Recently picked up the Sigma 150-500 lens for a trip to Africa. I'm a big believer in "scratch the filter, not the lens"...so ALL my lens get a UV filter before I put the lens on the camera. That said, all UV filters are not created equal. Many discolor or scratch easily...this one doesn't. After three weeks in the bush, and six subsequent months of usage, no issues whatsoever. If you get the above lens, get this filter with it. You'll be glad you did.
Très bon filtre Sigma UV Multicouches DG de 86mm comme à l'habitude par la marque. Attention il ne s'agit pas d'un slim comme pour les autres dimensions plus petites. Mais cela n'a aucune importance puisque que ce filtre de protection va sur mon télé-zoom Tamron 200-500. Etant partisan des filtres UV de protection, les filtres UV multicouches (DG maitenant pour DiGital) de Sigma remplissent parfaitement leur rôles à des prix raisonnables. Cette gamme de Sigma équipe et protège à divers diamètres tout mon parc d'objectifs. Cela m'a déjà sauvé quleques lentilles avant et facilite aussi grandement le nettoyage après une sortie.
Bought this for my new Sigma 150-500 mm Zoom lens. It has a 86 mm front element thread. Filters of this size are quite expensive. This was moderately priced and quite a bargain. I was suspicious of the multi coating. Filter arrived and it indeed seems multi coated. I attached it to the lens and it looks like a wonderful protection accessory. Glass quality and the ring seem very high. Very pleased.