Thanks Steve,
Interesting stuff that's for sure.
Each lens is specific to one narrow frequency of light and the losses are 20-40% ! Next year's version will be better no doubt
Just imagine a big 'filter' wheel on the front end of your empty focal tube - with an integrated narrow bandpass filter for each colour you want to image with !
I am not sure if they can make them to any large size yet, they mention being possible to get up to microscope objective so probably not in 2013
Paper here
http://arxiv.org/abs/1207.2194
Rally