Aside from Phantoms, RC aircraft, telescopes, guns, etc.., I also have a host of lightsabers. Lately I have been ordering the sabers with white LEDs, and then using filter sheets and a circular punch to make pretty much any shade saber one can imagine. As an inexpensive and extremely lightweight lens filter for the Vision+, you could use some of the filter sheeting like that below. To do this really nice, you would then order the appropriate sized circular punch, just slightly smaller than the lens barrel, and secure it in place with a touch of glue stick around the perimeter. By going slightly smaller than the barrel, the lens cap can still be utilized. All sorts of filter types are available from various sources.
Filter Sheeting: http://www.polarization.com/polarshop/
Circle Punch (come in various diameters): http://www.amazon.com/gp/product/B00161O9QI/ref=oh_details_o01_s00_i01?ie=UTF8&psc=1
Filter Sheeting: http://www.polarization.com/polarshop/
Circle Punch (come in various diameters): http://www.amazon.com/gp/product/B00161O9QI/ref=oh_details_o01_s00_i01?ie=UTF8&psc=1
