HI, I am using 17-40L and Canon 5D Mark II.
I just buy the lee filter density grad soft set, lee foundation kit holder and lee 77mm adaptor ring. But I using the HOYA NDx400 with lee holder foundation set @ 17mm have the black corner ( the adaptor have cut off the 4 corner ).
Which holder and adaptor ring can solve my problem ? Cokin Z-PRO holder and adaptor will fit for me ?