Good processed thread, so that the filter is absolutely dustproof mount on my Tamron AF 70-300 Di VC USD SP. Even with our 3-week Africa trip incl. Safari game drives the UV filter has served its purpose and protected the Tele from dust, scratches and damages. Also in picture quality no difference was observed for me as an amateur photographer with "normal" claims on the monitor looked recordings with / without UV filters were each perfect!
Strong buy recommendation for normal users and amateur photographers!