exif: {"Image Make": "Canon", "Image Model": "Canon EOS 40D", "Image XResolution": "240", "Image YResolution": "240", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop Lightroom 4.1 (Windows)", "Image DateTime": "2012:11:09 09:47:01", "Image Artist": "Jerry Luo", "Image ExifOffset": "228", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "856", "Thumbnail JPEGInterchangeFormatLength": "12265", "EXIF ExposureTime": "1/40", "EXIF FNumber": "11", "EXIF ExposureProgram": "Aperture Priority", "EXIF ISOSpeedRatings": "200", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2012:11:04 16:34:10", "EXIF DateTimeDigitized": "2012:11:04 16:34:10", "EXIF ShutterSpeedValue": "665241/125000", "EXIF ApertureValue": "6918863/1000000", "EXIF ExposureBiasValue": "-1/3", "EXIF MaxApertureValue": "4", "EXIF MeteringMode": "CenterWeightedAverage", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "18", "EXIF SubSecTimeOriginal": "00", "EXIF SubSecTimeDigitized": "00", "EXIF FocalPlaneXResolution": "324000/73", "EXIF FocalPlaneYResolution": "2592000/583", "EXIF FocalPlaneResolutionUnit": "2", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF SceneCaptureType": "Standard", "EXIF CameraOwnerName": "Jerry Luo", "EXIF BodySerialNumber": "1030507313", "EXIF LensSpecification": "[12, 24, 4, 4]", "EXIF LensModel": "Tokina AT-X 124 PRO DX 12-24mm F4(IF)"}