The intermediate rings are not cheap, so we must demand quality. Which is then also supplied. The rings are made very accurately, everything is accurately and firmly. I myself use a zoom lens with a fixed focal length would have been probably better aperture values. Note you have to ensure that the depth of field is very low and a longer exposure or more ISO are needed. The main drawback is certainly the restriction to a certain distance, here you have no problems with a macro lens. Who likes to shoot on zoom or may move the camera back and forth, will achieve good results. Of course, the optical quality of a poor lens is not improved ;-) A tripod, at least one leg, at a large scale is required. The automatic features like auto focus and aperture are transmitted correctly. It should be noted the changed focus, infinity focus is no longer natural. The focus potential shrinks quite well, therefore the tripod. It often happens to millimeter accuracy to (but which would also be at the macro lens so!). The main work is really to find the focus point.
