What Filters to use on what target?

[Lex]

Hy guys,

I am wondering if it is still a question of experimentation or if there is some kind of rule/schedule saying what kind of filters should be used in combination with the target wanted to be imaged?

Is there a big difference between narrow and large-band kind of filters?
I own a set of large band ones and I really do not obtain promising images; am I doing something wrong?
I wanted to create some mapped-color images without success; are there some secrets?

While swapping Filters....

Thanks for Answers 

Thanks

Lex