I am looking into getting my first medium format camera, and look for a camera which - first of all gives me much joy... - does not cost much used ( MF ) - can get a big range of very good but inexpensive lenses for it - is rather light and small and please advice me which other points should be important... The Pentax 645? but I am also curious about the Pentacon 6 and Russians, e.g. Kiev 6, Kiev 88, Saljut S... Which should be the best/cheapest/lightest beginners camera that uses great lenses? If these lenses can be used for a later upgrade in body the better!