OLYMPUS 8mm f1.8 Dedicated 150mm Width Holder Adapter This is a single holder adapter for OLYMPUS 8mm f1.8 Fisheye PRO for 150mm width filter holder. We also have requests for OLYMPUS hard users, and we decided to develop our products. While 0.3 inch (8 mm) uses may cause vignetting and the "fisheye correction" function reduces the angle of viewing so you can shoot without vigneting. Product Configuration: Lens side adapter main unit, dedicated case