Originally Posted by
Fitter2
With a sheet of photochromatic material of the right characteristic, it would self adjust to any lighting condition; unfortunately I don't have the time to do the experiments.
Before someone patents the idea, I published it here first.....
If photochromatic glasses are anything to go by, plexiglass absort UV rays and so they don't change properly when in the cockpit, so probably not an option.
And no - the cases changed between hero 2 and hero 3 so you need to get gear that is specific to your model.