5 Replies Latest reply: Jul 18, 2013 6:30 PM by Old Toad
Phil McFarlane Level 2 Level 2 (440 points)

Hi gang,


When I share photos using Photostream, the shared photos that the invited guests see are much smaller than the original. For example, a 7 MB pic becomes less than 1 MB.  Is there something I am doing wrong?  How do I share the photos using Photostream so that other people can download the original file?


  • LarryHN Level 9 Level 9 (73,065 points)

    see this article for info on Photostream

    an excerpt form it

    What resolution are My Photo Stream photos?

    On your Mac or PC, your photos are downloaded and stored in full resolution. On your iPhone, iPad, iPod touch, and Apple TV, your Photo Stream photos are delivered in a device-optimized resolution that speeds downloads and saves storage space. While actual dimensions will vary, an optimized version of a photo taken by a standard point-and-shoot camera will have a 2048 x 1536 pixel resolution when pushed to your devices. Panoramic photos can be up to 50 pixels wide.


  • bobgeo Level 1 Level 1 (25 points)

    I uploaded photos to Photostream using iPhoto on my Mac and then went to the public photostream link to download them on the same computer. The downloaded photos onto the computer are under 1 MB; not the 8 MB the originals are in.


    I read that same thing at Apple, but now I am thinking that if you publish the photos using Photostream and also choose the "public" option; then folks who click on the public link and then download the pictures onto their PC, that it actually downloads at some type of lower resolution.


    I get that this happens with portable devices or Apple TV, but it appears to be happening also with downloading to a PC or Mac.

  • Old Toad Level 10 Level 10 (131,485 points)

    The photos will have pixel dimensions up to 2048 x 1536 pixels max.  What will be different will be the jpeg compression that is applied to the file to make it smaller for up- and down-loading. The resolution will be the same, but not the compression. 



  • bobgeo Level 1 Level 1 (25 points)

    Yes, I took another look and you are correct on the pixel dimensions. I download the photo from Flickr at original size and it was 4,000 x 6,000 at a 300 DPI. The same image downloaded through iCloud Photostream was 2,304 x 1,536 at a 72 DPI. I used Preview inspector to get those stats. Note that with Flickr the file size was around 5.1 MB (originally, it was around 8 MB, it is a 24 megapixel DSLR Nikon Camera). With iCloud Photostream, the photo size downloaded to my Mac was about 800 KB.


    It would be nice if there was an option in iCloud Photostream to download the original file size. Many to most times you are sharing and folks would like a high-quality original for whatever reason of one particular photo from the set.


    Similar to how iPhoto keeps an original size around, it would be nice to have that option with iCloud Photostream.

  • Old Toad Level 10 Level 10 (131,485 points)

    Remember that DPI is meaningless until you pick a print size. See The Myth of DPI