Some photographers prefer diluting developers for high contrast scenes' control, adding reduced agitation... That makes a developer, a more compensating one... Good sometimes, but sometimes bad, depending on the scene, if midtones get too compressed...
For soft light, stronger dilutions are said to be a better option... I used to develop with rodinal 1:50 for overcast, and I liked the images, but I tried 1:25 for the same soft light years ago, and tones looked better, with more separation...
What have you found with FX-39?
With this developer there's a lot of contradictory information around... Dilutions from 1+9 to 1+19 are recommended... From 1+14 on, it's considered by some photographers, a compensating developer...
As Paterson original published times were found too long by many, including diffuser enlargers users, it's been often said since, use, instead of the original 1+9 recommendation, similar times but with the compensating 1+14, 1+17 and 1+19 dilutions... Economy points there too, so perhaps some people have been doing soft light with a system that's not the best for mild expansion, but only for economy, unnecessary compensation, and worse, inappropriate compression...
Is someone using 1+9 for soft light?
I have found nothing on the subject, not even if Crawley himself offered both dilution levels with scene contrast in mind...
Thanks everyone.