Archived posting to the Leica Users Group, 2006/06/11
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Philippe You burn holes in shutters at wide open apertures. so the smaller the aperture the small the risk..BTW f16 is much smaller aperture than f1.5...bigger number but smaller hole... ;-) Walt Philippe Orlent wrote: > Weren't you saying then -contrary to me- that the smaller the lens > opening was, the higher the risk? > If not, then I misinterpreted you from the start. > > > Op 11-jun-06, om 17:56 heeft Walt Johnson het volgende geschreven: > >> 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 >>> >>> >> >> >> _______________________________________________ >> 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 > >