Hi all
To add to what James Morton said...
Two small flashguns is a good idea as some shadow will occur, I used a
ringflash many years ago which mounted on the filter thread, giving almost
shadowless illumination.
A minor disadvantage of this was that the colour rendition of the flash
caused a golden tinge to all pictures (the flash was originally designed for
some sort of medical photography). I tried all sorts of filters to correct
this but none produced pleasing results.
My final solution was a narrow strip of blue cellophane cut from a toffee
wrapper, simply taped across part of the ringflash diffuser.
Regards From:- Dave Cushman, G8MZY
Beekeeping and Bee Breeding, http://website.lineone.net/~dave.cushman
IBList Archives, http://website.lineone.net/~d.cushman