Delivery a bit long but the seller had informed. product from Hong Kong. quality not the same as from home but for Cokin $ 2.50 with delivery we will not complain at all. Mounted on the PENTAX 12-24 my door is always visible when positioned at 45 ° and 12 mm focal. ok 0 ° and 180 ° or if you zoom slightly (invisible to 15mm)