Archived posting to the Leica Users Group, 2011/07/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Geoff, Thanks a lot for the link. I enjoyed the tour. Jim Nichols Tullahoma, TN USA ----- Original Message ----- From: "Geoff Hopkinson" <hopsternew at gmail.com> To: "Leica Users Group" <lug at leica-users.org> Sent: Saturday, July 23, 2011 5:17 PM Subject: Re: [Leica] The IIIF still works > Hi Jim, they have done exactly that in developing new methods for sensor > calibration and RF adjustments since the introduction of the M8. No-one > measures and adjusts the sensor positioning more precisely (and > individually) than Solms. The jig to calibrate the RF is huge!. I wasn't > allowed to photograph the setup but since then they have published photos > and video . DPreview have an article and the pics here > http://www.dpreview.com/articles/leicafactory2009/ > > . > > Cheers > Geoff > > *Australia, paying for the world's carbon sins, one tonne at a time**.* > > > > On 24 July 2011 01:49, Jim Nichols <jhnichols at lighttube.net> wrote: > >> Paul said: >> >> "I think one of the advantages the M series will continue to enjoy in >> terms of performance is the ability of the designers to ignore the >> requirements of AF and IS, which has to be a huge part of current >> optical design for the mainstream companies." >> >> I agree with you, except that they must continue to improve the matching >> of >> RF to lens focus cams, in order to meet the needs of the more demanding >> focus requirements of the digital sensor. I continue to be amazed at the >> number of instances on this forum where cameras and lenses are returned >> to >> Leica for adjustment. >> >> Jim Nichols >> Tullahoma, TN USA >> ----- Original Message ----- From: "Paul Roark" <roark.paul at gmail.com> >> To: "Leica Users Group" <lug at leica-users.org> >> Sent: Saturday, July 23, 2011 10:31 AM >> Subject: Re: [Leica] The IIIF still works >> >> >> >> Mark Rabiner <mark at rabinergroup.com> wrote: >>> >>>> ... >>>> Optical science has not stood still ... >>>> >>> >>> I had an interesting discussion with a Canon technical rep some years >>> ago. He made the point that most R&D went into not making lenses >>> sharper per se, but rather making them "affordable" while still good >>> enough. That reality even affects Leica -- although at a higher >>> price-performance point. >>> >>> Along this line, it appears one of the main advances may be in making >>> molded aspherics better. One simply can't make a top notch, very wide >>> or very fast lens with only spherical elements, and the cost of >>> grinding one aspheric at a time is even out of Leica's cost structure. >>> I think what we'll see, going forward, is the move to more and more >>> aspherics -- not just a single element per optic. In line with this >>> thinking, I'd guess that the slower telephotos, where aspherics are >>> not needed, would be the area where the older Leica lenses can best >>> match the newer ones (at least in a low flare situation). >>> >>> I think one of the advantages the M series will continue to enjoy in >>> terms of performance is the ability of the designers to ignore the >>> requirements of AF and IS, which has to be a huge part of current >>> optical design for the mainstream companies. >>> >>> Paul >>> www.PaulRoark.com >>> >>> ______________________________**_________________ >>> Leica Users Group. >>> See >>> http://leica-users.org/**mailman/listinfo/lug<http://leica-users.org/mailman/listinfo/lug>for >>> >>> more information >>> >>> >>> >> >> >> ______________________________**_________________ >> Leica Users Group. >> See >> http://leica-users.org/**mailman/listinfo/lug<http://leica-users.org/mailman/listinfo/lug>for >> >> more information >> > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > >