I'm trying an older canon FD lens on my camera with an adapter. The lens is a 500mm f8 reflex. All said & done it works fairly well. The new digital camera won't register the apeture and won't meter the light, so you have to adjust everything manually, including the focus. The first picture is through a window and screen. The hydro pole is about 100m away. The second picture was taken indoors, same lens about 3m away ( hand held ). So far I'm impressed.