# EXIF Dictionary Keys Metadata keys for Exchangeable Image File Format (EXIF) data. ## Topics ### Dictionaries [`let kCGImagePropertyExifDictionary: CFString`](/documentation/ImageIO/kCGImagePropertyExifDictionary) A dictionary of key-value pairs for an image that uses Exchangeable Image File Format (EXIF). [`let kCGImagePropertyExifAuxDictionary: CFString`](/documentation/ImageIO/kCGImagePropertyExifAuxDictionary) An auxiliary dictionary of key-value pairs for an image that uses Exchangeable Image File Format (EXIF). ### Camera Settings [`let kCGImagePropertyExifDeviceSettingDescription: CFString`](/documentation/ImageIO/kCGImagePropertyExifDeviceSettingDescription) For a particular camera mode, indicates the conditions for taking the picture. [`let kCGImagePropertyExifFNumber: CFString`](/documentation/ImageIO/kCGImagePropertyExifFNumber) The F-number. [`let kCGImagePropertyExifShutterSpeedValue: CFString`](/documentation/ImageIO/kCGImagePropertyExifShutterSpeedValue) The shutter speed value. [`let kCGImagePropertyExifApertureValue: CFString`](/documentation/ImageIO/kCGImagePropertyExifApertureValue) The aperture value. [`let kCGImagePropertyExifMaxApertureValue: CFString`](/documentation/ImageIO/kCGImagePropertyExifMaxApertureValue) The maximum aperture value. [`let kCGImagePropertyExifFocalLength: CFString`](/documentation/ImageIO/kCGImagePropertyExifFocalLength) The focal length. [`let kCGImagePropertyExifSpectralSensitivity: CFString`](/documentation/ImageIO/kCGImagePropertyExifSpectralSensitivity) The spectral sensitivity of each channel. [`let kCGImagePropertyExifISOSpeedRatings: CFString`](/documentation/ImageIO/kCGImagePropertyExifISOSpeedRatings) The ISO speed ratings. [`let kCGImagePropertyExifSubjectDistance: CFString`](/documentation/ImageIO/kCGImagePropertyExifSubjectDistance) The distance to the subject, in meters. [`let kCGImagePropertyExifMeteringMode: CFString`](/documentation/ImageIO/kCGImagePropertyExifMeteringMode) The metering mode. [`let kCGImagePropertyExifSubjectArea: CFString`](/documentation/ImageIO/kCGImagePropertyExifSubjectArea) The subject area. [`let kCGImagePropertyExifSubjectLocation: CFString`](/documentation/ImageIO/kCGImagePropertyExifSubjectLocation) The location of the image’s primary subject. [`let kCGImagePropertyExifSensingMethod: CFString`](/documentation/ImageIO/kCGImagePropertyExifSensingMethod) The sensor type of the camera or input device. [`let kCGImagePropertyExifSceneType: CFString`](/documentation/ImageIO/kCGImagePropertyExifSceneType) The scene type. [`let kCGImagePropertyExifDigitalZoomRatio: CFString`](/documentation/ImageIO/kCGImagePropertyExifDigitalZoomRatio) The digital zoom ratio. [`let kCGImagePropertyExifFocalLenIn35mmFilm: CFString`](/documentation/ImageIO/kCGImagePropertyExifFocalLenIn35mmFilm) The equivalent focal length in 35 mm film. [`let kCGImagePropertyExifSceneCaptureType: CFString`](/documentation/ImageIO/kCGImagePropertyExifSceneCaptureType) The scene capture type; for example, standard, landscape, portrait, or night. [`let kCGImagePropertyExifSubjectDistRange: CFString`](/documentation/ImageIO/kCGImagePropertyExifSubjectDistRange) The distance to the subject. ### Exposure [`let kCGImagePropertyExifExposureTime: CFString`](/documentation/ImageIO/kCGImagePropertyExifExposureTime) The exposure time. [`let kCGImagePropertyExifExposureProgram: