I'm not quite sure about their exact optical setup, I know the Zyla's are used i...

I'm not quite sure about their exact optical setup, I know the Zyla's are used in the shark-vis instrument[0]. I would guess from their article that one Zyla is dedicated to adaptive optics and one for imaging.

[0] https://sites.google.com/inaf.it/shark-vis/instrument/detect...