Archived posting to the Leica Users Group, 2001/02/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Add that to eyesight that may be fractionally off and focussing errors can be very easy to achieve. 1/4 inch is not much to play with. I sometime have hit and miss focussing with the Noctilux at f/1, given a mixture of low light, bad eyesight and no depth of field worth mentioning. Simon John Collier wrote: > Wide open and focused close, the depth of field of the 75/1.4 is between 6mm > to 8mm (just over a quarter inch). This is remarkably difficult to calibrate > for and, what amazes me, is that it can be done. Gerry at Kindermann Canada > sometimes has to have the whole kit so that everything can be calibrated > correctly. > > John Collier > > > From: Andrew Moore <dmm@bronze.lcs.mit.edu> > > Reply-To: leica-users@mejac.palo-alto.ca.us > > Date: Tue, 6 Feb 2001 13:39:19 -0500 (EST) > > To: <leica-users@mejac.palo-alto.ca.us> > > Subject: [Leica] how can the 75 Lux focus go bad? > > > > > > I keep hearing people's accounts of their 75 Summiluxes focusing in front > > of or behind the intended point of focus (recently 4 people and 5 lens > > samples). In a couple cases the lens (alone) was sent out for repair and > > came back working. > > > > When these lenses go out of spec, what exactly is happening to them? > > > > --Andrew > > NO ARCHIVE > > > > > >