I thought that I would save my pictures in the original jpeg and then work on copies if I wanted to adjust levels, etc., but a friend said to download the jpegs and convert to tif and then save and work with tif files. I don't know the best way to save and archive. So far I have saved the original jpegs and then burned them to cd. When I want to work with the picture I then get it off the cd. I have some pictures that I want to rotate and some that I want to adjust levels in Elements2 and then burn them to a cd to send to a friend. Should I convert to tif before adjusting and then save as jpeg or just open them, adjust and not worry about losing resolution when I resave? I have an S30 and S820 and like both very much. Thanks.
If your original images are shot in JPG, I'm not sure what converting to TIFF is going to do for you since you've already lost image data in your "original". Converting JPG to TIFF just so you can edit the image and then save the final image as a JPG file just adds a useless step to the overall process. All you really need to do is load the JPG file, edit it to your heart's content and then save the final image as a JPG file. This, of course, is assuming that the editing will be done in one session without any intervening saving and reloading of the file.
(When you say you convert from JPG to TIFF, do you mean that you load the JPG file, then "Save As" a TIFF file and then load the TIFF file into your editor for editing? Can't think of any reason why you would "convert" a file like that!)
Now, if you want to partially edit the JPG file and then save it for more editing at a later time, then, by all means save it as a TIFF file or better yet, as a PSD file, especially if you have multiple layers. You can then go back to editing this file again and when you're all done, you can save the final image as a JPG file to email to friends. NOTE, however, that there are no extra steps taken to convert the JPG file to TIFF or PSD before the image is edited. The JPG file is edited as a JPG file and it automatically gets converted to a TIFF or PSD file when it is saved as a TIFF or PSD file for later editing.