[rollei_list] Re: Question about Rollei Filters and compensation

At 03:37 PM 11/28/2005 -0800, you wrote: 
Peter.

No, according to Mannheim, the Rollei Mittel-Gelb has a factor
of 3, the orange has 6. or to put it in EV terms, reduce the EV
by 1.5 and 2.5 respectively.

The numbers on the Rollei filters refer to EV settings, not filter factors.

As Don Williams suggested, put the filter in front of your meter cell. Works for me.

It also works underwater, even for color film. I use a CC20R or CC30R filter in my Rolleimarin, and I have made up laminated (waterproof) filters from the same gel stock for use with my light meter. This really helps kill the blue-green down to maybe 20-30' in clear water. Beyond that there isn't enough red-end light to make an available light exposure, so artificial lighting is in order. (My Rolleimarin filters are self-made, using thin flat glass blanks, clear epoxy, Wratten gels, and a vacuum system which assures no bubbles in the assembled sandwich.)

Jerry

"Peter K." wrote:
Quick question for the RUGites here.I have a Yellow (mittel) filter and an orange filter.With B&W film, is using a -1 stop for the yellow and -1.5 stop for the orange correct? Thanks.


--
Peter K
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Don Williams
La Jolla, CA

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