jeffbuzz Offline Upload & Sell: On
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I've never seen an indexed polarizer. It could be problematic since the correct orientation requires fine adjustments. When your camera leveling position dictates the polarization position, a preset index might not allow the optimal adjustment.
What lens(es) are you using? When possible, using a lens hood prevents exactly the accidental movement you're talking about.
Another option is using a modular filter holder like Haida or Nisi. Drop-in polarizers are turned with a small adjustment wheel so are less prone to accidental movement. The whole setup is less convenient to carry compared to a single screw-in C-PL filter though.
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