OK, the fact that photo stream still exist is confusing. It really needs to go away once iCloud Photo Library is out of beta.
So is there any reason NOT to choose optimized versions then?
Can I use iCloud photo library to get the photos into my main iPhoto library?
Not yet, no. You'll need to wait for the replacement for iPhoto and Aperture on the Mac - the new Photos app - to be available. It's due early next year. The only way you can see the photos using your Mac is by going to beta.icloud.com/#photos.
Imagine that out of this 3.5GB backup, 2GB is the Camera Roll backup. If I turn iCloud Photo Library on, will it need 3.5Gb + 2GB or the same old 3.5GB but now divided into 1.5GB backup and 2GB iCloud Photos?
Really? Unless you're being sarcastic, your questioning actually makes perfect sense.
All images in cloud, delete from ONE device = delete from ALL, since thats what "cloud" is, it's a server warehouse.. with different portals accessing it. One place for things with different doors.
I understand it breaks the mould we've all grown accustom to over the last 7 years, but it's what it should of been from the beginning (COUNTLESS times, I've had either may iPad/iPhone/Macbook try to share something, but it's only on my Macbook/iPad/iPhone)..
Yes it does. Click an image to make it full size, and there is a trash can in the upper right hand toolbar.
Incorrect on the photo stream. If you have it enabled, the photos are shared across all iDevices. If it is not, your photos are still stored in iCloud library, and accessible from the iCloud website, however you are only going to see that devices photos on each device.
problem is, they are SO LOW RES you can't see *****
except viewing the web version (beta.icloud.com) shows a lower resolution.
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Like everyone else I'm trying to sort out just what iCloud Photo Library is and isn't. When I take a picture on my phone, I want it to be on my photo roll on my camera. Then I can choose which photos to put into the iCloud Photo Library or in a shared photo library. In other words, the iCloud Photo Library needs to be a separate step from just taking a picture. Right now I think everything goes one place from the moment a picture or video is taken. But that's not ideal. I take many pictures and some become valuable enough for me to save in a formal cross-device sense (i.e., iCloud Photo Library), but I would also like to keep many to all of the pictures I take on my phone even if I don't want them in the iCloud Photo Library: Two different types of photo storage.
The other way of looking at this is from the delete perspective. When I delete a picture on my phone, I may not want to delete that picture from iCloud Photo Library. And conversely when I delete a picture from iCloud Photo library, I may not want to delete that picture from my phone. Again, two different types of photo storage.
What is the purpose of iCloud Photo Library if they delete from the cloud when you delete from your phone? Completely stupid.
No, with iCloud Photo Library enabled you see on all devices that have it enabled regardless of the Photo Stream setting.
I have done some experiments and figured it out...
The settings are independent of each other.
iCloud Photo Library (Beta) - it uploads ALL your photos to iCloud in original resolution. Option to Optimize iPhone/iPad Storage - this downloads all low-resolution (thumbnails) onto the IOS device. If you go and view a picture, then it will download the higher-res version - you can tell because the picture is fuzzy at first and takes a moment to download. Not sure how long IOS keeps the full resolution copy on the device after viewing. With Videos, it will only keep the thumbnail of the video until selected to play. Any device that has iCloud Photo Library enabled will see every picture or video from every other device. If you don't Optimize then the full pictures/videos are downloaded to each device. Photo Stream setting has no affect whatsoever on the functioning iCloud Photo Library as far as sharing between devices etc.
Photo Stream - this is the old photo stream pre-IOS 8. It is probably in there for people who do not wish to use the iCloud Photo Library (IPL), or wish to have compatibility with Photo Stream Apps (ie. Aperture, iPhoto). I am not 100% sure but I don't believe it uses the new iCloud storage and is "free" like before with the 1000 photo/monthly limit. If you enable it, all it does is uploads the pictures to the old legacy iCloud Photo Stream like it always has. With it you can view pictures etc. on OS X in Aperture or iPhoto. I imagine Photo Stream will be killed-off next year when we get a real OS X client for iCloud Photo Library.
You can enable Photo Stream in addition to iCloud Photo Library and have best of both worlds for now. I use Aperture to copy/backup pictures from my iPhone periodically and this is what I will do until a better solution comes along using iCloud Photo Library.
Maybe some others can experiment a bit to confirm or add to all of this since I may be missing something and do not guarantee 100% I am correct.
ALSO, just to add to the confusion, doesn't iCloud Photo Library work via wifi AND cellular? Because if you are connected to cellular surely your data is going to get hammered each time you take photos (which get uploaded to iCloud Photo Library) or view your optimised photos on your phone (at which point the phone downloads the higher res version as you are looking at it).
Again, no it doesn't, for me.
Think of the photos like you would contacts. If you delete a contact from your phone it deletes it from iCloud so your other iDevices don't have access to it.
Let's say you took a bunch of pics at a birthday party. All these pics get sent to the cloud. You then realize your finger covered to lens on 25% of those pics. When you delete them they get deleted across all your devices.
It's a different mind set than the way we've done photos in the past but to truly sync all your photos, this is have it works. Otherwise, iPL would simply be a photos folder.
Apple provides a solution in Settings > Photos to prevent all these photos from taking up space.