blueSLR for Nikon Essential DSLR - fits Nikon D90, D3100, D5000, and D5100. works with: iPhone, iPod touch, and iPad. Map it: blueSLR shows you exactly where your photos were taken on a map. It encodes the location, time, speed, and direction right in the file. Share it: Share your photos on iPhoto: Places, Picasa or Flickr, and they'll be placed on a map. Show your friends where you've been. Map your adventures from the CN Tower to the Eiffel Tower. Sort it: Publish your photos on sites like iPhoto: Places, Picasa or Flickr and then sortthem based on where they were taken using blueSLR's sophisticated GPS geoencoding technology Love it: blueSLR is smaller, faster and more feature-rich than anything like it. No matter where you are or what the conditions are, you will love how easy it is tosetup and use. Plus, with Bluetooth technology, it fits in your pocket so you can take it wherever your blueSLR is a must for the serious geocacher in your life It lets you pinpoint the exact GPS coordinates of a geocache so you can find it first. Share your find online and beat other treasuer hunters at their own game.