according to the write up, gives up to 3 stop advantage. up to 2 stop when shooting with 300mm lens.
http://www.xs4all.nl/~wiskerke/artikelen/string.html
http://www.xs4all.nl/~wiskerke/artikelen/string.html
Quite an interesting idea... just need to figure out how to use that.
after securing the system all u need to do is step on the rope to create enuff pulling tension.
by the way, what is the thread size of the tripod socket holes? any standard? can i find any screw that match?