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Old Feb 24, 2004, 10:47 AM   #11
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A UV is for protection and slight decrease in haze...

While a polarizer should work, it's not recommended to put it on the 50-500 unless it's extremely sunny since the lens already has a slow aperture to start with (beside have you priced an 86mm polarizer?), especially if you are on a small boat! :?

BTW if everyone shoot in RAW, they don't need to worry about any white balancing until they get back to the comfort of their home PC! :lol: :lol: :lol:
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Old Feb 24, 2004, 3:34 PM   #12
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Would this be a useful filter for taking a lot of shots on a lake with the Sigma 50-500

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Old Feb 24, 2004, 3:41 PM   #13
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From the above link:
Haze(UV) filters are wise initial investments. They help protect your valuable investment from dust, moisture and scratches, which can lead to costly repairs. If desired they can be left on the lens at all times for protection. Haze filters provide additional benefits of correction for Ultraviolet(UV) light which can register on film and videotape as a bluish cast and can obscure distant details. Ultraviolet filters allow you to correct for the UV effect to varying degrees.

The UV-Haze filter is helpful when photographing mountain and marine scenes, where increased haze threatens to make your photographs indistinct in color and clarity.
Personnally I put KR1.5 on my lenses because of the additional warming effect (but remember we're in digital land now). You might want to pay extra for the Multi-Resistant Coating for anti-glare as well: http://www.bhphotovideo.com/bnh/cont...u=11838&is=REG

... and also FYI http://www.bhphotovideo.com/bnh/cont...=234378&is=REG
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Old Feb 26, 2004, 12:59 PM   #14
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Default Circular Polarizer

I have the 10D and a Quantaray 62mm Circular Polarizer. My question is, the outer ring of this filter rotates and has a triangle indicator. Preumably, you can rotate this ring to achieve different effects. There's no documentation on how to use this feature.

How do I know WHEN to rotate it? etc...

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Old Feb 26, 2004, 1:08 PM   #15
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The filter is called a circular polarizer because it rotates, and rotating it chenges how it affects the polarized light bouncing off stuff.
Old timers probably remember linear polarizers... those filters blocked polarized light without having to be rotated, but were quite detrimental to the functionality of ttl metering.
Before I get carried away with the science of a circular polarizer, just try this:
Point your camera at some kind of reflective surface (ie glass water ect) and rotate the polarizer until the reflections that you dont want are eliminated. Also remember that polarizers work best at a 90 degree angle from the light source off a reflective surface. Hope that helps!
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