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Thread: Circular polarizing filter<<help>>

  1. #21
    Member BlueBull's Avatar
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    Default Re: Circular polarizing filter<<help>>

    Hoya has a CPL with UV built-in. Not cheap though.
    Nikanon D3FXMarkIIIDS-1H with 5000mm f/128 & 0.500mm Macro f/0.4 & 0.70-2000mm f/256

  2. #22
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    Default Re: Circular polarizing filter<<help>>

    Quote Originally Posted by BlueBull View Post
    Hoya has a CPL with UV built-in. Not cheap though.
    those are mainly for film... in digital UV filter just serve as a protection and can be neglected.

  3. #23
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    Default Re: circular polarizing filter<<help>>

    so cannot see the screen means it kena polarized?
    meaning if u keep it tt way(dun turn anything) n shoot the sky it will be the richer blue?

  4. #24
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    Default Re: circular polarizing filter<<help>>

    hmm... means at 90 degree is where your ear is pointing at?
    if i am not wrong this will give u the maximun colour richness?

  5. #25
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    Default Re: Circular polarizing filter<<help>>

    Quote Originally Posted by catchlights View Post
    just some reminders.

    polarizing filter able to minimize reflections in many areas, but unable to remove reflections on metallic surface, highlights or hotspots.

    if you don't believe this, then you can try on a mirror to see whether are you able to remove your own reflection.

    and also, stack two polarizing filters together will not make blue sky bluer, don't believe? anyone want to try it out and tell me what will happen?
    you get a lens cap?
    “How fortunate for leaders that men do not think.” - Adolf Hitler

  6. #26
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    Default Re: Circular polarizing filter<<help>>

    2 shot for cross ref.




    i dun think i see much difference except the reflections.
    Last edited by noob117; 3rd April 2007 at 07:17 PM.

  7. #27

    Default Re: Circular polarizing filter<<help>>

    you are not shooting at a nice angle. for the polariser to have the maximum effect, the sun must be at right angles from where you are pointing the lens at.

  8. #28
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    Default Re: Circular polarizing filter<<help>>

    hmm... i dun get wad u mean.
    right angle to where? up down or left right?
    mabi a diagram might help me?
    thks

  9. #29

    Default Re: Circular polarizing filter<<help>>

    Quote Originally Posted by noob117 View Post
    hmm... i dun get wad u mean.
    right angle to where? up down or left right?
    mabi a diagram might help me?
    thks
    for example, if the sun is above you, basically, everything you shoot at the horizon will have that nice "polarised" effect, cos the horizon is at right angle to the sun.

  10. #30

    Default Re: Circular polarizing filter<<help>>

    hopefully this will explain abit.

    http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
    Last edited by satay16; 3rd April 2007 at 07:29 PM.

  11. #31
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    Default Re: Circular polarizing filter<<help>>

    i get it.
    but u dun necessarily nd to folo tt rule right?
    n one more thing if the sun is setting on the horizon then the max effect is there when i shoot right up into the sky?

  12. #32

    Default Re: Circular polarizing filter<<help>>

    Quote Originally Posted by noob117 View Post
    i get it.
    but u dun necessarily nd to folo tt rule right?
    n one more thing if the sun is setting on the horizon then the max effect is there when i shoot right up into the sky?
    haha, yeah, so basically, the polariser is useless at this times. people loves to use polarisers at around noon.

  13. #33
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    Default Re: Circular polarizing filter<<help>>

    i see so if u takign a sunset then its no use coz the sun will be in the frame?

  14. #34
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    Default Re: Circular polarizing filter<<help>>

    hmm... i dun get wad is in the link??hyperphysics or sumthing?

  15. #35

    Default Re: Circular polarizing filter<<help>>

    Quote Originally Posted by noob117 View Post
    hmm... i dun get wad is in the link??hyperphysics or sumthing?
    hmmm.........the part about polarization by reflection. basically, the angle we are trying to find is a brewster angle. and that angle, reflected light from the sun off your subjects is perfectly linearly polarised. so this allows maximum blockage of reflected light off your subjects, thus increasing contrast on your picture.

  16. #36
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    Default Re: Circular polarizing filter<<help>>

    Quote Originally Posted by satay16 View Post
    hmmm.........the part about polarization by reflection. basically, the angle we are trying to find is a brewster angle. and that angle, reflected light from the sun off your subjects is perfectly linearly polarised. so this allows maximum blockage of reflected light off your subjects, thus increasing contrast on your picture.
    i see
    so mainly it's the reflection problem la

  17. #37

    Default Re: Circular polarizing filter<<help>>

    Quote Originally Posted by noob117 View Post
    i see
    so mainly it's the reflection problem la
    yeah. why polariser makes grass greener and sky blue is because it blocks out reflection from the foilage and reduces light from the sky (light that "glares" the blue sky to make it white, which is what you dun want).

    edit: why it reduces light from sky is because the light you see in a clear blue sky is actually partially polarised too.

  18. #38
    Senior Member xunjas's Avatar
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    Default Re: Circular polarizing filter<<help>>

    Quote Originally Posted by Galdor View Post
    That's quite common. Remove your UV filter when you're using your CPL or get a ultra slim UV filter instead.
    yup.. ~~

  19. #39

    Default Re: Circular polarizing filter<<help>>

    Quote Originally Posted by noob117 View Post
    2 shot for cross ref.

    i dun think i see much difference except the reflections.
    The neighbouring block sure looks better w/o the reflection (1st pic). Anyways the sky in the 1st pic looks darker, i tink it's not because of the effect of the filter, but the presence of the filter.

  20. #40
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    Default Re: Circular polarizing filter<<help>>

    Quote Originally Posted by satay16 View Post
    yeah. why polariser makes grass greener and sky blue is because it blocks out reflection from the foilage and reduces light from the sky (light that "glares" the blue sky to make it white, which is what you dun want).

    edit: why it reduces light from sky is because the light you see in a clear blue sky is actually partially polarised too.

    Could it be due to the timing?

    As in, TS took the photo in a cloudly (read:not bright or sunny) day?

    OT a bit,

    1) Do we really need to turn the cir pol filter even though it isnt a gradual type?
    2) How much for a ultra thin UV filter? I dun bare to take my UV filter out and change to Cir Pol. Troublesome also....

    Thanks

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