Archived posting to the Leica Users Group, 2005/04/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]http://volcanoes.usgs.gov/Hazards/What/VolGas/SO2Aerosols.html http://volcano.und.edu/vwdocs/current_volcs/current.html and the big daddy of them all: http://www.drgeorgepc.com/Vocano1883Krakatoa.html At 05:19 PM 4/10/2005, Rick Dykstra wrote: >So there's this thing called Global Dimming, caused by soot and particles >from exhausts, aero engines and industry, which has caused an increase in >clouds (reducing the immediate impact of Global Warming) and causing a >major reduction in the amount of sunlight reaching the surface of the >earth. It must be true - I saw it on telly. It was the immediate >aftermath of 9/11 that brought it to prominence - the skies were suddenly >much clearer without all the air traffic - and temperatures rose noticeably. > >Anyway, the measurable differences in light levels in various places >around the world, now vs 50 years ago, is huge. Like 15% on average and >up to 25% in some places, such as Russia. > >So, has anyone noticed the difference? Do the rule on thumb exposure >methods leave you with underexposed shots now? It was Doug's post on >using an SL body for K25 that prompted me to mention this. Is there >enough light anymore for such slow films? > >Maybe Global Dimming will be Leica's salvation - fast lenses will be all >the go. ??? > >Rick. > >_______________________________________________ >Leica Users Group. >See http://leica-users.org/mailman/listinfo/lug for more information