In this sense, are the actresses the ones who are at home, or is it the one taking the pictures?
It's the home of the speaker. Itthon/otthon refers to your own home.
Isn't "taking photos" also correct?
It is, but apparently that translation is not in the database yet. Use the report button to report such cases.
It is still not in the database.
I am taking photos of actresses at home. - accepted