pahtspix wrote:
Most good L-Brackets DO in fact have a dovetail ARCA type "groove" as part of thier design and each side of the "L" can easily be mounted to an ARCA type clamp. Another advantage to a L-bracket, is that your "view" stays in " center" when you are shooting in BOTH portrait and landscape mode..You do not have to re-compose due to flopping the camera to the side!!
Vertical vs horizontal require you to recompose. Will not height of lens vary upon changing? Flipping head is such a miniscule difference except for macro and even then recompositon would be required.