Archived posting to the Leica Users Group, 2007/04/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]While packing to go away, I broke my usual procedure and connected the M8 directly into the USB port rather than taking the card out and using card reader as I usually do. I thought it would save me a little time. Odd behavior #1: I was shooting DNG - the images arrived in Lightroom as TIF files, apparently good in all other respects. Odd behavior #2: On a whim I did the Lightroom "Convert to DNG" thing. With my Nikon files doing this usually resulted in a large increase in the file size. With the M8 originated tif, the file sizes halved, from a constant 10,335 KB to a variable 5,800 to 6,000 KB. Looks like the tif is compressed, whereas the dng is uncompressed. Odd behavior #3: I opened the DNG in Photoshop CS3 to see if it was a good file - it was. saved is a a 16 bit tif with zip compression. 58,217 KB. Saved as 16 bit tif with LZW compression - 76,840 KB. Not so odd behavior: For my last trick, I renamed a regular dng file as TIF and opened it in CS3. Worked perfectly. Not surprising - dng is just a special tif. I will not be able to work on this (or take it to the Adobe forum where it belongs) while I am away - but I find it very interesting. May be able to halve my disk usage with DNG? Bye for three weeks. I leave tomorrow. -- Clive http://www.clive.moss.net/blog/