pemongillo there is also a nikon adapter with a filter drawer. Just remember that with this type of autofocus lens you will have to find a way to hold the apeture lever wide open. This also is not the best lens for astro as it has a lot of purple fringing on bright objects. I have this lens and it is awesome and a very sharp lens for daytime photography. The Rokinon 135 f2 lens is the best at that wide focal length. 
