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Message: <blockquote data-quote="pforsell" data-source="post: 704309" data-attributes="member: 7240">Yes. The buffer is the working memory. Most cameras capture the full raw data first into buffer, 12 or 14 bit. After that the processor makes a JPEG preview of the raw data into the buffer, and also the additional JPEG file. Then the raw data + the JPEG preview are written into a raw file onto the card as well as the JPEG file (if any).Some operations require that two copies of the same raw data is temporarily held in the buffer, before the raw file is written to the card and the buffer space can be cleared. This is the reason why noise reduction, lens corrections, vignette corrections and some other operations reduce buffer space.</blockquote>