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Author Topic: Do Fisheye lenses use polarizing coatings  (Read 3195 times)
BartvanderWolf
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« Reply #20 on: October 13, 2012, 06:02:55 PM »
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A linear polariser won't solve the 'angle' problem either.  It has nothing to do with the type of filter, as has already been stated.

That's correct. The only angle that makes a difference is the angle of view relative to the sun, which has the maximum of blue skye polarization at 90 degrees from the direct sun angle.

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Fike, since all polarisers have to be rotated for maximum effect based on polarisation of reflected light coming into the lens, it would do no good to put a polarising type of coating on thefront element because it ould not always have optimal effect.

It is indeed unlikely that a polarizer would be somehow built in, it even doesn't make sense if it can't be manually rotated.

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It is possible that your two fisheye lenses have different types of anti-glare or similar coatings due to the extremely wide angle the lens is taking in and these types of lens coatings can impact contrast and colour.

I think it is more likely that the extreme angle of view triggers the light meter to reduce exposure (because it picks-up a lot of lightsources). That reduced exposure would be rendered as a darker, more saturated, sky.

Cheers,
Bart
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