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November 23rd, 2003, 01:23 AM
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#1 |
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Regular Crew
Join Date: Nov 2003
Posts: 51
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4x4" Filters for Picture Quality Improvement
What are the best 4x4" glass filters for overall picture imrovement?
Thanks, C. Cook
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November 23rd, 2003, 12:33 PM
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#2 |
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Wrangler
Join Date: Jan 2002
Location: Los Angeles, CA
Posts: 6,810
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Corey, you indeed Have Spoken...Vaguely!
What kind of overall picture improvement are you looking for? Better contrast, latitude, color, more film-like? It depends on the shooting situation. Best to start off with a Polarizer for exteriors. Searching the archives here under "filters" may unearth some gems. Good luck!
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Charles Papert www.charlespapert.com |
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November 25th, 2003, 06:31 PM
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#3 |
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Regular Crew
Join Date: Nov 2003
Posts: 51
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I've looked at circular polarizers.
What do they mean by 'circular?' Is the filter NOT a 4x4" square glass, but a circular filter? Thanks, C. Cook
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November 25th, 2003, 07:21 PM
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#4 |
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Wrangler
Join Date: Jan 2002
Location: Los Angeles, CA
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Corey,
Much discussion has occurred here over circular vs linear polarizers. Try doing a search. I'm personally of the school that circular polarizers are not necessary for DV.
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Charles Papert www.charlespapert.com |
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November 25th, 2003, 08:10 PM
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#5 |
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Retired DV Info Net Almunus
Join Date: Dec 2001
Location: Chicago, IL
Posts: 6,943
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Corey,
I think you are confused by the term "circular" with respect to a polarizer. It has no relation to the physical shape of the filter. It refers to the manner in which light is polarized in the filter. There are circular polarizers and linear polarizers. For what it's worth, I use a linear polarizer in a 4"x 4" matte box and it works just fine with both my XL1s and my DVX100.
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December 1st, 2003, 08:16 PM
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#6 |
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Major Player
Join Date: Aug 2003
Location: Poplarville, MS
Posts: 453
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Corey,
You would want to use a circular polarizer to reduce glare from water, windshields, fish tanks, etc. These work by filtering the reflected light, which comes in at a different angle than light that isn't reflected. (Very simplistic terms there, but this is how I understand it.) Also, as with a regular polarizer, they are used to get that blue saturated sky look. The main difference is that circular polarizers can be turned to adjust the glare filtering. ,Frank |
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December 2nd, 2003, 10:17 AM
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#7 |
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Wrangler
Join Date: Jan 2002
Location: Los Angeles, CA
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I'm afraid I can't agree with Frank on this. Linear polarizers are designed to be turned to increase or decrease glare of reflected light. Despite the name, both are made in square and round shapes. Information and definition of the two types and what they are used for can be found at the various filter manufacturer's sites such as Tiffen and Schneider.
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Charles Papert www.charlespapert.com |
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December 2nd, 2003, 10:52 AM
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#8 |
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Major Player
Join Date: Aug 2003
Location: Poplarville, MS
Posts: 453
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Charles: Thanks for that clarification. I always took it that
circular polarizers were simply adjustable, as opposed to linear polarizers. I found this explanation on one page: "A circular polarizer is a linear polarizer with a 1/4 wave plate attached at a 45° angle" Thanks! ,Frank |
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