10 Replies Latest reply: Sep 25, 2008 11:26 AM by Terence Devlin
oraziosimone Level 1 Level 1 (0 points)
Which is the advantage in selecting "save edits as 16-bit TIFF files" in the "advanced"
preferences pane ?
If I understand correctly the behavior of iPhoto, each time a raw file is edited the application
adds editing instructions to some sort of internal database and applies them (starting from
the raw file) to produce a new rendering of the image, saving it in a preview file (Jpeg or TIFF, according to the selected option). Whenever I decide I have the final edit of the image I can
export it to the format I desire (TIFF or JPEG or whatever) independently from this option,
straight from the raw file. So in no case I will have multiple edits of a jpeg file and the final
image will always be an export from the raw file (not from a jpeg or TIFF file). So, which is the
advantage in asking to have the (intermediate) preview files in TIFF format ?

Thanks,
Simone

iMac, MacBoook, Mac OS X (10.5.1)
  • 1. Re: RAW files
    Old Toad Level 10 Level 10 (115,715 points)
    Simone:

    If you select just the save as tiff checkbox then any edit you make in iPhoto whether it be a jpg or a raw file will have the modified file saved as a tiff file. The tiff file will be approximately 20 times the size of the jpg file.

    If you're editing a jpg file to start with then there's no advantage to saving the modified file as a tiff file as the jpg compression has already been done of the file.

    If you've checked the Use RAW when editing in an external editor you will have the option to select one of four formats: dng, tiff, jpg, psd. The edit has to be saved to a new file since the RAW file is never physically modified. If you're using PS or a 3rd party editor with iPhoto these tips might be of some help:

    Using Photoshop (or Photoshop Elements) as Your Editor of Choice in iPhoto.


    1 - select Photoshop as your editor of choice in iPhoto's General Preference Section's under the "Edit photo:" menu.

    2 - double click on the thumbnail in iPhoto to open it in Photoshop. When you're finished editing click on the Save button. If you immediately get the JPEG Options window make your selection (Baseline standard seems to be the most compatible jpeg format) and click on the OK button. Your done.

    3 - however, if you get the navigation window that indicates that PS wants to save it as a PS formatted file. You'll need to either select JPEG from the menu and save (top image) or click on the desktop in the Navigation window (bottom image) and save it to the desktop for importing as a new photo.


    This method will let iPhoto know that the photo has been editied and will update the thumbnail file to reflect the edit..


    NOTE: With Photoshop Elements 6 the Saving File preferences should be configured: "On First Save: Save Over Current File". Also I suggest the Maximize PSD File Compatabilty be set to Always.

    If you want to use both iPhoto's editing mode and PS without having to go back and forth to the Preference pane, once you've selected PS as your editor of choice, reset the Preferences back to "Open in main window". That will let you either edit in iPhoto (double click on the thumbnail) or in PS (Control-click on the thumbnail and seledt "Edit in external editor" in the Contextual menu). This way you get the best of both worlds

    2 - double click on the thumbnail in iPhoto to open it in Photoshop. When you're finished editing click on the Save button. If you immediately get the JPEG Options window make your selection (Baseline standard seems to be the most compatible jpeg format) and click on the OK button. Your done.

    3 - however, if you get the navigation window that indicates that PS wants to save it as a PS formatted file. You'll need to either select JPEG from the menu and save (top image) or click on the desktop in the Navigation window (bottom image) and save it to the desktop for importing as a new photo.

    This method will let iPhoto know that the photo has been editied and will update the thumbnail file to reflect the edit..





    TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto (iPhoto.Library for iPhoto 5 and earlier) database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.

    I've created an Automator workflow application (requires Tiger or later), iPhoto dB File Backup, that will copy the selected Library6.iPhoto file from your iPhoto Library folder to the Pictures folder, replacing any previous version of it. It's compatible with iPhoto 6 and 7 libraries and Tiger and Leopard. Just put the application in the Dock and click on it whenever you want to backup the dB file. iPhoto does not have to be closed to run the application, just idle. You can download it at Toad's Cellar. Be sure to read the Read Me pdf file.


