Kowa Digiscoping Photo Adapter, iPhone 4/4S Black Provided with 41mm and 55mm rings for BD42, BD32, SV Series, TE-10Z and TE-17W eyepieces Additional adapters available It couldn't be simpler to start taking magnified images or HD video with your iPhone and optical equipment via the Kowa digiscoping adapter Simply slot your iPhone into the holder and screw on the appropriate adapter ring - that's all there is to it Limited Lifetime Warranty