Technical Data Sheet

ManualsBrandsIlford Manuals35mm FilmDelta 400 Professional Black and White Negative Film

Page 2 of 7 No

2018

ELTA 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 1½ 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 Powde

Best overall image

quality

ILFOTEC DD-X ID-11 (stock)

Finest grain

Finest grain (EI 200/24)

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 qualit

and

long tank life.

Roller transport ILFOTEC RT RAPID Rapid processing