Batyushka vs. Svyashchennik

[Daniel Michael Hendrick]

Hello Seelangers,

What is the real difference between a "svyashchennik" and a "batyushka"?
In my dictionary, they are "clergyman" and "father or priest"
respectively.  I am worried about the former, calling a svyashchennik a
"clergyman".  Can anyone explain how these terms differ, who is one or
the other, is one a formal and one an informal, form of address?

Thanks, Daniekl