Photography is about controlling light. For any amateur and professional photographer, filters are a necessity so that they won't have too much light on their sensors (component that is inside a camera) because that will ruin any shot.
For the past few months, I have been slowly gathering the Cokin P filter system from ebay. It is a cheap filter system that enables me to have the same filter for both of my lenses. I just have to screw an adapter on my lens, snap on the holder and just slide a filter or filters in. Voila!
From the left, I have the ND8 graduated filter (P121F) that allows me to capture clouds while taking landscape shots, the CPL filter (third party type as the original one is almost 80 AUD) for taking photos during the daytime without the glare, the filter holder, the ND8 solid filter (P154) for taking wispy shots of clouds and water and the adapter rings (52mm and 58mm).
Some of the landscape photos in the past few previous posts were shot using the P121F. I can't wait to use the P154 and the CPL in Semaphore Beach, which is only a few minutes from our place.