    Note: There's now an Automator backup application for iPhoto 5 that will work with Tiger or Leopard.
  • 2. Re: RAW files
    oraziosimone Level 1 Level 1 (0 points)
    Dear Old Toad,

    what I'm trying to understand is what happens if I edit a RAW file using iPhoto (no Photoshop or any other external program) leaving the "save as TIFF" unchecked.
    I understand that at the end of each editing session iPhoto will produce a jpg file. But at any moment I may decide to export the RAW file to TIFF (using the File --> Export menu).
    I'm assuming that, even leaving unchecked the "save as TIFF" box, the export operation is performed starting from the RAW file (with all editing instructions applied), not from the jpeg file. Am I right ? If this is the case, I don't get the advantage of selecting "save as TIFF".

    Thanks, regards
    Simone
  • 3. Re: RAW files
    Terence Devlin Level 10 Level 10 (123,855 points)
    oraziosimone

    I'm assuming that, even leaving unchecked the "save as TIFF" box, the export operation is performed starting from the RAW file (with all editing instructions applied), not from the jpeg file. Am I right ?


    No that's not right. It will simply export the jpeg. If you save as tiff it will export the tiff. The reversion to the Original file only takes place if you re-edit.

    What you describe is possible with Aperture.

    Regards

    TD
  • 4. Re: RAW files
    oraziosimone Level 1 Level 1 (0 points)
    Thanks a lot, that now makes it clear.
    To me was not so straightforward to understand that:
    - editing will reload the raw file with all edits (not just the
    saved jpeg)
    - exporting will just use the saved file (either jpeg or tiff)
    even when I ask a different delivery format.
    Sounds like a weird iPhoto limitation.
    Anyway (since I cannot afford enough disk space to save all as
    TIFF, while I do like to have a TIFF export for the final, delivery,
    version of the photo) I could use the following workflow:
    1) import all RAW files leaving "Save as TIFF" unchecked
    2) perform all edits I need (even in different stages)
    3) when I'm ready to export the final version, I just check the
    "save as TIFF" box, and make a very small edit (like changing
    very slightly the luminosity of the photo) just to force iPhoto
    produce the TIFF version from a RAW edit. Then I can export
    the photo to TIFF and switch back to "save as TIFF" unchecked.

    Would it work or will I loose anyway some information in the final
    delivery photo, respect to leaving "save as TIFF" always checked ?

    Thanks a lot, regards
    Simone
  • 5. Re: RAW files
    Terence Devlin Level 10 Level 10 (123,855 points)
    That should work. But it does seem like a lot of trouble.

    If you're shooting RAW then have a look at Aperture. You can download a trial and explore. When you make an edit in Aperture that is saved to the database and +applied live+ when you view the image. It has many export presents and you can create your own, and these exports are produced directly from the Original.

    Regards

    TD
  • 6. Re: RAW files
    hammersb Level 1 Level 1 (15 points)
    I am considering buying a RAW camera and am exploring the implications of this. I have auditioned Aperture at the Apple Store and like it very much. One consideration, I have a iMac G5 1.9GHz and although it passed the Aperture compatibility test OK I wonder how slow it will run on my 2.5 year old non intel iMac?

    Anyone have any experience or insight?
  • 7. Re: RAW files
    Terence Devlin Level 10 Level 10 (123,855 points)
    hammersb

    I use Aperture on my Intel Macs and my experience is very positive. I have no speed issues. Some things that will help in any case:

    When you import pics Aperture will set off making the Previews. Let it if you can and come back to work after that's done. It will make a difference if you're actually editing - not a problem for viewing. But best of all, why not download the free trial and experiment with it. It does work with jpegs too - just the range of tweaking is less on the compressed format - you can download it here:

    http://www.apple.com/aperture/trial/

    Regards

    TD
  • 8. Re: RAW files
    hammersb Level 1 Level 1 (15 points)
    Terrence

    Thanks for the info. My iMac is a non-intel PowerPC G5 so I was wondering if you felt that may pose a problem running aperture?

    Bruce
  • 9. Re: RAW files
    Terence Devlin Level 10 Level 10 (123,855 points)
    Problems? None. Depending on things like how much RAM you have it may be slow, may not. But like I say, take the guess work out of it and download the trial.

    And, of course, check out the Aperture Fourm:

    http://discussions.apple.com/category.jspa?categoryID=184

    Regards

    TD

    Message was edited by: Terence Devlin
  • 10. Re: RAW files
    hammersb Level 1 Level 1 (15 points)
    Thanks. I'm downloading it now!