Archived posting to the Leica Users Group, 2009/01/07
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Chris ,never occured to me before but you are the person to inquire about the health hazards of the kodak aero ektar 175 /2.8 lens?I have read many articles about it but didn't find anywhere howfar one has to be away from thorium glass lets's say in a bedroom to have negkigable health risk. Best simon jessurun On Wed, Jan 7, 2009 at 9:23 PM, Chris Saganich <chs2018@med.cornell.edu>wrote: > Phill, > > Scary really, the one I disassembled had a haze of extremely fine particles > coating the mirror, much like the haze in an old lens. I'll have to > reevaluate some of my film developing conclusions since I use the scanner > to > determine things like relative acutance and edge effects from > developer/film > combinations. Hmmm. > Chris > > At 01:13 PM 1/7/2009, you wrote: > >> Chris Saganich wrote: >> The clue was there in the previous discussion when someone wondered >> why the bleeding was reversed from conventional film developing. It makes >> sense now. Now we know, thanks again. >> ================================= >> >> That was me, Chris. At the time I thought about the possibility of a >> scanner problem but didn't follow up in my comments. >> Impressive to see the difference a clean mirror can make. >> >> -- >> Phil Swango >> 307 Aliso Dr SE >> Albuquerque, NM 87108 >> 505-262-4085 >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > > Chris Saganich MS, CPH > Senior Physicist, Office of Health Physics > Weill Medical College of Cornell University > New York Presbyterian Hospital > chs2018@med.cornell.edu > http://intranet.med.cornell.edu/research/health_phys/ > Ph. 212.746.6964 > Fax. 212.746.4800 > Office A-0049 > > > > > > > > > "I am the radiation" > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >