Re: Cokin Filters

My experience has been that the P series graduated grey (I have the P120 & P121S) produce a magenta colour cast.
My understanding is that is why Cokin call them 'graduated grey' not 'neutral density' filters. It is not their quirky nature, it is a fact the filters are not neutral in colour.
This is not the same for their X or Z series filters which are made of C39 organic glass, not the resin used in the A & P series.
Since my discovery that my skies had a magenta glow when I used these filters, I have found out it is a common problem associated with them, people live with it and postwork it out. However there are alternative makes about that fit in the Cokin holder and are neutral so shopping around is a good idea.
IMHO you get what you pay for with filters. Cokin's X & Z series are good, so are many of the other makes out there who produce true ND filters. I have learned putting a bit of plastic in front of even my humble camera does not give the same result as getting the right tool for the job.

Message edited on: 09/13/2005 00:02

And every one said, 'If we only live,
We too will go to sea in a Sieve,---
To the hills of the Chankly Bore!'
Far and few, far and few, Are the lands where the Jumblies live;
Their heads are green, and their hands are blue, And they went to sea in a Sieve.

Edward Lear
http://www.nonsenselit.org/Lear/ns/jumblies.html