Why is that the best way to sync the GPS and camera clocks?
Because it minimizes the possible error. A common belief is that the best way to sync the camera and GPS clock is to take a picture of the GPS unit when it’s showing the time and then to equate the displayed time back to the image’s time stamp. That belief is wrong. GPS units typically display the current time in 1 second increments, so using that method could result in an error up to 1 second. Unless you’re real uncoordinated, you can dramatically decrease the possible error by simply setting the camera’s clock when the GPS unit ticks to the camera’s current minute. Another reason why this is a better method is because it’s easier, not to mention that it’s quicker.
