Archived posting to the Leica Users Group, 2007/12/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]AFAIK, exposure/light level goes as power of 2, i.e. each full stop adds twice as much exposure as the previous stop number. 2 in power of 5 makes 32, hence making 32 even underexposures by -5 stops each sums up into a correct exposure. Somebody please correct me if I'm wrong. Best, Alex Harrison McClary wrote: > Yes. I under exposed each time -5. Once I made 32 exposures on the > one frame that added up to the correct exposure. > > I am sure someone who is better at math can explain the why of it > better than I can. > > Harrison McClary > http://www.mcclary.net > Sent from my iPhone > > On Dec 22, 2007, at 10:01 AM, Leonard Taupier <len-1@comcast.net> wrote: > >> Harrison, >> >> Does that mean when you exposed the same frame 32 times each >> exposure was 5 stops underexposed? >> >> Len >> >> >> On Dec 22, 2007, at 10:45 AM, Harrison McClary wrote: >> >>> Getting the exposure really is very easy once you understand it. Each >>> f-stop or shutter speed change is a full stop, each stop is exactly >>> twice as much or 1/2 the amount of light. If doing multiples you have >>> to remember to underexpose correctly for he number of multiples so: >>> >>> 2x is one stop under >>> 4x is 2 stops under >>> 8x is 3 stops under >>> 16x is 4 stops under >>> 32x is 5 stops under >>> 64x is 6 stops under and so on. >>> >>> Did I explain it well? >>> >>> >>> >>> Christopher Birchenhall wrote: >>> >>>> Harrison >>>> >>>> Can I ask a silly question? How did you calculate the exposure? >>>> >>>> Chris B >>>> >>> >>> >>> -- >>> Harrison McClary >>> Harrison McClary Photography >>> harrison@mcclary.net >>> http://www.mcclary.net >>> ImageStockSouth - Stock Photography >>> http://www.imagestocksouth.com >>> Tobacco Road: Personal Blog: >>> http://www.mcclary.net/blog >>> >>> >>> _______________________________________________ >>> 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 >