Hello list What is "back focos"? Does the camera focus closer to or further away from where it should? Which lenses are especially prone to back focus on a *ist D? Only "analog" lenses? Please
A friend asked me. I don't know, so I ask where I expect people (you guys) to knoe the answer :-) Regards Jens Jens Bladt http://www.jensbladt.dk -----Oprindelig meddelelse----- Fra: Adam Maas [mailto:[EMAIL PROTECTED] Sendt: 1. december 2005 03:44 Til: [email protected] Emne: Re: Why I Haven't Yet Switched I think you mean IBM processors. HP's never made a PowerPC processor, rather they had PA-RISC and now Itanic. And price a Power4 system someday. The Mac is significantly cheaper for equivalent performance (Well, if you match the number of Cores, Power4's are multi-core, PPC970's are single or dual core only). -Adam graywolf wrote: > Gee, BSD, works for that? Well I'll be hornswaggled. HP processors, > BSD (Unix) operating system, PC components. Yep those Macs are really > something special. > > Before OS X you could not have given me one. Now that they ahave grown > up I would like to have one myself. Someone send me the money. > > > graywolf > http://www.graywolfphoto.com > "Idiot Proof" <==> "Expert Proof" > ----------------------------------- > > > > Godfrey DiGiorgi wrote: > >> >> On Nov 29, 2005, at 5:29 AM, Rob Studdert wrote: >> >>>> ... Our nearby university, and my alma mater, Virginia Tech just >>>> recently >>>> built a supercomputer by interconnecting some humongous number of >>>> high-end desktop machines. They used Macs for this project in spite >>>> of the higher costs, primarily because of much greater reliability in >>>> their experience. It works great and some other universities are >>>> following their lead. >>> >>> >>> >>> Again interesting, I hadn't heard of Mac farms usually they tend to >>> use PC >>> servers running some form of UNIX, maybe they are now harnessing >>> the UNIX side >>> of the Macs now that the OS has grown up? >> >> >> >> Do a search on "virginia tech supercomputer". Their teraserver, in >> 2003, was the third-fastest supercomputer in the world, comprised of >> 1100 Power Macintosh G5 2Ghz DP boxes coupled together with some >> extreme high-speed communications equipment. It runs Mac OS X. >> >> Modifications to Mac OS X were extremely small to achieve this: they >> dropped in a revised memory allocator (standard one is optimized for >> balanced performance on a client system, a distributed supercomputer >> requires a different optimization strategy to maintain maximum >> throughput). Total change was 800 lines of source code (I was on the >> team that assisted in this project). Later versions are even faster >> since they moved to the Xserve box instead of the desktop system. >> >> Many other universities and labs have built distributed >> supercomputers based on this effort's success. >> >> BTW: Discussions that resolve to more inane "mac vs pc vs linux vs >> who-knows-what" babble are really not worth the time to read. >> >> Godfrey >> >>
