I love my Nikkor 70-200 f./2.8 VR2 but let’s face it, the lens takes up a lot of weight and space in the carry-on luggage when you are traveling.  On trips when photography is not the main objective or when traveling with a carry-on only, there is room for the camera with one lens attached and maybe a flash.  In those situations, the Nikkor 18-300 f./3.5-5.6 VR2 is the lens. I tested this lens under extreme conditions on a sailboat.  I could only take one lens because of packing considerations and because changing lenses at sea always involves risk to…