tricks for measuring with a digital caliper
{"Image Artist": "bdring", "Image ExifOffset": "2130", "Image XPAuthor": "", "Image Padding": "[]", "EXIF DateTimeOriginal": "2010:11:10 12:54:21", "EXIF DateTimeDigitized": "2010:11:10 12:54:21", "EXIF SubSecTimeOriginal": "15", "EXIF SubSecTimeDigitized": "15", "EXIF Padding": "[]"}