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