Coupler height checks out
{"Image ImageWidth": "3008", "Image ImageLength": "2000", "Image BitsPerSample": "[8, 8, 8]", "Image PhotometricInterpretation": "2", "Image Make": "NIKON CORPORATION", "Image Model": "NIKON D40", "Image Orientation": "Horizontal (normal)", "Image SamplesPerPixel": "3", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop CS5.1 Macintosh", "Image DateTime": "2013:04:09 14:37:01", "Image HostComputer": "Mac OS X 10.6.8", "Image YCbCrPositioning": "Centered", "Image ExifOffset": "324", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "750", "Thumbnail JPEGInterchangeFormatLength": "10094", "EXIF ExposureTime": "9", "EXIF FNumber": "20", "EXIF ExposureProgram": "Aperture Priority", "EXIF ISOSpeedRatings": "200", "EXIF ExifVersion": "0220", "EXIF DateTimeOriginal": "2013:04:09 04:07:24", "EXIF DateTimeDigitized": "2013:04:09 04:07:06", "EXIF ShutterSpeedValue": "-126797/40000", "EXIF ApertureValue": "540241/62500", "EXIF ExposureBiasValue": "4/3", "EXIF MaxApertureValue": "5033165/1048576", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Cool white fluorescent (W 3900 - 4500K)", "EXIF Flash": "Flash did not fire", "EXIF FocalLength": "46", "EXIF ColorSpace": "Uncalibrated", "EXIF ExifImageWidth": "900", "EXIF ExifImageLength": "598", "EXIF SensingMethod": "One-chip color area"}