no the values will not add up.

If you get 200 Magenta with your enlarger one filter is it , adding extra filter will not get you 400 magenta and extra contrast.
You will just increase your exposure time, and quite dramatically as every 30 filter increase in the Magenta will reguire you an extra stop of exposure on your print.
so I would not even consider this.

Bob

Quote Originally Posted by ragnar58 View Post
Hello to all,
Does anyone have comments or suggestions about adding an extra magenta dichronic filter to a Super Chromega housing?
I can't get really high contrast with the current magenta alone and would like to replace the cyan filter with a magenta filter. I'm assuming that the values will add when both filters are used. Using a dial is easier than inserting filters under the lens. I know that I'll lose some flexibility without the cyan but this seemed to be the best solution.
Thanks