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Home✈️Aircraft🚁HelicopterAerial Photography and Video › Who uses a circulair polarisation filter?
07-18-2006 07:58 PM  14 years ago
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Menno

rrApprentice

The Netherlands

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Who uses a circulair polarisation filter?
Do any of you use a circulair polarisation filter while shooting with the heli.

I have never used a polarisation filter before and I don't know how precise it needs to be in angle with the sun and the reflection you are trying to eliminate.

I would like to use one for objects with lots of glass and shiny metal. Apart from that the filter should be great for (sky)colors.

Is it possible to use such a filter with the helicopter when you have already decided on the ground which foto angle you are going to shoot .


Thanks,
Menno
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07-18-2006 08:39 PM  14 years ago
Brian Bennett

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Dugway/Tooele UT, USA

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Removes glare or accentuates it off of reflective surfaces

Enhances apparent color saturation.

Allows you to image past relfections, through windows or a water surface (ie. fish in a pond). Again turn to filter off glare/reflection

Todays auto-focus systems require the use of a circ-pol filter rather than a conventional single film polarizer. You can use a conventional polarizer in manual mode on your newer camera set.
They are mounted typically in a double ring which allows you to rotate around its plane of transmission. Just turn it while viewing through the finder until you see the results you are looking to obtain.

You lose ca 1.5 stops of light when mounted, which may limit you with a slow lens or low asa/iso. I have mine on my two most used lenses as much as light conditions allow. Used in conjunction with a graduated ND filter one can compose dramatic landscape shots which really bring out cloud details. Nikon and B&W are my favorites, but the tiffen for the budget minded will give decent reults.

Brian
Team MRC-Hirobo and Model Avionics Rep
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