Astrophotography aperture f/number noise comparison
{"Image Make": "SONY", "Image Model": "ILCE-7S", "Image Orientation": "Horizontal (normal)", "Image XResolution": "300", "Image YResolution": "300", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop CC 2017 (Macintosh)", "Image DateTime": "2017:03:16 21:46:44", "Image ExifOffset": "208", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "930", "Thumbnail JPEGInterchangeFormatLength": "3252", "EXIF ExposureTime": "8", "EXIF FNumber": "14/5", "EXIF ExposureProgram": "Manual", "EXIF ISOSpeedRatings": "12800", "EXIF SensitivityType": "Recommended Exposure Index", "EXIF RecommendedExposureIndex": "12800", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2017:03:16 20:32:05", "EXIF DateTimeDigitized": "2017:03:16 20:32:05", "EXIF ShutterSpeedValue": "-3", "EXIF ApertureValue": "1485427/500000", "EXIF BrightnessValue": "-3307/320", "EXIF ExposureBiasValue": "0", "EXIF MaxApertureValue": "217/128", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire, compulsory flash mode", "EXIF FocalLength": "55", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "2058", "EXIF ExifImageLength": "1026", "EXIF FocalPlaneXResolution": "38690215/32768", "EXIF FocalPlaneYResolution": "38690215/32768", "EXIF FocalPlaneResolutionUnit": "3", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Manual Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "1", "EXIF FocalLengthIn35mmFilm": "55", "EXIF SceneCaptureType": "Standard", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF LensSpecification": "[55, 55, 9/5, 9/5]", "EXIF LensModel": "FE 55mm F1.8 ZA"}