173 Blue/Yellow Polarizer
A favorite of everyone who has used it.
One of the few Cokin filters that is made out of glass.
If you find you like the look of the Cokin Blue-yellow, but you want professional quality sharpness the answer is Singh-Ray's Gold-n-Blue polarizer. Cokin's version works well on lenses in the 20mm to 85mm range, but with longer lenses you definitely start to see a loss in image sharpness. With the Singh-Ray filter there is no sharpness loss with any lens used. However, there is a price for quality, as the Singh-Ray version is about 3 to 5 times as expensive as the Cokin version.
Glenn Fulton
Taken in Glacier National Park, Montana, USA. Combination of filter #164 (Circular Polarizer) and #173 (Blue/yellow Vari-color) was used for these two images.
Pyramid-Lake: This is about a 30 second image at f22 at dawn. It has a 1 stop neutral density filter and the "best Cokin filter"- the P173 Pola Blue-Yellow
