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NEF to JXL
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NEF stands for Nikon Electronic Format and is Nikon's proprietary raw image file format. It stores image data exactly as it was captured by the camera’s sensor, preserving the maximum amount of information and allowing for extensive post-processing flexibility in terms of exposure, color balance, and sharpness adjustments.

JXL stands for JPEG XL, a next-generation image coding standard developed by the Joint Photographic Experts Group (JPEG). JPEG XL is designed to provide efficient compression for both lossless and lossy image storage, offering high image quality at lower file sizes compared to previous standards. It supports a wide range of features including high dynamic range, wide color gamut, and progressive decoding, making it suitable for use in various applications from web graphics to professional photography. Despite its advantages, as a newer standard, JPEG XL may not yet have widespread support across all platforms and software.