http://www.usa.canon.com/cusa/support/consumer/eos_slr_camera_systems/gps_receivers/gps_receiver_gp_e2?pageKeyCode=writeReviewPage
GPS Receiver GP-E2
24468
Features
There's also a built-in electronic compass that can accurately detect the cardinal direction in which the photographer is facing - even if the EOS 5D Mark III and EOS-1D X are held vertically, the GP-E2 can still record the proper positioning from when it is in a normal position.
GPS Receiver GP-E2
5
5
2
2
Truly recommend it
The receiver looks like a small space starship once mounted on my Canon 5D Mark III. Works nicely and easily. Sometimes connecting to the GPS takes 2-3 minutes, but cannot indicate in which conditions it is much slower than the norm. Having pictures tagged with all coordinates is a very nice feature to have, primarily went in urban areas or in the wilderness. Actually, it is useful everywhere. Always travel with spare batteries just in case. Forgot to turn it off only the first time: lesson learnt.
May 18, 2013
Very accurate
Used in various places around the world. Match perfectly position as Google Earth, etc. As long in direct view of satellites extremely accurate. That.s not the case of cities where high buildings reduce the "access" to satellites signals resulting in some errors - applicable to any GPS receiver anyhow. Very satisfied about it!
October 9, 2012
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