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Old Aug 1, 2005, 3:00 PM   #1
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Im wonderingwich type of polarizer that I have to put on my DX6490 !!!!

Do I have to put linear or circular Polarizer ???

Thank you







P.S.

SCuse me for my english. . . Im not very good

I speak french
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Old Aug 1, 2005, 3:45 PM   #2
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you can put either one on it but I'd suggest spending a little extra money
and get the Circular Polarizer
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Old Aug 1, 2005, 7:34 PM   #3
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Get a circular polarizer,,,the linear is not designed to work with auto focus cameras,,IT CAN AFFECT THE METERING,,,AND FOCUSING....



Here`s a link to read,,,,scroll down to "how to select the correct polarizing filter"

http://www.camerafilters.com/pages/cpl.aspx

I`ve checked with a ton of information sites on this,,and all say to only use the linear with a manual focus camera...

Brian

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Old Aug 1, 2005, 8:29 PM   #4
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Either will work the same on your camera. Circular polarizers are required only for cameras that use a split beam from semi-silvered mirrors for focusing, and that is pretty much limited to DSLR and SLR type cameras. I don't know of a non-DSLR digital camera that uses split beam focusing. If you use a linear polarizer on a camera with a semi-silvered mirror it can also screw up the metering.

There is a second layer called a quarter wave plate in a circular polarizer that re-scrambles the light so a split beam system can focus properly. It is totally unnecessary in a non-DSLR camera. You are just paying for something you don't need. And have an extra layer you don't need.

All other things like quality and coatings being equal, a linear polarizer will give you the same effect as a circular polarizer without the expense and useless extra layer.

This is from PhotoReview:
" Two types of polariser are available: linear and circular. Linear polarisers will work with almost all types of cameras (digital and film) and are usually cheaper than circular polarisers. However, circular polarisers will do a better job with cameras that use split-beam optics for focusing and metering, such as digital SLRs" http://www.photoreview.com.au/Articl...cd/Default.htm

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Old Aug 1, 2005, 8:43 PM   #5
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well I have the DX6490 and I have a circular Polarizer
and it works great

you can turn the Polarizion to take away the most glare
or give you the best contrast of a shot in bright sunlight
or when taking a shot over water to see through it
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Old Aug 2, 2005, 12:26 PM   #6
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JD. You can do the same with a linear. I got the circular on my 6490 but a linear in my Cokin filters. They work about the same>


Dawg

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Old Aug 5, 2005, 1:08 AM   #7
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I have a question about filters? Are all brands that make filters the same or are some brands better than others? ( I guess is it like you get what you pay for)

Thanks Darrell
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Old Aug 5, 2005, 1:15 AM   #8
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You hit the nail on the proverbial head,DITD!!! The better ones cost more because more is put into producing them. Quality assurance and peace of mind are part of the price you pay. I don't plan on entering contest or publishing any of my pics so I can get by with a little less high quality in my pics. Pro's can't afford to. The clarity and quality of their photo's is what allows them to sell them.


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