
filters. With some automatic exposure cameras,
the correction given for deep red and orange
filters can produce negatives under exposed by as
much as 11/2 stops.

MAKING LONG EXPOSURES
For exposures between 1/2 and 1/10 000
second, no adjustments are needed for
reciprocity law failure. When exposures
longer than 1/2 second are given, DELTA 400
Professional, along with other films, needs to
be given more exposure than indicated by a
meter. Use the graph to calculate the
increased exposure time which should be
given once the measured time is known.


GUARANTEE

Focilux guarantees that all articles are supplied by OFFICIAL BELGIAN and DUTCH importers.
This implies that all cameras carry a European legal guarantee.
As a rule, Dutch, French and English manuals are delivered with every camera, printer, scanner or other material.
If this is not the case, a manual can be ordered and delivered immediately.