We just got rather lucky, a friend was given free use of a 12 person house on Kuai for a week this fall. Have a D800 and 24-70 f/2.8 but with this once in a long-time opportunity I am looking for the best specialty lens. I'm considering which landscape lens to rent and am thinking the 24 f/1.4. Looking for the sharpest, best color reproduction lens that accepts filters. With all the water and sky I will want to use a polarizer or a NDF for waterfalls.