Archived posting to the Leica Users Group, 2006/06/11
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]A nocti might be able to fire off nuclear fusion ... :) On Jun 11, 2006, at 9:56 AM, Ric Carter wrote: > Because f2 lets in 32 times more light than f16! > > Ric Carter > http://gallery.leica-users.org/Passing-Fancies > > On Jun 11, 2006, at 9:18 AM, 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 > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >