Ilford Delta 400 Black and White Negative Film (120 Roll Film) - Manual (Page 2)

Page 2 of 7 Nov 2018
DELTA 400 PROFESSIONAL Technical Information
FILTER FACTORS
DELTA 400 Professional film may 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 1 ½ stops.
MAKING LONG EXPOSURES
For exposures between ½ and 1/10 000 second, no
adjustments are needed for reciprocity law failure.
When exposures longer than ½ 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 metered time is known.
The graph is based on the formulae Ta = Tm 1.41
Ta = Adjusted Time
Tm = Metered Time
CHOOSING THE BEST ILFORD DEVELOPER FOR THE JOB
Manual processing Spiral tank, dish/tray, deep tank
Including rotary processors
Liquid Powder
Best overall image
quality ILFOTEC DD-X ID-11 (stock)
Finest grain
Finest grain (EI 200/24)
ILFOTEC DD-X
ILFOTEC DD-X
ID-11 (stock)
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)
One-shot convenience ILFOSOL S (1+14)
ILFOTEC LC29 (1+29) ID-11 (1+3)
MICROPHEN (1+3)
Replenishable ILFOTEC DD-X ID-11
Machine Processing
Dip and dunk ILFOTEC DD Best overall image quality and long tank life
Short leader ILFOTEC RT RAPID Rapid processing, best overall image quality and
long tank life.
Roller transport ILFOTEC RT RAPID Rapid processing