exif: {"Image Make": "Canon", "Image Model": "Canon EOS 50D", "Image XResolution": "240", "Image YResolution": "240", "Image ResolutionUnit": "Pixels/Inch", "Image DateTime": "2011:05:01 14:45:17", "Image ExifOffset": "154", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "742", "Thumbnail JPEGInterchangeFormatLength": "11062", "EXIF ExposureTime": "1/250", "EXIF FNumber": "4", "EXIF ExposureProgram": "Aperture Priority", "EXIF ISOSpeedRatings": "200", "EXIF SensitivityType": "Unknown", "EXIF ExifVersion": "0221", "EXIF DateTimeOriginal": "2011:04:30 14:26:45", "EXIF DateTimeDigitized": "2011:04:30 14:26:45", "EXIF ShutterSpeedValue": "995723/125000", "EXIF ApertureValue": "4", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "3", "EXIF MeteringMode": "CenterWeightedAverage", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "50", "EXIF SubSecTimeOriginal": "07", "EXIF SubSecTimeDigitized": "07", "EXIF FocalPlaneXResolution": "792000/149", "EXIF FocalPlaneYResolution": "1056000/199", "EXIF FocalPlaneResolutionUnit": "2", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard", "EXIF BodySerialNumber": "1960703846", "EXIF LensSpecification": "[17, 50, 0/0, 0/0]", "EXIF LensModel": "17-50mm"}