Circular Polarizing Filter

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Paul
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Under what circumstances would you need to use this kind of filter, i know i need one for my outdoor work, but as to when to use one i am uncertain.




Best regards Paul
 
A CPL darkens blue sky, letting clouds stand out, darkens foliage and cuts relections from water/glass etc. You can dial in the effect by watching it through the viewfinder as you rotate the filter. They can be very useful in the right circumstances, but it's easy to overdo it, and they reduce light transmission. I have one, but I only use it occaisonally. Why not shoot for a bit and then decide if you really need one?

Get a decent one if you do go for it. The best are very expensive, but steer clear of low budget CPLs, because they can cause more problems than they solve. Hoya/Kenko Pro are pretty good, and reasonably affordable.
 
As I believe, I could be wrong however but I think it will give you the general idea... A polarizer will give you increased saturation whilst cutting down reflection and glade from metallic objects/glass and water surfaces (depending on the angle). You will however lose about 1.5/2 stops of light, which could be useful in very light situations where you wish to use a larger aperture, or a hindrance in low light situations.

Hopefully someone will explain it in a much better way than I can - or even correct me :)
 
Great for sunny days with fluffy clouds to make skies blue with whire clouds. Pops out colours on sunny days and improves saturation, can't be replicated well in PS.

Good for holding back reflections in water, windows etc.

Works best when shooting at 90 degrees to light.
 
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