http://www.ebay.com/itm/ELEC-SHUTTER...80530014100%26

Does anyone know of plans to build a simple shutter box for lenses like this, to give adjustable speed? Or even use of a handheld device such as an ipod or iphone as a controller?

I imagine these could be pretty accurate, and really open up shuttered lens options for 8x10, or 4x5 non-speed graphics.