I was taking a sunset picture like i almost always do on my lanai in napili, maui when i saw a blurb in my picture review on my camera, i did not see anything thru my viewfinder as i was shooting. i looked up and saw nothing in the sky. we are currently in hurricane watch conditions from lane with winds at 20 - 25 mph at the time, so i don't think it was a drone or a weather balloon because how could it disappear so fast, maybe 5 to 10 seconds elapsed from shooting to looking up. in the picture the wind is blowing right to left. upon downloading my shots i noticed the blurb and assumed it was a large bird, some trash blowing (doubtful) or possibly something on my lens. no, no and no. i zoomed in and saw a round disc with a v shape cut from one side, greyish - green. the photo was taken at 1/1000 of a second, a setting i used in the high winds to 'freeze' the trees. i have the original raw file still. i then posted the pictures when i girl i know posted these in response, a photo from oahu that shows a very similar object. i'm truly bewildered by what i saw. the 1st shot is a cropped sunset shot showing the object in relation to the surrounding area. #2 is zoomed in from the original shot. #3 came from oahu and #4 is zoomed in on that shot.