Archived posting to the Leica Users Group, 2000/11/17
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Tina Manley wrote: > > At 11:43 AM 11/17/00 +0000, you wrote: > > >An aside to Tina: What instrument do you use to measure darkness? ;-) > >Nick. > > O.K., Nick. I tried it again. I am using a Minolta IV F Auto Meter. I've > entered 3200 as the ISO and 1/125 as the time. In room light, without the > UV filter in front of the meter I get an f number of 2.89. With the UV > filter, I get an f number of 2.86. Not much difference, it's true, but > enough to matter when you are taking pictures in the dark! In my dark > hallway, with an ISO of 3200 and 1/30, I get a reading of 1.0 without the > filter and a reading of "under" with the UV filter. > > Tina > > Tina Manley, ASMP > http://www.tinamanley.com Tina and all instead of testing our meters with the UV filter why not test our film. Got into a low light situation (dim the lights in the room you are in) and do a shot with and without the UV filter at f1, a 15th of a second. (I'd use a tripod) Then look at the neg and see how much shadow detail is lost. Pull out your trusty Heathkit densitometer! Better yet make a print with the fitlerlesss neg and then put the other neg in. I suppose we might have been also testing our shutter then as well? never mind. mark rabiner :) http://spokenword.to/rabiner/