had a play around with a prism this week , as Saxa asked me to do for get-pushed. i tried a few different ones but only one shape i had really afforded anything remotely useful, nothing like you see on the youtube! then i was playing hide and seek with the sun as it waltzed off behind clouds all the time, but i had fun experimenting , thanks Saxa
@jgpittenger was tricky, this is the best of the bunch . the camera kept second-guessing me, i would have had to muck around with tripod and manual focus to get it spot on. lots more play required to figure out best f-stop and focal length to use, so many variables!