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Old Apr 25, 2011, 1:32 AM   #1
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Default Is 48mm Drop in Circular Polarizer Filter needed?

Hi...

A friend of mine has has a Canon EF500mm f4.5L USM lens which he is not using and wants me to buy it from him. This is a beautiful lens for bird photography. He dose not have a polarizer filter, is it important that I buy one? I feel it will not be of much use since by adding a polarizer I will have to go 1 or 2 stops higher which will reduce my shutter speed. Please advice...
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Old Apr 25, 2011, 9:11 AM   #2
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A polarizer is one of the few filters that cannot be reproduced in software.
When used for its intended purposes, like cutting through reflections in water.
It is very useful. You do not need to leave it in the lens all the time!
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Old Apr 25, 2011, 1:00 PM   #3
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Quote:
Originally Posted by PeterP View Post
A polarizer is one of the few filters that cannot be reproduced in software.
When used for its intended purposes, like cutting through reflections in water.
It is very useful. You do not need to leave it in the lens all the time!
This is a big lens and is used mostly for wild life or bird photography, using a polarizer filter means going 1 or 2 stops higher means less shutter speed.....I want to know do people use it ??
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Canon Digital EOS 60D D-SLR
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Sigma 105mm f2.8 EX Macro
Tokina 11-16mm f2.8 Wide angle
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Old Apr 25, 2011, 3:56 PM   #4
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If you do want to make the sky blue it can be helpful. But you do not need to use it all time. I only use my cpl's when I want to cut glare or want a deeper blue sky. So if you do not need this, you really do not need one. Also to get the blue effect in the sky it has to be a very clear day, where the 2-3 stops does not mean much.
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Old Apr 25, 2011, 11:23 PM   #5
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Exactly!

Quote:
Originally Posted by shoturtle View Post
But you do not need to use it all time.
Also if needed you can just bump up the ISO a stop or two. I am not familiar with the 60d but shooting at ISO400 instead of ISO100 should not make any visible difference.
A polarizer is the one filter I have for every lens I own.
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Old Apr 26, 2011, 10:01 AM   #6
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I'm not a serious birder but I suspect polarizers are not often used by birder because of one or two stops loss in light and it would difficult to adjust for BIF in any case. A CPL might be used with perched birds with enough prior planning.

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