Geotagging my photos is an old wish of mine but until now I have not found a convincing solution for Canon/Mac users.
From Canon's press release regarding the new accessories: «Compatible with the EOS-1D X, EOS 7D and new EOS 5D Mark III, the GP-E2 tags photos with longitude, latitude and altitude data as well as the direction in which the shot was taken, adding information to the EXIF file of the image.»
They state that the GP-E2 will be compatible with the 7D but on http://www.usa.canon.com/cusa/consumer/products/cameras/gps_receivers/gps_receiver_gp_e2
they also say that half of its functions will NOT be available to 7d users: «†When the EOS 7D is used with the GP-E2 the following restrictions will apply: a) geotagging function will not work for movies while recording; b) geotagging features will not work for movies when using the Map Utility; c) electronic compass information and automatic time setting is not available; d) transmission via the hot shoe is not possible.» I'm not too bothered about the movie functions but the lack of compass information is rather disappointing – especially for a device with such a price tag (US: $390 / EUR: €279 / UK: £299.99 according to http://dancarrphotography.com/blog/
Are there any well functioning alternatives to the GP-E2 you guys know of? And perhaps a little less expensive than Canons' ?