The bracket, that came
with the Robo-Focus, was very easy to bend and attach to one of the
viewfinder bracket holes. The only modification, to the
bracket, was a quick hit with a rotary grinder so the screw would
fit through the slot. Then all I needed were a few washers, for
spacers, and a longer stainless steel screw.
If you need to also
mount the finder scope, special brackets can be found by searching