> how can I setup a filter to the linked inventory list to show only selected items in our shotlist?
I'm not sure how your tables are set up, but assuming you're doing something like this:
Then using the following filter seems like it'd do what you'd like?
> Is it possible to link items to another? For example If i select a camera for the shooting, batteries should be automatically selected as well.
Well, sort of but not really. You could create another linked field in your "Items" table, where you link the "Camera" item to the "Batteries" item like you said, and so you'd end up with something like this:
Link to base