Technical Data Sheet

Page 2 of 6 No
v
2018
D
ELTA 100 PROFESSIONAL Technical Information
FILTER FACTORS
Delta 100 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 1½ stops.
MAKING LONG EXPOSURES
For exposures between 1 and 1/10 000 second, no
adjustments are needed for reciprocity law failure.
When exposures longer than 1 second are given, Delta 100
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.
The graph is based on the formulae Ta = Tm
1.26
Ta = Adjusted Time
Tm = Measured 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 (EI 100/21)
Finest grain (EI 50/18)
ILFOTEC DD-X
ILFOTEC DD-X
PERCEPTOL (1+1)
PERCEPTOL (stock)
Maximum sharpness ILFOTEC HC (1+31) ID-11 (1+3)
Maximum film speed
(EI 200/24)
ILFOTEC DD-X MICROPHEN (stock)
Economy ILFOTEC LC29 (1+29) ID-11 (1+3)
MICROPHEN (1+3)
One-shot convenience ILFOSOL 3 (1+14)
ILFOTEC DD-X
ID-11 (1+1)
MICROPHEN (1+1)
Replenishable ILFOTEC DD-X ID-11
Machine Processing
Dip and dunk ILFOTEC DD Best overall image quality (liquid) 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