Hi Scott, it's a 45-85 3.5 Pentax 645 lens with adapter. I just bought a Nikon 60 macro G which is fabulous, but was too large for this set.
Bima is a south american store, similar to Ikea. I work with my assistance, visual and production comes from the store. We have an hour for each shot and most of the time works fantastic.
Of course not all set are as nice as this one.
So you're using the Zoerk adaptor? Too cool....