Cokin does not make the best filters but they do have a very well designed filter system and a very large selection of filters. It is somewhat ironic that I cannot really find much useful information on their official site when it comes to learning more about the filters. The official site lists all the filters but few demonstration and comparisons between the filters. Welcome to Cafe Cokin, an unofficial Cokin filter system site. Start from the front page, or the Guide, or learn some tricks. If the site doesn’t answer your questions, you may want to join the discussion group.