Archived posting to the Leica Users Group, 2006/06/11
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]It seems simple....light=heat....less light=less heat....f16 is less light (heat) than f1.5...Voila..Elementary my Dear Philippe :-P Philippe Orlent wrote: > Damn Walt, you got me thinking and testing. > Took a Summarit and burned within 1 sec a hole in a newspaper page at > f 1.5. > The distance was about the one to focal plane. > Did it again at f 16. A smaller circle on the newspapern but no > burning even at 10 secs. > I also think I know why. Do you? > ;-) > > > Op 11-jun-06, om 14:56 heeft Walt Johnson het volgende geschreven: > >> Vick >> >> Simply take the lens off and outside to find the solution to your >> question. Focus the sun on your arm stopped down and wide open and >> prove to yourself which is more likely to burn the shutter curtain. >> >> Walt >> >> Vick Ko wrote: >> >>> I am just back from a very interesting trip to Bangalore (too few >>> days, but >>> in a way, just enough days). Interesting to see the thread on the >>> temples...hmm. >>> >>> I was visiting my workteam, and a bit of sightseeing. The camera >>> on my trip >>> was a Leica CL. >>> >>> One question, on one day, my workteam took me out to play cricket >>> and when >>> it was "team photo" time, one of the guys took our cameras (there >>> were 2 of >>> us), stood back and took our photos. My camera was at f16, and I >>> noticed >>> that he put it face up on the ground. >>> I had thoughts of horror as I worried about the sun burning a hole >>> into the >>> shutter. I did notice that he wound the film on, so I think at >>> least there >>> was a chance of the sun, coming in at f16, hitting the meter. >>> >>> So my LUG questions: >>> >>> 1. can the sun at f16 burn a hole? I'm not wanting to try the >>> experiment >>> >>> 2. can the sun at f16 hurt my CL meter? It seems fine. I suspect >>> the sun >>> is not at its focal point for the meter face >>> >>> I did notice a discoloured patch that is off to the edge of the >>> shutter, 1/4 >>> of the way to the edge. It doesn't look like the sun "melted" the >>> rubber >>> there, maybe it was there always. >>> >>> Thanks in advance. >>> >>> Regards, >>> >>> Vick Ko >>> >>> --------------------------------------------------------------------- >>> --- >>> >>> >>> _______________________________________________ >>> Leica Users Group. >>> See http://leica-users.org/mailman/listinfo/lug for more information >>> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information >> > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > >