Equilibrium   Ocean Pool @ Azenhas do Mar - Sintra - Portugal Nikon D800 + Nikkor AF-S 16-35mm f/4.0G ED VR @ 18 mm ISO 200 - f/8 - 62 sec | Filters Used: NISI F-Stopper PRO + Hitech GND 0.6 Reverse + Lee GND 0.6 SE