Not quite pitch black at Soudan Underground Mine
{"Image ImageDescription": "c. www.Picklestravel.com", "Image Make": "SONY", "Image Model": "SLT-A99V", "Image Orientation": "Horizontal (normal)", "Image XResolution": "72", "Image YResolution": "72", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop Lightroom 6.0 (Macintosh)", "Image DateTime": "2016:10:26 14:50:25", "Image Artist": "Gretchen Alms", "Image Copyright": "Gretchen Alms | PicklesTravel Blog", "Image ExifOffset": "316", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "1008", "Thumbnail JPEGInterchangeFormatLength": "7964", "EXIF ExposureTime": "1/8", "EXIF FNumber": "9/2", "EXIF ExposureProgram": "Aperture Priority", "EXIF ISOSpeedRatings": "800", "EXIF SensitivityType": "Recommended Exposure Index", "EXIF RecommendedExposureIndex": "800", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2016:09:24 10:47:06", "EXIF DateTimeDigitized": "2016:09:24 10:47:06", "EXIF ShutterSpeedValue": "3", "EXIF ApertureValue": "86797/20000", "EXIF BrightnessValue": "-1227/320", "EXIF ExposureBiasValue": "-3/10", "EXIF MaxApertureValue": "31/32", "EXIF MeteringMode": "CenterWeightedAverage", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "35", "EXIF ColorSpace": "sRGB", "EXIF FocalPlaneXResolution": "429419/256", "EXIF FocalPlaneYResolution": "429419/256", "EXIF FocalPlaneResolutionUnit": "3", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "1", "EXIF FocalLengthIn35mmFilm": "35", "EXIF SceneCaptureType": "Standard", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF LensSpecification": "[35, 35, 7/5, 7/5]", "EXIF LensModel": "35mm F1.4 G"}