CFString`](/documentation/ImageIO/kCGImagePropertyExifExposureProgram) The exposure program. [`let kCGImagePropertyExifExposureIndex: CFString`](/documentation/ImageIO/kCGImagePropertyExifExposureIndex) The selected exposure index. [`let kCGImagePropertyExifExposureMode: CFString`](/documentation/ImageIO/kCGImagePropertyExifExposureMode) The exposure mode setting. [`let kCGImagePropertyExifISOSpeed: CFString`](/documentation/ImageIO/kCGImagePropertyExifISOSpeed) The ISO speed setting used to capture the image. [`let kCGImagePropertyExifISOSpeedLatitudeyyy: CFString`](/documentation/ImageIO/kCGImagePropertyExifISOSpeedLatitudeyyy) The ISO speed latitude yyy value. [`let kCGImagePropertyExifISOSpeedLatitudezzz: CFString`](/documentation/ImageIO/kCGImagePropertyExifISOSpeedLatitudezzz) The ISO speed latitude zzz value. [`let kCGImagePropertyExifRecommendedExposureIndex: CFString`](/documentation/ImageIO/kCGImagePropertyExifRecommendedExposureIndex) The recommended exposure index. [`let kCGImagePropertyExifExposureBiasValue: CFString`](/documentation/ImageIO/kCGImagePropertyExifExposureBiasValue) The exposure bias value. [`let kCGImagePropertyExifSensitivityType: CFString`](/documentation/ImageIO/kCGImagePropertyExifSensitivityType) The type of sensitivity data stored for the image. [`let kCGImagePropertyExifStandardOutputSensitivity: CFString`](/documentation/ImageIO/kCGImagePropertyExifStandardOutputSensitivity) The sensitivity data for the image. [`let kCGImagePropertyExifSourceExposureTimesOfCompositeImage: CFString`](/documentation/ImageIO/kCGImagePropertyExifSourceExposureTimesOfCompositeImage) The exposure times for composite images. ### Image Quality [`let kCGImagePropertyExifCFAPattern: CFString`](/documentation/ImageIO/kCGImagePropertyExifCFAPattern) The color filter array (CFA) pattern, which is the geometric pattern of the image sensor for a 1-chip color sensor area. [`let kCGImagePropertyExifBrightnessValue: CFString`](/documentation/ImageIO/kCGImagePropertyExifBrightnessValue) The brightness value. [`let kCGImagePropertyExifLightSource: CFString`](/documentation/ImageIO/kCGImagePropertyExifLightSource) The light source. [`let kCGImagePropertyExifFlash: CFString`](/documentation/ImageIO/kCGImagePropertyExifFlash) The flash status when the image was shot. [`let kCGImagePropertyExifSpatialFrequencyResponse: CFString`](/documentation/ImageIO/kCGImagePropertyExifSpatialFrequencyResponse) The spatial frequency table and spatial frequency response values in the width, height, and diagonal directions. [`let kCGImagePropertyExifContrast: CFString`](/documentation/ImageIO/kCGImagePropertyExifContrast) The contrast setting. [`let kCGImagePropertyExifSaturation: CFString`](/documentation/ImageIO/kCGImagePropertyExifSaturation) The saturation setting. [`let kCGImagePropertyExifSharpness: CFString`](/documentation/ImageIO/kCGImagePropertyExifSharpness) The sharpness setting. [`let kCGImagePropertyExifGamma: CFString`](/documentation/ImageIO/kCGImagePropertyExifGamma) The gamma setting. [`let kCGImagePropertyExifWhiteBalance: CFString`](/documentation/ImageIO/kCGImagePropertyExifWhiteBalance) The white balance mode. ### Image Settings [`let kCGImagePropertyExifGainControl: CFString`](/documentation/ImageIO/kCGImagePropertyExifGainControl) The gain adjustment setting. [`let kCGImagePropertyExifImageUniqueID: