I used to have a table of comparison between smoking a joint with a filter,without a filter, hitting a bong, hitting a pipe and smoking a cigarette...hell if i can find it though..

Basically, with filtered joints a majority of the resin is caught in the filter, non filtered joints.. in the paper and on your lips. water pipe is obvious, the bowl takes most of the resin... unfiltered joints give you the most resin/tar filtered joints aren't as bad as the "filter" does catch most of it.. and water pipes make your smoke a lot less hazardous to your health .