Hi Andrew, Single doublet as per LowSpec to start with but the holder can be a max of 40mm long so a pair is doable. I also have several mounted pairs that I need to try but that’s a bit down line.
The material is PETG (with carbon fibre for ‘production prints) which looks good in practice.
The FoV will be LowSpec range initially, so quite limited.
Rgds
T