Hi all ... I have the colour head (quartz halogen lamp, diffuser) and have been using single colour (magenta) filtration. This method requires an exposure adjustment with every change in filtration which I find a bit frustrating. Will using dual colour filtration eliminate the need for exposure adjustments?
Ilford's documentation re. their multigrade papers states "Dual filtration values usually need longer exposure times than single filtration values, but need less adjustment to exposure times when changing contrast"
I don't see any advantage to dual filtration if there remains a need to adjust exposure even if that adjustment is "less".
Any thoughts, suggestions, experiences?