Linear vs circular

[ThomasD]

Anyone care to comment the difference between linear and circular polarizer filter? How do you tell the physical difference? Thks.

Rgds
Thomas

 

[ThomasD]

Anyone?

 

[ThomasD]

Thanks guy, i think i found my answer here http://www.geocities.com/cokinfiltersystem/polarizer.htm

I think I will stick to my linear polarizer, works for me..

 

[judeseah]

one thing i believe is AF doesn't work with linear on SLR.

don't know if its mentioned in the link.

jude

 

[yanyewkay]

normally when you look at the rim of the filter it will say CIR-POL or C-POL or CirPol something to that effect. that will indicate a circular polariser.

I've read that linear ones are cheap but will mess up with the AF systems that uses prism/split-beam (in the case of most DSLRs); something like the polarised light cannot get split properly and aligned abck.. i hvae never used linear filters so i cannot vouch if it's true. But I can vouch that Cir Pols AF properly becos I have used it with 1D, 20D, D70.

More like since everyone says so, then I wun waste the money to buy a linear one to prove that it's correct (or wrong).

 

[ThomasD]

any good circular polarizer in the market besides the Nikon which cost a bomb...

 

[TME]

Plenty on the market, cheaper ones from Hoya and Cokin....