dankapsner Posted January 29, 2007 Share Posted January 29, 2007 I was surprised to get 10.2 MB raw files from a 5 MP camera. Raw files from my 1D(4 MP) run under 4MB, from the 10D (6 MP) around 6 MP and often under, and from the 20D (8.2 MP) 8MB or less. Olympus says it doesn't compress raw files, yet on their website gives a 7.4 MB file size for raw. 10.2 MB simply isn't an efficient use of my card and hard drive space, and it eats up a ton of gold CDs to archive a shoot. My thought is to convert to DNG files--which I believe will be smaller--in Adobe Lightroom. Has anyone done this, and if so, how was the result?Thanks! Dan Kapsner Link to comment Share on other sites More sharing options...
rainer_t Posted January 29, 2007 Share Posted January 29, 2007 Dan, I don't know the E-1, so this is just a guess ... Is there an option to include a jpg-image of arbitrary (or fized) size/quality into the raw-file? That would explain the 2.5 MB difference easily. Rainer Link to comment Share on other sites More sharing options...
dankapsner Posted January 29, 2007 Author Share Posted January 29, 2007 Rainer, Thanks for the suggestion. That is possible, but my camera is set for raw only. I did check the manual, and it states the size for a raw file as 10.2 MB; I guess the other figure on the website was a mistake, or possibly I misread it. Still, the potential solution is to convert to DNG files, and I'd appreciate hearing from anyone with experience in this. Dan Link to comment Share on other sites More sharing options...
mark bucher Posted January 29, 2007 Share Posted January 29, 2007 I don't save the culls when shooting RAW, just the selects for printing and publication. I hear ya though on burning up the CD-Rs. Mark Link to comment Share on other sites More sharing options...
theokeijzers Posted January 29, 2007 Share Posted January 29, 2007 Keeping my eyes open here, because i would like to know if it's possible. I get 13.4 MB raw files from my E-500, and think that's pretty large. Link to comment Share on other sites More sharing options...
todd frederick Posted January 29, 2007 Share Posted January 29, 2007 I use an E-1 and an E-300 for weddings. With the E-1, my RAW file size is 10.17MB. After conversion to Jpeg with CS2, the file size is 14.1MB. I just checked this on the photo below from a Jan. 6, 2007 wedding I photographed in San Francisco, both on my RAW file and my Jpeg file of that wedding. My enlargements know no limits! I see no reason to use any other equipment. Link to comment Share on other sites More sharing options...
todd frederick Posted January 29, 2007 Share Posted January 29, 2007 Do I need a caption title?<div></div> Link to comment Share on other sites More sharing options...
dankapsner Posted January 30, 2007 Author Share Posted January 30, 2007 I tried an Adobe DNG converter tonight. ( I'd forgotten I'd downloaded before the end of the year.) It converted 16 ORF files quickly into DNG files that are half the size of the 10.2 MB originals. As I suspected, the files are considerably smaller, though the converted files varied in size and ranged from 5.7 MB to 4 MB. Most were in the range of 4.5 MB. While it's another step in the process, it does free up some hard drive space and cuts down on the humongous number of CDs required to archive RAW files with this camera. I suppose I'll have to test a bit with DNG and ORF files to make sure I'm happy with the converted results, but so far they look okay. The DNG converter is available free at www.adobe.com. Best regards, Dan Link to comment Share on other sites More sharing options...
dankapsner Posted January 30, 2007 Author Share Posted January 30, 2007 BTW, nice bride shot, Todd. Dan Link to comment Share on other sites More sharing options...
todd frederick Posted January 30, 2007 Share Posted January 30, 2007 Dan, Thank you. I've already filled one external hard drive and I'm now transferring photos to DVD's to free up space. I'll have to check into the DNG. Love the camera. Link to comment Share on other sites More sharing options...
paul_silk1 Posted February 1, 2007 Share Posted February 1, 2007 Hi Dan, I have been converting them to DNG for sometime now and have closely examined the same image from both file formats when converted and they are exactly the same when processed either in Adobe Photoshops CS2 raw developer or Silkypix Raw Developer(my Fav) so I would not worry. Another advantage to me of using DNG is that the Dam Program I use can write all the copyright/keyword/caption and other info into the Raw file so it stays with it and saves me having to do all over again when/if i convert it to another file format. Paul Link to comment Share on other sites More sharing options...
dankapsner Posted February 1, 2007 Author Share Posted February 1, 2007 Paul, Thanks for sharing your experience with DNG. Oddly, when I spoke with Olympus customer support about the size of the raw files they didn't mention the possibility of converting to DNG. Dan Link to comment Share on other sites More sharing options...
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