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Author Topic: Circular Polarizer  (Read 2296 times)

UOduck23

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Circular Polarizer
« on: January 10, 2012, 04:59:16 PM »
Are there any disadvantages to leaving my circular polarizing filter on my 24-70L 2.8 at all times?  My current setup has the polarizing filter directly attached to the lens with a clear filter (the one I bought with the lens just to protect the glass) on top of that.  I figured why not protect the polarizing filter too.  The immediate disadvantage I can think of is that it makes it impractical to take off the polarizing filter for use on my 70-200L 2.8 II.  But are there others?

Thanks in advance.

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Circular Polarizer
« on: January 10, 2012, 04:59:16 PM »

Canon-F1

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Re: Circular Polarizer
« Reply #1 on: January 10, 2012, 05:11:57 PM »
-2 stops less light?

why not another filter to protect the protecting filter?   8)

honest im not strictly against protecting filters but if you use a pol filter you donĀ“t need another filter on top of it.


« Last Edit: January 10, 2012, 05:14:10 PM by Canon-F1 »

Policar

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Re: Circular Polarizer
« Reply #2 on: January 10, 2012, 05:19:25 PM »
You'll lose 1.3-2 stops of light (as mentioned above) and, depending on the angle, reduce specular highlights.  This can be nice (foliage at noon) or it can ruin skin tones in portraits.  Shooting LCD screens won't work, either.

wickidwombat

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Re: Circular Polarizer
« Reply #3 on: January 10, 2012, 05:22:16 PM »
and you cant stitch panoramas properly that are shot with polarisers on it makes the sky go all crazy
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dmills

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Re: Circular Polarizer
« Reply #4 on: January 10, 2012, 05:32:14 PM »
To put it another way, your nice 24-70 f2.8 and 70-200 2.8 ii becomes an f5.6ish in terms of attainable shutter speed :(
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JR

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Re: Circular Polarizer
« Reply #5 on: January 10, 2012, 06:54:20 PM »
I agree the loss of 1-2 stops can be costly in shutter speed or ISO performance in some situation.  Originally I had started to shoot with circular polarizing filter whenever I shoot outside in the sun.  I since then dialed back on their use to only use them in some situation, mostly for landscape or when I dont need to "freeze" the action.

With the polarizing filter on, I missed several shots where I needed to a higher shutter speed...They are a good tool, but I would not recommend them on all the time.
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D.Sim

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Re: Circular Polarizer
« Reply #6 on: January 10, 2012, 09:08:12 PM »
personally the only use for a clear filter would be front element protection... Mostly because that said front element is neither cheap nor easy to replace. A CPL isn't that cheap, sure, but its not gonna cost a bomb to replace either. The image degradation from the additional filter just isn't worth it... and if you really wanted to protect the filter, take it off when its not needed?

Personally I only ever take out the CPL when I want to reduce reflections... or use the lights in the sky. Even then... not always.

Its just not worth it staying on the glass long term.

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Re: Circular Polarizer
« Reply #6 on: January 10, 2012, 09:08:12 PM »

UOduck23

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Re: Circular Polarizer
« Reply #7 on: January 16, 2012, 11:22:24 AM »
I love the CR forum.  You guys completely answered my question.  Thanks.

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Re: Circular Polarizer
« Reply #7 on: January 16, 2012, 11:22:24 AM »