CFString`](/documentation/ImageIO/kCGImagePropertyExifImageUniqueID) The unique ID of the image. [`let kCGImagePropertyExifCompressedBitsPerPixel: CFString`](/documentation/ImageIO/kCGImagePropertyExifCompressedBitsPerPixel) The bits per pixel of the compression mode. [`let kCGImagePropertyExifColorSpace: CFString`](/documentation/ImageIO/kCGImagePropertyExifColorSpace) The color space. [`let kCGImagePropertyExifPixelXDimension: CFString`](/documentation/ImageIO/kCGImagePropertyExifPixelXDimension) The x dimension of a pixel. [`let kCGImagePropertyExifPixelYDimension: CFString`](/documentation/ImageIO/kCGImagePropertyExifPixelYDimension) The y dimension of a pixel. [`let kCGImagePropertyExifRelatedSoundFile: CFString`](/documentation/ImageIO/kCGImagePropertyExifRelatedSoundFile) A sound file related to the image. [`let kCGImagePropertyExifFocalPlaneXResolution: CFString`](/documentation/ImageIO/kCGImagePropertyExifFocalPlaneXResolution) The number of image-width pixels (x-axis) per focal plane resolution unit. [`let kCGImagePropertyExifFocalPlaneYResolution: CFString`](/documentation/ImageIO/kCGImagePropertyExifFocalPlaneYResolution) The number of image-height pixels (y-axis) per focal plane resolution unit. [`let kCGImagePropertyExifFocalPlaneResolutionUnit: CFString`](/documentation/ImageIO/kCGImagePropertyExifFocalPlaneResolutionUnit) The unit of measurement for the focal plane x and y resolutions. [`let kCGImagePropertyExifCustomRendered: CFString`](/documentation/ImageIO/kCGImagePropertyExifCustomRendered) Special rendering performed on the image data. [`let kCGImagePropertyExifCompositeImage: CFString`](/documentation/ImageIO/kCGImagePropertyExifCompositeImage) [`let kCGImagePropertyExifOECF: CFString`](/documentation/ImageIO/kCGImagePropertyExifOECF) The opto-electric conversion function (OECF) that defines the relationship between the optical input of the camera and the resulting image. [`let kCGImagePropertyExifComponentsConfiguration: CFString`](/documentation/ImageIO/kCGImagePropertyExifComponentsConfiguration) The components configuration for compressed data. [`let kCGImagePropertyExifSourceImageNumberOfCompositeImage: CFString`](/documentation/ImageIO/kCGImagePropertyExifSourceImageNumberOfCompositeImage) The number of images that make up a composite image. [`let kCGImagePropertyExifFileSource: CFString`](/documentation/ImageIO/kCGImagePropertyExifFileSource) The image source. ### Timestamp [`let kCGImagePropertyExifDateTimeOriginal: CFString`](/documentation/ImageIO/kCGImagePropertyExifDateTimeOriginal) The original date and time. [`let kCGImagePropertyExifDateTimeDigitized: CFString`](/documentation/ImageIO/kCGImagePropertyExifDateTimeDigitized) The digitized date and time. [`let kCGImagePropertyExifSubsecTime: CFString`](/documentation/ImageIO/kCGImagePropertyExifSubsecTime) The fraction of seconds for the date and time tag. [`let kCGImagePropertyExifSubsecTimeOrginal: CFString`](/documentation/ImageIO/kCGImagePropertyExifSubsecTimeOrginal) The fraction of seconds for the original date and time tag. [`let kCGImagePropertyExifSubsecTimeOriginal: CFString`](/documentation/ImageIO/kCGImagePropertyExifSubsecTimeOriginal) The fraction of seconds for the original date and time tag. [`let kCGImagePropertyExifSubsecTimeDigitized: CFString`](/documentation/ImageIO/kCGImagePropertyExifSubsecTimeDigitized) The fraction of seconds for the digitized date and