From: utzoo!decvax!genradbo!linus!security!wdr
Newsgroups: net.rec.photo
Title: Free Filter Information
Article-I.D.: security.200
Posted: Wed Mar 23 12:30:49 1983
Received: Thu Mar 24 19:40:32 1983
References: hogpc.98


Both the COKIN book and a very nice one by HOYA are marked with a nominal
fee, but most dealers of these brands of filters will give you one if they
think you may buy filters from them. 

The HOYA book includes a nomography for lighting/filtration/film-sensitivty
to determine Color Compensation filtration when the light source 'color 
temperature' doesn't match the film's. Very useful.   

Producers of other lines of filters produce similar books.  UNDERGROUND CAMERA,
Foxboro, MA, mail-order and Boston area stores, imports the MARUMI slip-on,
twist off filters and a similar free booklet.