How to sync full-size photos from Aperture to iPad (3rd Generation)

Discussion in 'iPad Tips, Help and Troubleshooting' started by Cory Bauer, Mar 16, 2012.

  1. Cory Bauer macrumors 6502a

    Joined:
    Jun 26, 2003
    #1
    With the arrival of the iPad retina display and iPhoto for iOS, one of the first questions I wondered was if iTunes would sync higher-resolution versions of my photos than the relatively small versions it feeds my iPad 1st Generation. Well I'm happy to report that the answer is yes!

    While the iPad (1st Generation) is fed a scaled down version of your photos (1536 x 2312) by iTunes, the iPad (3rd Generation) can handle and will be fed much larger sizes. It appears that iPad (3rd generation) gets whatever the preview is that Aperture has generated based on the settings you've set in the "Previews" pane of the Aperture Application Preferences.

    When I had my Photo Preview set to "fit within 1920x1920", that's what the iPad (3rd Generation) ended up with. But when I set my Photo Preview to "don't limit", then iPad (3rd Generation) got the full resolution jpg preview. There's also a quality control slider here that determines the compression on a scale of 1 to 12.

    To test all of this, I deleted the iPod Photo Cache from the Aperture bundle, set my Photo Preview settings to "don't limit", and regenerated previews. I then synced the same two photos (one vertical and one horizontal) to each iPad, and from each iPad emailed the photos to my desktop Mac to check the sizes.

    iPad (1st Generation):
    Photo 01, 2312 x 1536, 1.1MB
    Photo 02, 1536 x 2312, 1.1MB

    iPad (3rd Generation):
    Photo 01, 4288 x 2848, 3.2MB
    Photo 02, 2776 x 4180, 2.8MB

    Now maybe this was already the case with the iPad 2, but since I do not own one I could not test it. But I hope this information is useful to someone else. For anyone that wants to really take advantage of that Retina Display or use iPhoto for iOS to it's fullest, you'd want the highest resolution possible.
     

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  2. Phil Lee macrumors 6502

    Joined:
    Mar 19, 2008
    Location:
    Manchester, UK
    #2
    I just did some testing myself on a photo that is 2736 x 3648 (10Mp) from a Canon S95. The master JPG is 2.1MB and was shot using auto settings. These are the size of the previews with the different compression settings shown:

    Don't Limit

    12: 6.2MB
    11: 2.5MB
    10: 2.2MB
    9: 1.9MB
    8: 1.7MB

    2560

    12: 4.1MB
    11: 1.4MB
    10: 1.2MB
    9: 961KB
    8: 784KB

    1920

    12: 2.3MB
    11: 711KB
    10: 612KB
    9: 501KB
    8: 411KB

    Half (1824)

    12: 2.2MB
    11: 768KB
    10: 650KB
    9: 520KB
    8: 419KB

    Since I use my iPad for photo viewing rather than editing I think I'm going to go with the 2560 image with a quality setting of 10. My Aperture library would become enormous if I set it to a much higher setting. With 18000+ photos in my library it would expand by 18GB for the previews with this setting.
     
  3. Cory Bauer, Mar 22, 2012
    Last edited: Mar 22, 2012

    Cory Bauer thread starter macrumors 6502a

    Joined:
    Jun 26, 2003
    #3
    Great follow-up, Phil! Thank you for crunching the numbers. I personally went with "don't limit" and a quality setting of 8 or 9, but I only generated new previews for my five-star photos and a few favorite albums. Before that, my previews had been set to 1920 and a quality of 8, so based on your numbers my previews would have roughly tripled in size.
     
  4. Phil Lee macrumors 6502

    Joined:
    Mar 19, 2008
    Location:
    Manchester, UK
    #4
    The reason I did some testing is I have a 240GB SSD in my MacBook Pro with 40GB set aside for Boot Camp. In an ideal world I would have gone for the no limit option with a compression of 9 but after my initial sync with my iPad using my old Aperture settings, my library had increased by about 40GB, leaving me with around 5GB of free space.

    I've had a real tidy up on my computer, moving almost all my masters and iTunes media to an external Firewire drive. I've also deleted all previews and thumbnails from Aperture and deleted the iPod Photo Cache. That brought the library size down to 2GB. The ~18500 thumbnails regenerated automatically, adding 12GB to the library. I now have about 130GB of free space for Aperture to breath.
     
  5. Avicdar macrumors regular

    Joined:
    Oct 11, 2004
    Location:
    Toronto
    #5
    I'm a little confused on this. How can you start with a JPG file that is 2.1MB (original) and get previews that are larger?

    The highest quality file should be the original that you feed it. Why the extra large files?
     

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