M7 Holder Featuring a new quick release design, the new Haida Filters M7 filter holder allows for fast filter installation and ease of operation. First install the adapter ring, then the holder, then it's just an easy "drop-in" process to inserting filters. The new design allows the round circular polarizer filter (Not Included) to be clipped into the holder, which does away with annoying screw in threads, allowing for quicker setup times. With less time spent on assembly you have more time to spend on the creative process.The M7 75mm filter holder is made from aviation grade aluminum and PC materials, resulting in a strong and durable filter holder that is also lightweight. Built to stand up to the rigors of outdoor landscape photography, the new Haida M7 filter holder is an absolute joy to use! Light Barrier Designed to prevent light leakage when using the holder without round filters. Adapter Ring M7 Exclusive, sizes available from 37mm to 67mm