Fotasy Pro Pentax DA K Mount lens to Fujifilm FX Mount Camera Adapter Solid metal mount lens adapter allows Pentax DA lens to be used on Fujifilm Fuji X-Mount camera body. With On / Off Aperture Control Ring to set the designed aperture. This adapter is different from other Pentax adapters, its has an Aperture Control Ring, Its fits Pentax K / PK Mount lenses, even the lens don't have aperture control. It also fit Pentax classic lens, such as Pentax M, FA, A F Lenses. Pls note the focus and aperture of the lens has to be used manually. Brand: Fotasy