Why circular polarizers?

Started May 11, 2014 | Questions thread
MaxTux Regular Member • Posts: 449
Actually, "linear" polarizers may be preferred if...

Circular polarizers are required to preserve auto-focus functionality of DSLR cameras. They might also make exposure metering more accurate.

In practice however, polarizing filters are used primarily in landscape photography. There, focus is typically set at infinity, and exposure is best fine-tuned by inspection of the histogram of a test photo. If such instances, "ordinary", linear polarizers would have the advantage of cost, less thickness and slightly better optical performance.


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