measured drawing of the shutters
{"Image ImageWidth": "4928", "Image ImageLength": "3264", "Image BitsPerSample": "[8, 8, 8]", "Image PhotometricInterpretation": "2", "Image Make": "NIKON CORPORATION", "Image Model": "NIKON D7000", "Image Orientation": "Horizontal (normal)", "Image SamplesPerPixel": "3", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop Elements 11.0 Windows", "Image DateTime": "2013:05:03 19:50:52", "Image ExifOffset": "292", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "958", "Thumbnail JPEGInterchangeFormatLength": "6743", "EXIF ExposureTime": "1/100", "EXIF FNumber": "71/10", "EXIF ExposureProgram": "Manual", "EXIF ISOSpeedRatings": "400", "EXIF ExifVersion": "", "EXIF DateTimeOriginal": "2011:02:09 14:24:23", "EXIF DateTimeDigitized": "2011:02:09 14:24:23", "EXIF ShutterSpeedValue": "415241/62500", "EXIF ApertureValue": "2827819/500000", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "9/2", "EXIF SubjectDistance": "28/25", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "60", "EXIF SubSecTime": "80", "EXIF SubSecTimeOriginal": "80", "EXIF SubSecTimeDigitized": "80", "EXIF ColorSpace": "Uncalibrated", "EXIF ExifImageWidth": "648", "EXIF ExifImageLength": "455", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "0", "EXIF SceneType": "0", "EXIF CVAPattern": "[0, 0, 0, 0, 0, 0, 0, 0]", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Manual Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "1", "EXIF FocalLengthIn35mmFilm": "90", "EXIF SceneCaptureType": "Standard", "EXIF GainControl": "Low gain up", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF SubjectDistanceRange": "0"}