Archived posting to the Leica Users Group, 2000/12/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Frank wrote in part: >Erwin, in these days of vertical RF adjustment being off on a brand new >camera, I think that all new Leica buys needs to be checked. We can not >assume they are correct direct from the factory. I disagree. First of all, the vertical misalignment is inconsequential as far as RF accuracy is concerned. Mind you: it is not OK, but more of nuisance than a functional error. This is another myth. The vertical alignment has no relation to the RF accuracy. If your lens focusing five feet beyond your implied plane of focus, than there is someting rotten in the state of Denmark (free from Shakespeare). Then of course a check of the lens/body combo is in order. My remarks were related to the proposition that the Noct or the 1.4/50 or 1.4/75 needed specific (lens related) adjustments, which is not correct. The bayonet flange is machined to an accuracy of 1/100mm, the RF cam has a tolerance of 1/100mm too and the lens is adjusted to get maximum contrast at 30 lp/mm. These measures ensure exact focus with any lens/body combination. Of course a failure like yours is a bad instance of missing QC for your lens. I would without any doubt accept, that the bodies/lenses as delivered from the factory are within specs. And your proposal that we need to check every lens/body combination is several bridges too far. To infer from a few bad examples that the state of Leica quality is below any reasonable industry norm is untenable. If Leica cannot hold a machine tolerance of 1/100 mm in general, they should close the doors immediately! Erwin