I experienced a rather odd bug that I'm not sure should go under Field Collections or Views.

I have a Field Collection for storing images, captions, credits, etc.
I did not have any image field by itself on any content type.
I attempted to create a view with the relationship of Field: Image (fid).
Not seeing it, I created a Field Collection relationship and the Image Field was still not available.
Once I added an arbitrary image field to a content type, the Field: Image (fid) became available - showing locations of node:contenttype and fieldcollection:fieldcollctionnname.

I'm unsure of why the field collection fields are not present in Views Relationships unless that same widget type is arbitrarily available directly within the content type.