I am interested in Macro Photographing and had read John Shaw´s excellent book Closeups in Nature. There he mention that Minolta has a good focusing rail. This is now discontinued and could be difficult to get hold of. I have sometimes seen advertised Minolta focusing rail on ebay, and also focusing rail with bellows. How is this Minolta focusing rail is compared to the newer Novoflex model and also Kirk an RRS rails. In my opinion this old Minolta focusing rail are at least as good as the newer focusing rail. I hope there are some Minolta veterans out there who could help me with this matter. Thanks in advance.