Polarizing Filter at DVinfo.net

Eduardo Mayen · February 28th, 2002, 10:03 PM

Im shooting with the XL1 with a Fujinon Lens. I want to saturate the colors as much as possible. Should I go with a circular polarizer or should i save my money and just buy the linear one.

Ken Tanaka · March 1st, 2002, 01:17 AM

I'd recommend a circular polarizer (CP). It's my understanding that CP's have a coating on the lens-side of the filter that prevents the lens' own polarizing coatings from causing color aberrations when used in combination with the filter.

Charles Papert · March 1st, 2002, 05:33 AM

That's news to me. Circular polarizers are designed to avoid issues with camera systems that use beam splitters that polarize the light passing through them, to avoid cross-polarization which can black out the image or fool the internal metering system, both functions of film cameras . Although as I write this, I wonder about the prism that divides the incoming light rays to the 3 chips inside the camera. I've always used a linear polarizer with excellent results with 3 chip cameras though. My preference is the B&W/Schneider True-Pol.

Adrian Douglas · March 2nd, 2002, 06:54 AM

The problem with using a CP on the Fujinon lens is that the front element rotates so you'll have to change the CP position everytime you zoom or focus.

Charles Papert · March 2nd, 2002, 11:34 AM

That's a good point Adrian, and true of the linear polarizer as well. It's an excellent argument for using a mattebox with rods in combination with the manual lens to prevent this from happening. Although I understand the front element of the new 16x manual lens doesn't rotate....?

Digital Dan · March 20th, 2002, 09:29 PM

I use one of those "Moose" polarizers on my GL1 - it combines an 81A with a cir pol. Sort of a warming effect. Really cool. Different. Especially nice for colorful foliage, early and late light.

Andrew Leigh · March 22nd, 2002, 11:06 PM

Hi all

Somewhere I read that linear polarisers confuse AF systems and that for video circular polarisers are a must. Don't ask me where or when I read this but that's what caused me to go the circular route.

It may have been in one of the Canopus forums.

Regards
Andrew

February 28th, 2002, 10:03 PM	#1
Eduardo Mayen Regular Crew Join Date: Feb 2002 Location: LAs Vegas Posts: 32	Polarizing Filter Im shooting with the XL1 with a Fujinon Lens. I want to saturate the colors as much as possible. Should I go with a circular polarizer or should i save my money and just buy the linear one. __________________ Eduardo

March 1st, 2002, 01:17 AM	#2
Ken Tanaka Retired DV Info Net Almunus Join Date: Dec 2001 Location: Chicago, IL Posts: 6,943	I'd recommend a circular polarizer (CP). It's my understanding that CP's have a coating on the lens-side of the filter that prevents the lens' own polarizing coatings from causing color aberrations when used in combination with the filter. __________________ Lady X Films: A lady with a boring wardrobe...and a global mission. Hey, you don't have enough stuff! Buy with confidence from our sponsors. Hand-picked as the best in the business...Really! See some of my work one frame at a time: www.KenTanaka.com

March 1st, 2002, 05:33 AM	#3
Charles Papert Wrangler Join Date: Jan 2002 Location: Los Angeles, CA Posts: 6,810	That's news to me. Circular polarizers are designed to avoid issues with camera systems that use beam splitters that polarize the light passing through them, to avoid cross-polarization which can black out the image or fool the internal metering system, both functions of film cameras . Although as I write this, I wonder about the prism that divides the incoming light rays to the 3 chips inside the camera. I've always used a linear polarizer with excellent results with 3 chip cameras though. My preference is the B&W/Schneider True-Pol. __________________ Charles Papert www.charlespapert.com

March 2nd, 2002, 06:54 AM	#4
Adrian Douglas Trustee Join Date: Oct 2001 Location: Chigasaki, Japan. Posts: 1,660	The problem with using a CP on the Fujinon lens is that the front element rotates so you'll have to change the CP position everytime you zoom or focus. __________________ Adrian DVInfo.net Search for quick answers Where to buy? From the best in the business...DVInfo.net sponsors

March 2nd, 2002, 11:34 AM	#5
Charles Papert Wrangler Join Date: Jan 2002 Location: Los Angeles, CA Posts: 6,810	That's a good point Adrian, and true of the linear polarizer as well. It's an excellent argument for using a mattebox with rods in combination with the manual lens to prevent this from happening. Although I understand the front element of the new 16x manual lens doesn't rotate....? __________________ Charles Papert www.charlespapert.com

March 20th, 2002, 09:29 PM	#6
Digital Dan New Boot Join Date: Mar 2002 Location: St. Petersburg FL Posts: 10	I use one of those "Moose" polarizers on my GL1 - it combines an 81A with a cir pol. Sort of a warming effect. Really cool. Different. Especially nice for colorful foliage, early and late light. __________________ Mike

March 22nd, 2002, 11:06 PM	#7
Andrew Leigh Major Player Join Date: Oct 2001 Location: Johannesburg, South Africa Posts: 220	Hi all Somewhere I read that linear polarisers confuse AF systems and that for video circular polarisers are a must. Don't ask me where or when I read this but that's what caused me to go the circular route. It may have been in one of the Canopus forums. Regards Andrew