Marillyn, I noticed you shoot at very high iso's sometimes. I'm assuming you want to maintain your very high shutter speeds. Your photos are always very clear and defined. I can't seem to get my photos that nice when I shoot 200mm or more. How in the heck do you do it? Do the high isos become a problem when you want to enlarge the photos? You are one of the greats on this forum and you always present very beautiful photos. Paul