A paired name calls for careful attention to the credits attached to each work. When exploring photography labelled Procter and Staas, look for statements that identify who made a particular image and how any collaboration is described. Do not assume that a shared heading means every photograph has two authors or that different contributor roles are interchangeable.
For comparison, keep an image's displayed title and credit together, then describe a visible feature such as its framing or use of light. If a project identifies separate roles, preserve those distinctions in your notes. Where no role information is supplied, use the paired label without expanding it into a claim about a company, partnership, location or service. Accurate naming gives visual discussion a sound starting point.