A&P Learn me about polarizers...

Discussion in 'Lifestyle' started by Waddup you?, Apr 8, 2010.

  1. Waddup you?

    Waddup you? OT Supporter

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    Lately I've been shooting outdoors, and its usually high noon, and in not the best conditions.

    per this post, what is the actual difference between a warming polarizer and a regular polarizer. also, what is the difference between a linear and circular polarizer?

    my main question, in regards to the last question is, I have a d80 with mf lenses, and from what the internets say, is that af cameras need circular plarizers for the metering system to work properly. well, with mf lenses on a digital body, that goes out the door, correct? Im thinking about it too much for it to be obvious to me... :o
     
  2. Wobistdu

    Wobistdu Guest

    i dont know about linear ones, but i recently got a warming CP. the hoya moose 77mm. it is amazing.

    [​IMG]

    [​IMG]

    They really cute the haze, giving nice formed clouds and distance objects. The warming one also seems to keep the sky decently blue without making it extremely dark.
     
  3. Bukka

    Bukka Active Member

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    Stay away from Linear Polarizers
    Due to the way digital camera metering and autofocus systems work, it can interfere with one of, or both those systems.

    Stick with circular.

    As for warming VS regular, I'm not exactly sure what the advantage is.
    One would think you can alter with whitebalance, but I'm sure it probably has some effect on the turn out of your colour histograms in some way.
     
  4. adamlewis88

    adamlewis88 New Member

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    How about CPLs on UWA lenses? Ive always heard you shouldnt use them because you get uneven polarization? It makes sense when thinking about polarized reflected light...Ive just never actually seen the result of trying.
     
  5. jackjohnson

    jackjohnson simple as something nobody knows OT Supporter

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    got my hoya warming (moose) circular yesterday– bought one after leetpilot's recommendation. Haven't been able to test it out much besides a short little walk but so far I think I'm going to be pretty happy about it.

    I shoot 90% outdoors and i'm tired of underexposing -2/3 to 1 stop and correcting in PP.
     
  6. jackjohnson

    jackjohnson simple as something nobody knows OT Supporter

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    also I bought my hoya filter from eventcameras on ebay. $20 cheaper than BH, and ships 10 minutes after you order
     
  7. Waddup you?

    Waddup you? OT Supporter

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    I just jumped on the gun and got a moose warming polarizer from bhphoto. I was looking at the heliopans and they have a notch system on the ring so you know what level of polarization you are at when turning. I guess Ill start out cheap, and if I like, Ill get a nice one that is coated to the max
     
  8. Wobistdu

    Wobistdu Guest

    How does that work? I just turn until I see what I like :dunno:
     
  9. jackjohnson

    jackjohnson simple as something nobody knows OT Supporter

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    does turning the hoya moose cpl do anything? :o mine spins freely...
     
  10. Wobistdu

    Wobistdu Guest

    it should spin freely, but also have enough resistance to keep it in place

    yeah if the sun is behind your or at a 90 degree from you, you can spin it and see the sky changing.
     
  11. Waddup you?

    Waddup you? OT Supporter

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    from what I've read, the heliopans have marks on the the outer ring so you can see how much "polarization" you are using. I should have said marks, not notches in my previous post. also from my searches, it seems that heliopans are the best in terms of quality. but that's just me being an armchair quarterback. if I like this moose filter I just ordered, I may go on a limb and get a 16 coated heliopan polarizer :noes:
     
  12. jackjohnson

    jackjohnson simple as something nobody knows OT Supporter

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    holy shit.... I thought it did that so you can use a gradual filter with it.

    hmm shit it's hard to see on my lcd... is it a uniform change?
     
  13. Wobistdu

    Wobistdu Guest

    gotta look through the viewfinder

    if you rotate it slowly you'll see. the sky becomes a deeper blue and clouds become defined. as you turn it, it will become shitty again.

    there's probably an exact science way to use them, but i'm a nub and just spin until she looks nice.

    sometimes you can't really tell. shooting in to the sun is usually fail anyway, but off to a 90 or back to sun you can usually see.
     
  14. jackjohnson

    jackjohnson simple as something nobody knows OT Supporter

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    my gf1 doesn't have a viewfinder lol. pointed outside of my office window I can tell though through the lcd

    I was doing comparison shots and was wondering why I was getting such weird results lol.

    i am dumb
     
  15. AbortionSurvivor

    AbortionSurvivor Active Member

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    all CPL's will have this adjustment built in? Or just the better band ones?
     
  16. Wobistdu

    Wobistdu Guest

    lol no worries

    no idea.
     
  17. jackjohnson

    jackjohnson simple as something nobody knows OT Supporter

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    it looks like it's fully polarized when the writing on the ring is centered on top.

    damn this is going to be kind of tricky to get the hang of...
     
  18. Wobistdu

    Wobistdu Guest

    not sure you can go by that. depending on how the sunlight is, i think you need diff angles of polarization to cut it properly.
     
  19. jackjohnson

    jackjohnson simple as something nobody knows OT Supporter

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    I see... is there any place online that explains how this thing works?
     
  20. Wobistdu

    Wobistdu Guest

    just google it. not sure
     

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