Is there an adapter that will allow me to use my two manual focus Zeiss lenses (15 and 21mm Nikon F mount) with my A7rII? I would like to be able to control the lens aperture in the camera. I hear very mixed reviews about the Fotodiox Fusion Adapter. Vello says its adapter will not work with Zeiss lenses. I would love to hear from people who have actually tried this combination. Thank you.