Purple flare: Causes and remedies

Started Mar 1, 2013 | Discussions thread
OP Anders W Forum Pro • Posts: 21,468
Re: Purple flare: Causes and remedies

Macx wrote:

Anders W wrote:

Macx wrote:

Anders W wrote:

Macx wrote:

Well, I suppose it isn't a lens hood.


Pol-filter perhaps?

Yes, in one case. Which? And for what reason can a polarizer remove lens flare and/or its purpleness?

2nd one? Well, the flare is a reflection and as such polarised light? *guessing*

It's image two of three, yes. And yes, you are on the right track. Could you develop your thought a bit and what kind of polarizer is required in this case?

Well, since it's reflections from light that's already passed through the filter, a simple filter like the ones in polaroid sunglasses could work? A circular polarizer would probably be less effective.

Right again (I think). I used a linear polarizer. A circular probably wouldn't work in this case (though truth be told, I didn't even try so I will).

We all know that reflected light is polarized. What that means is that only light polarized in a certain way will be reflected in the first place. The idea here is to turn the polarizer so that it lets through only light polarized in such a way that the troublesome reflections later in the optical path do not occur.

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