We Sync. that this makes good sense!
Even in these days of 'automatic everything' there is still much to be said for that golden industry-standard piece of equipment, the CLAPPER BOARD. It make sense to visually and audibly mark the exact synchronisation points in your film rather than relying totally on fallible electronic equipment (What, you don't think electronic equipment is fallible? In that case you've never argued with a computer). This inexpensive item is surely a 'must' for any director/cameraman worth their salt.
The Widescreen CLAPPER BOARD is available in two forms - the traditional model with a black background.... the 'chalk-on' model, and the latest white acrylic background type. Take you choice... either way it makes good sync.