G.L.I.M.P.S.E.

Great
Location
Intervening
Materials
Prevent
Seeing
Everything.

As in: Hmmm, this looks like a Great Location to photograph a Glimpse. The Intervening Materials (the frame) Prevent me from Seeing Everything.

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This was surprisingly hard to come up with. I think the acronym can help people remember the group's objectives and limitations.