Guillermo wrote: > For 6 hrs multiply time by 21.5 for a total 129 hrs Thanks Guillermo!
I knew it...! I knew that, somewhere, you might have that reciprocity information, tucked it in a hidden place I didn't really want to hear about! Now I won't have any excuse! I suppose that a 129 hrs exposure (i-e after correction for reciprocity) will disqualify me from WPPD anyways. This is well over 5 days and that takes me past PH-day deadline. Darn' it! But look! These five days have an equal number of nights during each of which the exposure requirements is many, many stops above the daytime exposure (this, of course, uncorrected for reciprocity). Which means that the uncorrected time soon gets calculated in terms of months, instead of days. But then these months, after correction, turn into at least a couple of years, themselves requiring a further adjustment. Now, I'll soon be turning 56 (totally uncorrected, as you may have guessed!) and since my daughter is expecting her first child at the end of the summer, there is a real possibility that my great-grandchildren will get to see the end of this exposure in their/their lifetime. Hmmm... I'd better get going, folks! Otherwise, if I wait a second or two, even my great-great-grandchildren will not get to see this picture! I see why the People of the Spirit never took a decision before considering the implications for their children down to at least seven generations. So long..... G't to go...! ...-:)) Guy ----- Original Message ----- From: "G.Penate" <[email protected]> To: <pinhole-discussion@p at ???????> Sent: Wednesday, April 17, 2002 10:18 AM Subject: Re: [pinhole-discussion] The Wyndham Montreal Hotel Giant Pinhole Camera Project > > ----- Original Message ----- > From: "Guy Glorieux" <[email protected]> > > > > There are no reciprocity failure charts for paper, but it is just as > > real as for film. So I'll have to make some tests before next week but > > I expect to end up with an exposure time of maybe 8-12 hrs. > > Guy, I have a reciprocity table for paper in my page > http://members.rogers.com/penate/pinsize.htm it only gives you corrections for > up to 20 minutes, but I just rapidly extrapolated some other values I hope are > of some use for you as "starting point". Here they are: > > For 30' multiply time by 7 for a total of 3 1/2 hrs > For 1 hr multiply time by 9.5 for a total 9 1/2 hrs > For 1.5 hrs multiply time by 11.5 for a total 17 1/4 hrs > For 2 hrs multiply time by 13 for a total 26 hrs > For 2.5 hrs multiply time by 14 for a total 35 hrs > For 3 hrs multiply time by 15.5 for a total 47 hrs > For 6 hrs multiply time by 21.5 for a total 129 hrs > > > The plan is to calculate the focal length/F-stop based on the weather > > outside so as to be able to open the shutter at 00:00hr on Sunday April > > 28 and to let the exposure run until 24:00hr. > > That is a wise decision! > > Wish I could be there! :-( > > Best of luck, Guy and your fellow photographers. > > Guillermo > > > > _______________________________________________ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??????? > unsubscribe or change your account at > http://www.???????/discussion/
