What is the difference between linear & circular polariser ??:embrass: I have a CPL, I used it when I took portrait, realised the skin tone turned out to be a little "bluish", my WB was set to auto. is this normal ?? or I shouldn't even be using CPL for portrait in the 1st place:cry: :cry: I eventually I have to use PS to re-gain back the skin tone.
Diff between Linear & circular polariser
- Thread starter enyu
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You can't use a linear polariser on modern AF cameras.... they will screw up the autofocus. Use a circular polariser instead, unless you are using a manual camera and couldn't care less about autofocus, cos linear polarisers are cheaper.
The blue tint might be a result of your polariser, if you are using a cheap version where the glass is non-neutral, but I suspect a more likely culprit is your WB. You shooting under artificial (florescent/tungsten) light?
The blue tint might be a result of your polariser, if you are using a cheap version where the glass is non-neutral, but I suspect a more likely culprit is your WB. You shooting under artificial (florescent/tungsten) light?
AFAIK, the blue tint is characteristic of Cir-Pol. Even the expensive one have that.justarius said:
Regards,
Arto.
i normally use my CPL when i shooting outside, to make the sky, water and greenery look more vivid and better
Klose said:Wrong :nono:. CP "cools" the image down thus giving the blue tint.
Is it? I've never noticed that before though, in the few occasions where I use a CP. How does a CP cool the image down? I thought a CP primary purpose is saturation of colour and control of reflections....
Y wld u use a CPL on portraits in the first place?
The only reason is unless u are taking the person thru glass or windows.
The only reason is unless u are taking the person thru glass or windows.
He means if UV and CPL are stack together, it will be vignetting. So only use CPL to avoid vignetting.nyxx88 said:
Regards,
Arto.
CPL sometimes useful when the environment is too bright and you want to use bigger aperture. ASA already lowest, shutter speed the highest, but you still get f/8. CPL can act like ND4. Using CPL you might can get f/4. Ok, it will cool down the photo (bluish tint), but you can always play with WB to warm the photo.esmondng said:
Regards,
Arto.
Artosoft said:
Oh yah. haha tks arto! Now tat u mentioned it....:bsmilie:
but i nv get the chance to try it out yet. :dunno: but i'd probably use the ND anyways.
You are welcome.esmondng said:
In the beach, if you are using CPL, you also can make the sky more blue. But, take a note, it is good to use CPL when the sun is behind you, the effect of CPL is more strong. Meaning in the morning or afternoon, not in 12 o'clock time, where the sun is on top of you.
Regards,
Arto.
You are welcome.enyu said:
One thing about vignetting, it is not because the bad design of lens. It is because too many filter stack on it, so it will block the area (corners) that should be fully captured by camera's sensor. It is most happend on Wide Angle (lenses). It is similar like you put Tele's lens hood to Wide Angle lens.
Regards,
Arto.
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