time tag. [`let kCGImagePropertyExifOffsetTime: CFString`](/documentation/ImageIO/kCGImagePropertyExifOffsetTime) [`let kCGImagePropertyExifOffsetTimeOriginal: CFString`](/documentation/ImageIO/kCGImagePropertyExifOffsetTimeOriginal) [`let kCGImagePropertyExifOffsetTimeDigitized: CFString`](/documentation/ImageIO/kCGImagePropertyExifOffsetTimeDigitized) ### Lens Information [`let kCGImagePropertyExifLensSpecification: CFString`](/documentation/ImageIO/kCGImagePropertyExifLensSpecification) The specification information for the camera lens. [`let kCGImagePropertyExifLensMake: CFString`](/documentation/ImageIO/kCGImagePropertyExifLensMake) A string with the name of the lens manufacturer. [`let kCGImagePropertyExifLensModel: CFString`](/documentation/ImageIO/kCGImagePropertyExifLensModel) A string with the lens model information. [`let kCGImagePropertyExifLensSerialNumber: CFString`](/documentation/ImageIO/kCGImagePropertyExifLensSerialNumber) A string with the lens’s serial number. ### Camera Information [`let kCGImagePropertyExifMakerNote: CFString`](/documentation/ImageIO/kCGImagePropertyExifMakerNote) Information specified by the camera manufacturer. [`let kCGImagePropertyExifUserComment: CFString`](/documentation/ImageIO/kCGImagePropertyExifUserComment) A user comment. [`let kCGImagePropertyExifCameraOwnerName: CFString`](/documentation/ImageIO/kCGImagePropertyExifCameraOwnerName) A string with the name of the camera’s owner. [`let kCGImagePropertyExifBodySerialNumber: CFString`](/documentation/ImageIO/kCGImagePropertyExifBodySerialNumber) A string with the serial number of the camera. ### Flash Information [`let kCGImagePropertyExifFlashPixVersion: CFString`](/documentation/ImageIO/kCGImagePropertyExifFlashPixVersion) The FlashPix version supported by an FPXR file. [`let kCGImagePropertyExifFlashEnergy: CFString`](/documentation/ImageIO/kCGImagePropertyExifFlashEnergy) The strobe energy when the image was captured, in beam candle power seconds. ### Auxiliary Keys [`let kCGImagePropertyExifAuxLensInfo: CFString`](/documentation/ImageIO/kCGImagePropertyExifAuxLensInfo) Lens information. [`let kCGImagePropertyExifAuxLensModel: CFString`](/documentation/ImageIO/kCGImagePropertyExifAuxLensModel) The lens model. [`let kCGImagePropertyExifAuxSerialNumber: CFString`](/documentation/ImageIO/kCGImagePropertyExifAuxSerialNumber) The serial number. [`let kCGImagePropertyExifAuxLensID: CFString`](/documentation/ImageIO/kCGImagePropertyExifAuxLensID) The lens ID. [`let kCGImagePropertyExifAuxLensSerialNumber: CFString`](/documentation/ImageIO/kCGImagePropertyExifAuxLensSerialNumber) The lens serial number. [`let kCGImagePropertyExifAuxImageNumber: CFString`](/documentation/ImageIO/kCGImagePropertyExifAuxImageNumber) The image number. [`let kCGImagePropertyExifAuxFlashCompensation: CFString`](/documentation/ImageIO/kCGImagePropertyExifAuxFlashCompensation) Flash compensation. [`let kCGImagePropertyExifAuxOwnerName: CFString`](/documentation/ImageIO/kCGImagePropertyExifAuxOwnerName) The owner name. [`let kCGImagePropertyExifAuxFirmware: CFString`](/documentation/ImageIO/kCGImagePropertyExifAuxFirmware) Firmware information. ### EXIF Format [`let kCGImagePropertyExifVersion: CFString`](/documentation/ImageIO/kCGImagePropertyExifVersion) The EXIF version. --- Copyright © 2026 Apple Inc. 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