Use this recipe to save photos to Evernote. If someone shares a photo you want to keep, just reshare with hashtag #save. You can set visibility in FB to "Only Me" to limit spamming your followers.
If
New photo post by you with hashtag
This Trigger fires every time you post a new photo on Facebook with a specific hashtag.
Fewer details
Explore more great ways to automate Evernote and Facebook