Ah. Well, I've done this test since I DNG converted all my DS PEFs to DNGs. The difference, processing with Camera Raw, isn't really noticeable at all. Again, the bottleneck is how long it takes to OUTPUT the files rather than input them ... if I'm writing double-rez outputs, the time goes up almost by a factor of 30%.
Godfrey On Dec 17, 2006, at 3:32 AM, Tim Øsleby wrote: > No no G. What I had in mind was testing with files from my DS. > First with > PEF files. Then with my regular workflow using compressed DNG > files, all > files going thru same software. > > I believe this will tell me something about how my software/ > computer system > will perform with the larger files from the K10D. Not an accurate > test, but > it will provide me with some information I believe, since the size of > compressed DNG from K10D is almost the same as uncompressed PEF > from the DS. > Don't you think? > > I explained myself bad yesterday. Sorry about that. My system (read > brain) > was overheated, after a bad day at work. > > >> Only if you're processing them with the same software. The only three >> software packages that can process K10D PEF files are Pentax Photo >> Lab (slow as molasses no matter what you toss at it), Silkypix >> (reasonably speedy), and RAW Developer (Mac OS X only, pretty darn >> fast). PentaxLab converts PEF to DNG (glacially slowly, then at an >> inflated 21Mbytes apiece rather than *just* 16 or so), and then you >> can use Lightroom or Camera Raw, both of which outperform Pentax Lab >> by about two orders of magnitude on speed (on my computer, anyway). >> >> I did a test: had Camera Raw batch process 100 K10D DNG files to full >> resolution PSD files. Took just a little over 4 minutes. Same test >> with *ist DS PEF files (about 30% smaller) took 3.5 minutes. The real >> difference is in the output IO ... a 10Mpixel PSD file is about 40% >> larger file size than a 6Mpixel PSD file. >> >> >>> Since the size of an uncompressed PEF from my DS is pretty similar >>> to the >>> size of a compressed DNG from the K10D, I assume testing speed >>> with an >>> uncompressed PEF from my DS could give me a pretty good idea about >>> what to >>> expect. >>> >>> Does it make sense to you now? If it doesn't I guess it is >>> because I'm >>> tired. > -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
