Archived posting to the Leica Users Group, 1998/09/30
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]When my Gossen F2 reads a polarizer at max effect, it very consistently sees it as 1.8 stops. Jim At 03:06 PM 9/30/98 -0400, you wrote: >In a message dated 9/30/98 2:00:50 PM EST, aghalide@panix.com writes: > >> You can do the two-filter deal with all M cameras, but only with >> the through-lens meter ones can you also adjust for exposure due >> to increased filtration density. How do people do this QUICKLY. >> Ed > The problem with a polarizer is that the light-loss >(filter factor) is continuously variable throughout the rotation of the filter >as it darkens progressively the more pronounced the polarization effect >becomes. With either a 2-filter or a flip-out filter, the best way I've found >is to rotate the filter to the point I want, and then put the cell of my >handheld meter right up to the filter and take the reading through it. If >your're "guesstimating" exposure, it's usually between 1.5 and 2 stops >depending on the amount of polarization. > >Jay > Jim Brick (650) 470-1132 http://www.photoaccess.com