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
Accurately adjusting the cameras internal clock with the GPS Receiver GP-E2 is easy because it can use the UTC (Universal Coordinated Time) with a margin of error of about ±0.01 second on the EOS 5D Mark III. The margin of error when used with the EOS-1D X is ±0.02 second. Event photographers will find the transmitter's GPS Time Sync Function quite helpful because it can set and synchronize the internal clocks in multiple cameras. This function is not available when using the GP-E2 with the EOS 7D.
GPS Receiver GP-E2
5
5
1
1
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
