Archived posting to the Leica Users Group, 1998/12/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]On 7 Dec 98, at 14:18, Nigel B Watson wrote: > Most of my Nikkors are the manual > versions. Even they are not as solid and precise as Leica R lenses unless > periodically re-lubed to compensate for wear. With hard use Nikon lenses > wear out; I have never seen even a beaten-up Leica lens whose helicoid was > loose and sloppy. > > Regards, > Nigel Nigel, My well used manual Nikkors are sloppy to focus and my well used Leitz M focus still quite tight with no apparent slop, I assume that the main reason lies in the choice of construction materials of the focussing helicoid threads. The Nikkor helicoids are aluminium with shallow cut threads and the Leitz M helicoids appear to be brass inserts with deep cut threads. The G2 lenses (excepting the Hologon) focus via a worm screw arrangement AFAIK. Cheers, Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 Fax +61-2-9554-9259 UTC(GMT) +10 Hours audiob@ozemail.com.au