The instrument is described in the Apollo 16 Preliminary Science Report document as "the far UV camera / spectrograph".

The whole of Chapter 13 of this document is dedicated to a description of the instrument and its use during the mission.

I am having difficulty copying text out of the pdf, so here is the page with the description.

The device used film which was returned by the crew, so there were no observations done after they left.

Here is the page with the preliminary science results.

The instrument is described in the Apollo 16 Preliminary Science Report document as "the far UV camera / spectrograph".

The whole of Chapter 13 of this document is dedicated to a description of the instrument, its use during the mission, and preliminary results from it.

I am having difficulty copying text out of the pdf, so here is the page with the description.

The device used film which was returned by the crew, so there were no observations done after they left.

Here is the page with the preliminary science results.