Archived posting to the Leica Users Group, 2010/06/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]There are truly lossless compression algorithms. And maybe compressed DNG uses one of them.... but then the amount of compression is never fixed... it varies by data. So compressed, lossless, fixed compression ratio, algorithms are not known to me... not that I know that much about the subject....... Maybe compressed DNG is lossless, maybe not.......after all, if you compress something, the deleted bits came from somewhere..... Why mess with it when memory cards are so small and so cheap? Frank Filippone red735i at earthlink.net Just received my M9 two days ago. Have been and intend to continue shooting DNG (raw) and doing all adjustments, even if it's only a preset, in Lightroom. Was surprised to see the option of DNG Compressed, a factor of two compression. In practice, does this cause significant deterioration, and under what circumstances? -- Herbert Kanner