Experimented with infrared photography today. Read online where the Nikon D800 was not usable for same, but then Roy Inman found an article online that said otherwise. Otherwise is correct. My IR filter is 67mm and I currently have no lenses of that diameter... so, had to hold the filter in front of my 50mm lens. Works but not optimal. I had forgotten how difficult IR can be. Above, Indian Mound, below, the KC skyline from Kessler Park.