What type of day/lighting when the streaks appear? Bright sun/crystal clear, bright sun/hazy, fogy, overcast, sun shinning through patchy clouds.
Possible condensation within the filter from the earlier drop, but it seems very unlikely; B+W filters are extremely well protected where the polariser sheet is sandwiched to the glass plates and sealed. I have been using B+W KSM polarisers for decades (they are also occasionally washed) and never have anything to report about faults that could be attributed to them.
I have seen this kind of thing sometimes in non-polarizer shots in large uniform areas, like sky, and I think it may not be anything to do with the optical conditions. It may be patterns of turbulence in development agitation. When I switched from a development tank with only rotary agitation to a Patterson tank with agitation by inversion, it went away.
I might be wrong, but shouldn't you be using a circular polariser, not a linear one, or is that just for digital sensors?I've been noticing some weird vertical bands with shots of the water taken with my polarizing filter. I'm wondering if anyone knows what the issue here is (ie., is it technique, equipment, or just natural phenomena).
For reference, I'm shooting with a Hasselblad, using the Hasselblad linear polarizing filter. The shot below is on B&W film (Delta 400), but I see the same issue when I shoot with my CFV back. I haven't noticed banding (not sure if this is the proper term...) with other shots taken with the polarizing filter (ie., windows, etc.), but I don't use it that much anyway.
I did happen to drop the filter in the Merced River a number of years ago. I didn't (and still don't) notice any problems with the filter visually after it dried out.
I might be wrong, but shouldn't you be using a circular polariser, not a linear one, or is that just for digital sensors?
Linear polarizer can potentially mess with auto focus systems and some in-body meters, but if properly focused and exposed shouldn’t have any different effect on the image than a circular polarizer.
Linear polarizer can potentially mess with auto focus systems and some in-body meters, but if properly focused and exposed shouldn’t have any different effect on the image than a circular polarizer.
Being the bands only occur with this polarizer regardless of recording medium used I would borrow/rent/buy a different polarizer and give it a try.
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