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- Name
- Brian
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I recently bought a "Kenko" brand circular polariser filter, and I'm not sure it's doing it's job correctly.
With other polarisers I've had, you can see the polarising effect by looking at the blue sky and rotating the filter (with the sun at 90 deg)
With this filter the polarising effect when viewed this way, is hardly visible.
What's more, if I view another polariser through the filter, I was expecting, as I rotated the filter, there would be a position where the combined effect of the two polarisers would produce a completely black filter, which allowed no light to pass. This does not occur, and there is only a small effect on the density of the filters.
Have I bought a duff polariser?
With other polarisers I've had, you can see the polarising effect by looking at the blue sky and rotating the filter (with the sun at 90 deg)
With this filter the polarising effect when viewed this way, is hardly visible.
What's more, if I view another polariser through the filter, I was expecting, as I rotated the filter, there would be a position where the combined effect of the two polarisers would produce a completely black filter, which allowed no light to pass. This does not occur, and there is only a small effect on the density of the filters.
Have I bought a duff polariser?