Question on leica filter.
I bought myself a Nr. 1 yellow filter for my summitar.
My first question is how many stops do I have to open up, one or two?
It has some cleaning marks, not to many though. Do you think that will influence the performance of the lens badly? Is there maybe a way to change the glass with a different filter.
Sooner or later I will get a "snooh" anyway, but that could take a while.
Thanks for your help in advance