ircular Polariser and the big stopper in optically correct resin. Big Stopper is a glass of filter that reduces exposure by approximately 10 stop. Lee Filters seven 5 have created a balance to the exposure between sky and foreground. And also it eliminates distracting reflections from water. It made with high-quality optical glass0.6 Soft Grad and resin0.6 Hard Grad. It has 75 x 90mm (2.95 x 3.54″) 0.6 for soft gard. And 75 x 90mm (2.95 x 3.54″)0.9 for hard grad. The Seven5 Holder and rotated independently of any graduated filters also in use in front of the lens.