http://www.usa.canon.com/cusa/consumer/products/cameras/gps_receivers/gps_receiver_gp_e2?pageKeyCode=writeReviewPage
GPS Receiver GP-E2
24468

Features
To be able to endure a photographer's travels, Canon designed the GP-E2 to share the same rugged and durable exterior construction as the EOS 5D Mark III DSLR body while still remaining compact and lightweight. Able to withstand harsh weather conditions, the GPS Receiver GP-E2* is a great enhancement to the EOS 5D Mark III for those who wish to take their EOS system out into even the most remote environments.
*The GP-E2 offers the same level of dust- and weather- resistance as the EOS 5D Mark III when connected to the camera's hot shoe. Dust- and weather-resistance decreases when it is connected to the camera via the USB cable.
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
