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PEF to JPE
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PEF stands for Pentax Electronic File, and it is a raw image file format used by Pentax digital cameras. This format stores unprocessed image data directly from the camera's sensor, allowing photographers to maintain a high level of control over image adjustments such as exposure, color balance, and sharpness during post-processing. PEF files provide the potential for higher image quality, as they preserve more information than standard compressed image formats.

The "JPE" file extension is a less common extension used for JPEG (Joint Photographic Experts Group) images. JPEG is a widely used image format known for its lossy compression, which significantly reduces file sizes while maintaining a high level of image quality, making it popular for photographs and web images. The "JPE" extension functions the same as the more common ".jpg" or ".jpeg" extensions, and it can be opened and edited with most image viewing and editing software. The reason for the different extensions simply comes down to historical variations and software preferences, and they all represent the same JPEG image format.