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Speedlites, Printers, Accessories / GP-E1 Time Accuracy
« on: September 26, 2012, 05:21:44 AM »
I just measured the time accuracy of my newly purchased GP-E1. The advertised accuracy as shown on the Canon USA website is +/- .01 sec. I installed an NTP time app on my iPhone (Emerald Time), which claims a corrected time to the nearest tenth of a second. (I verified Emerald Time's accuracy by calling the NIST time recording at 303-499-7111.) Below is a photo of Emerald Time and the associated exif time data. The GP-E1 was more than a second off. I force-updated the camera's clock off the GPS multiple times and the results were consistent and repeatable.

