I just got a K&F Concept Nikon G lens adapter to use my old Nikon lenses with my X-T2. Everything screws in fine and clicks. I switched to MF (the little toggle on the front bottom right?), but I'm not able to take a photo. I use the EVF to manual focus with the lens focus ring, but when I click the shutter it won't let me take the photo. Has anyone ever used one of these lens adapters before? Is there something I'm missing? Also the camera things the aperture is 0, not sure if that has to do with it.