As to how this could be implemented in the UI:
Inkeeping with the current lens' drop-down UI, have the buttons instead be checkbox options, show a "done" button at the bottom when someone has made their selection.
This could however hurt the UX of quickly selecting a single lens, an alternative would be an additional option at the bottom of the drop-down for "multi-select lenses" or something along those lines.
I've not mocked anything up, just playing with the idea.