Firstly, i wanted to buy this lens for landscape photography. I have try to searched but couldnt find any definite answer. Before i buy this lens, i would be interested to know more from forum members. My plan is to buy the Hitech Graduated Filter Kit http://www.ebay.co.uk/itm/Hitech-85-ND-Grad-Hard-Edge-Set-Cokin-P-holder-/250800449898?pt=UK_CamerasPhoto_CameraAccessories_CameraLensesFilters_JN&hash=item3a64df296a which can fit the Cokin P filter holder http://www.ebay.co.uk/itm/49-52-55-58-62-67-72-77-82-mm-Ring-Adapter-Filter-Holder-set-Cokin-P-DC21-/320811182273?pt=UK_CamerasPhoto_CameraAccessories_CameraLensesFilters_JN&hash=item4ab1d628c1 My question is will this solution work with Pana 7-14mm? Does it vignett at 7mm if i use the graduated filter kit?