If you are using AI/AIS Nikkor lenses then a 52mm filter thread is quite common. I use a Nikon Yellow Y48, a Hoya orange filter (can't remember the grade), a red Nikon R60 & a circular polariser.This Ken Rockwell page gives info on filter effect for B&W film. http://www.kenrockwell.com/tech/filters.htm

When buying filters look for ones that are multicoated if you can. Also avoid cheap no brand ones.