I have a Beseler 23C III XL Dichroic enlarger for making color prints in my darkroom. I have been doing alot of research on the Internet regarding how adjusting Dichroic filters (CYM) impacts (or not) exposure time adjustments. I have seen all of the below:
- Dichroic enlarger heads do not require (or should not require)
exposure adjustments when changing filter settings.
- Changing the Yellow (Y) filter setting does not impact exposure
time settings but for each 1 unit adjustment of Magenta (M) or Cyan
(C) should require the exposure time to be changed by 1%. Of
course, I always set Cyan to 0.
- Others, broadly say that you should always adjust your exposure
time when you adjust your filter settings.
Kodak follows #1 except for CP and CC filters where they state exposure times should change when filter settings change.
Any guidance is well appreciated. Thanks.