A
arthur
>Oops, looks like I have unintentionally started a bit of a debate >here! Don, the one fact I am sure of is that where you have a >beam-splitter such as a semi-silvered mirror in the optical path, this >will polarize the light. If you consider the way we all use polarizers >to eliminate reflections from glass surfaces, then that makes perfect >sense. I own an Olympus OM4Ti, and while this camera is manual focus, >it DEFINITELY requires use of a circular PL for correct metering.
>Arthur, it is not really a matter of whether the metering is spot, >centre-weighted or matrix, it's a question of what lies in the optical >path between the subject and the metering cell(s). Your statement that >"normal C/W metering should work fine with a linear polariser" may be >true for the Contax range, because of the particular way C/W and spot >metering are implemented, but it is not necessarily true of other >brands or models.
Hi Mike
What you say is correct, could not remeber the term but I guess what I was trying to say is that for contax cameras the spot meter sensor has a beam splitter in the optical path which negates the use of a linear polariser. The C/W sensor on the Contax SLR's does not use a beam splitter so a linear polariser can be used in those cases. I don't know how the matrix metering is affected though or how spot or CW are implemented on other brands.
Cheers
Art
>Arthur, it is not really a matter of whether the metering is spot, >centre-weighted or matrix, it's a question of what lies in the optical >path between the subject and the metering cell(s). Your statement that >"normal C/W metering should work fine with a linear polariser" may be >true for the Contax range, because of the particular way C/W and spot >metering are implemented, but it is not necessarily true of other >brands or models.
Hi Mike
What you say is correct, could not remeber the term but I guess what I was trying to say is that for contax cameras the spot meter sensor has a beam splitter in the optical path which negates the use of a linear polariser. The C/W sensor on the Contax SLR's does not use a beam splitter so a linear polariser can be used in those cases. I don't know how the matrix metering is affected though or how spot or CW are implemented on other brands.
Cheers
Art