Linear or Circular Polarizer for my little Optura? at DVinfo.net

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Old September 7th, 2004, 01:17 PM   #1
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Linear or Circular Polarizer for my little Optura?

Hi. I wanna buy a 37mm polarizer filter, but Im not sure about the circular or polarizer one. The price difference is not the problem. What I want to know is: why pick a linear if you can get the circular? Is there anything that makes the linear better than the circular?

THANK YOU!
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Old September 7th, 2004, 01:57 PM   #2
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Trying searching the forums here, there has been a zillion posts about this already. My opinion is that you do not need the more expensive circular polarizer when shooting DV.
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Old September 8th, 2004, 12:42 AM   #3
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Gustavo,

it's not a question of the quality of the filter. The issue is, that some exposure meters don't work correctly when you use a linear polarizing filter. If the manual of your camera does not state which filter type to use you are better off with a circular one because that will allways work.
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Old September 8th, 2004, 12:49 AM   #4
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A linear filter is just fine. MiniDV cams don't use a beam splitter. What Rainer means is that you should spend almost double because he is unsure. I've used a linear on both my cameras and with no problem.

The worst case scenario is that you return the filter and exchange it for a circular (which won't happen)

FYI An autofocus 35mm SLR requires a circular.
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Old September 11th, 2004, 09:28 AM   #5
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Bryan, you are right of course. I didn't think twice (what you should do when posting something).

<<<-- Originally posted by Bryan Beasleigh : The worst case scenario is that you return the filter and exchange it for a circular (which won't happen) -->>>

You guys (and girls of course) on the other side of the big pond are lucky. Try returning a piece of equipment over here in Germany because you changed your mind.... In two cases out of three the dealer would just shake his head in sorrow. Only if you bought something more expensive he might be tempted to agree to the change.
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Old September 11th, 2004, 09:38 AM   #6
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. . er not 'ere Mate!

Sorry Rainer, if you buy something here in the UK and after asking the sales assistant will it work with X equip and asking them if it doesn't work AND you haven' broken it - HAH! - you get to bring it back with either the option of exchanging it for something that DOES work OR a full refund. Well, that's been my experuience. But to make sure I do ask BEFORE I buy it and get the details of the sales and manager of the shop.

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Old September 11th, 2004, 10:37 AM   #7
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Ah, Graham, then you guys on the other side of the small pond are lucky as well...

Well, I don't say you couldn't find a shop that would do what you say, but it is not that easy. I have found such a shop and I buy all my photographic gear at that shop, even if they are not the cheapest one.

Anyway, you would be astonished how, sometimes, customers (who leave a lot of money in a shop) over here are taken care of if something goes wrong! Most Germans, me too, could tell you horror stories even Stephen King wouldn't dream of.

Enough complaining! Let's make movies instead.
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Old September 11th, 2004, 10:56 AM   #8
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The Horror . . The Horror . . .

"German Shopping - Part II " . . just when you thought it was safe to buy a Matte Box in Germany . .


.. . This IS a movie . .isn't it? . . . Silly me . .

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Old September 12th, 2004, 02:26 AM   #9
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A Chrosziel matte box?

That should be pretty safe. They have a very good reputation. The prices are silly, though.
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Old September 12th, 2004, 04:55 AM   #10
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There are (allmost) no reasons why you would need a circular polar for video. What you need for best performance is a filter with good scratchfree multicoating on it, and quite often this is only available as a circular polar.
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Old September 12th, 2004, 07:04 AM   #11
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Andre,

I didn't know that linear polarizing filters don't come with a good multicoating. Is that one of the reasons why they are so much cheaper (ah, less expensive, really) than the circular ones?
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Old September 12th, 2004, 08:27 AM   #12
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Good coating is one element, the extra (internal) retarder layer is the other point.
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Old September 13th, 2004, 03:36 AM   #13
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Thanks for the clarification, Andre.
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Old November 14th, 2004, 05:53 PM   #14
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Looks like Ritz Camera is clearing out some old filters (mostly Cokin) and I picked up a ND, polarizer, and diffuser for $1.25/each. They may have more at your local Ritz/Wolf and online I'm sure they have 46mm.
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Old November 19th, 2004, 06:20 AM   #15
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I think Andre raises a good point - that it's worth paying extra for a good multi-coated polarisor (and BTW, you don't need a circular) simply because the filter becomes the front element of your lens and as such, and in this position of great responsibility, should be beautifully coated. Also be aware that polarisors should be neutral, and the more expensive they are the more neutral thay should be. A cheepie I had once was deep purple.

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