What should I pay for a polarizing filter?

Discussion in 'Photography' started by Robert Coe, Aug 31, 2012.

  1. No it wouldn't!

    DadioH was right, depending on the refractive index of the material
    being reflected from, it is close to 35deg - actually for most
    conventional glass is it 34deg and for water it is 37deg from the plane
    of the surface.

    Try Googling "Brewster's Angle" instead of making wild guesses and
    claiming they make sense. Or just learn some pretty basic optics!
     
    R. Kennedy McEwen, Sep 3, 2012
    #41
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  2. Robert Coe

    Robert Coe Guest

    You should pay as much as Apple ask you to because
    : a circular piece of glass is just a rectangle with rounded corners!
    :
    : Polarised or not, Apple have it covered. ;-)

    Or to put it another way, I shouldn't feel too bad about shipping almost $300
    to B&H for a couple of filters, because at least Apple won't get a dime of it!
    :^)

    Bob
     
    Robert Coe, Sep 3, 2012
    #42
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  3. Robert Coe

    Me Guest

    Did you deliberately and disingenuously snip context out?

    "I'd probably want to try to keep the scene framed at 90 deg to the sun
    so at least the sides were even"

    I may have been talking cross-purpose to the OP's reply there, but that
    hardly warrants your smart-arsed reply.
     
    Me, Sep 3, 2012
    #43
  4. I didn't snip any context out, your reply to the OP's statement was a
    single sentence followed by an attempt to justify your error.
    Which is irrelevant when you are trying to remove the reflection of the
    sun!
    That may be the case, but don't complain when someone corrects such wild
    contradictions of factual statements by the OP.
     
    R. Kennedy McEwen, Sep 3, 2012
    #44
  5. Robert Coe

    J. Clarke Guest

    I'm not clear on how that constitutions "killing off starving people" in
    any case. Is someone laboring under the misconception that Barclays
    bought all this food and put it in a warehouse somewhere never to be
    seen again?
     
    J. Clarke, Sep 3, 2012
    #45
  6. Robert Coe

    Robert Coe Guest

    : : >Because of aquisitions over the past couple of years, three of my most-used
    : : >lenses are now 77mm diameter. So imagine my irritation last weekend when I
    : : >reached for a 77mm circular polarizer and realized that I don't have one! My
    : : >largest polarizer is 67mm. :^|
    : : >
    : : >So, off to the B&H Web site to find what I need. But it seems that the prices
    : : >of polarizers can now vary by a factor of five or six ($45 to $275, more or
    : : >less). So can you guys help me sort this out? How much does a serious
    : : >photographer have to spend? In the "old days" I'd have bought the $45
    : : >polarizer without a second thought. Should I reconsider that attitude now? Are
    : : >there actually important differences, or is it all marketing hype?
    : :
    : :
    : : I bought my 77mm CPL a few years ago. It cost me a lot of money but
    : : has proved to be a wise investment. The brand is B+W, it is made in
    : : Germany from Schott glass (Carl Zeiss Group), it is multi-coated and
    : : is sealed at the edges. It is therefore completely waterproof. That
    : : matters because you can use wet cleaning methods and the water never
    : : penetrates the polariser matrix between the two sheets of glass. Also,
    : : no problem using it in adverse weather or high humidity.
    : :
    : : The ones with sealed edges are called Kaesemann.
    : : <http://www.bhphotovideo.com/c/produ...45620_77mm_Kaeseman_Circular_Polarizing.html>
    : : or
    : : http://preview.tinyurl.com/9e4l72x
    : :
    : : $144.95 from B&H with free shipping. Fine value IMHO.
    :
    : Yeah, that one caught my eye on the B&H site yesterday. I had about resigned
    : myself to buying a couple of them when I noticed that some ostensibly similar
    : filters were dramatically cheaper and others dramatically more expensive.
    : Which left me nothing but confused. But so far, everyone seems to be giving
    : me the same advice, so the B&W Kaesemann is probably what I'll end up with.

    And now I have indeed bought one. It seems well built and is surprisingly
    heavy. I just got it, so I haven't had a chance to test it yet. But I've
    already made an interesting discovery: Who knew that the light from a
    flat-panel monitor is strongly polarized?!

    Bob
     
    Robert Coe, Sep 10, 2012
    #46
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