On Jun 15, 2006, at 10:09 AM, Kenneth Waller wrote: >> No quality losses when saving the first JPEG after editing. > > I guess I knew that but haven't observed the difference. Has anybody?
I've tested TIFF output against JPEG highest-quality on four different cameras. There are differences, certainly, but insignificant to image quality. I see absolutely no point to saving TIFF files in-camera. They're huge, they are just 8bit RGB rendering (same as JPEG), they take forever to save, and they don't provide anything useful over JPEG highest-quality. When you open JPEG files for editing, immediately save them as .PSD or .TIF for editing purposes. Only resave to JPEG when you're done editing. You will not see any noticeable increase in noise or artifacts that way, even at maximum size prints. I worked with cameras that don't have RAW format capture options quite a bit (Sony F707/717, Panasonic FZ10). I made many thousands of excellent exposures with them and did a lot of editing with them too. The results are very good if you've got the JPEG parameters set up correctly. Making prints from them is not too big a deal, if the scene dynamics fit into the JPEG dynamic range. But it's a heck of a lot easier to work with tricky lighting situations using RAW format capture ... you have more dynamic range to work with and don't have to keep on top of white balance, contrast, saturation parameters to quite the same degree since these are all set in the RAW conversion phase of the workflow rather than in the camera. I don't find this additional step much of an issue, it's basically a matter of setting all the RAW parameters and then batch-converting the files to .PSD 16bit RGB or .JPG 8bit RGB depending upon what I need as output. 100-300 exposures usually takes about 10 minutes to get to that point. I'd rather have the ability to adjust things and the additional dynamic range than have to fiddle so much with the camera and bracket so much. Godfrey -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net
