[stoppingdown]

Yes. Already two years ago I bought some M-mount/Nikon-mount adapters, one which is only extension, and the other tilt (no shift). Basically, most of my macro work is made by means of the extension converters, which I enjoy a lot. For what concerns the tilting one, I've used it only a few times so far, but mostly because it requires a deeper understanding of things and more exercise on the field to begin pre-visualising what one wants to achieve. If one is interested, I'd recommend this approach. They are mechanical only and of different costs and quality. I've picked the cheap ones, in the range of 50-80€ if I remember well: the extension tubes are pretty fine (one maybe with an excess of lubricant), the tilt adapter plays a bit (but in the end the "play" effect is incorporated in the tilt effect).