Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your PEF images to TIFF64 format. This tool works for both professionals and casual users. Convert your images to TIFF64 in seconds.
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Pentax Electronic File
Pentax's native raw format, offering a choice against DNG.
PEF is the proprietary raw image format used by Pentax (Ricoh) cameras. Uniquely, Pentax DSLRs (like the K-1 and K-3) allow users to choose between saving files as PEF or Adobe DNG in-camera. PEF files contain the raw sensor data and proprietary metadata that is optimized for Pentax's own software.
PEF is a TIFF-based format using lossless compression. It is functionally very similar to DNG, but because it is proprietary, it may contain specific 'MakerNotes' that third-party software might not fully decode (though this is rare nowadays).
Pentax has used PEF since their first digital SLRs. Despite adopting DNG as an in-camera option, they have kept PEF as the default native format.
BigTIFF
TIFF for files larger than 4GB.
BigTIFF (often referred to as TIFF64) is an extension of the classic TIFF format designed to break the 4GB file size barrier. It uses 64-bit offsets instead of 32-bit, allowing for files up to 18,000 petabytes.
Standard TIFF uses 32-bit integers for file offsets, limiting the file size to 2^32 bytes (4GB). BigTIFF changes the internal structure to use 64-bit integers. It is not backward compatible with older TIFF readers that only understand 32-bit offsets.
Developed to address the needs of geospatial and medical imaging, where single images often exceed 4GB. It is supported by LibTIFF starting from version 4.0.
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