ND fillters

[Paul Manley]

Hi
I have just started to use Graduated ND filters and I have notice that they are not neutral, there give a cross colour which is distinctively pink. If I set my white balance to compensate for this the lower Half go,s green.
Can anyone tell me what is going on here or is this the payoff of using ND filters?

Regards
Paul

[markgozz]

Hi Paul

Usually you only get a colour cast with the more budget end of the filter market but you can also get it when you stack more than one filter infront of another , if you can tell us what make of filter you're using and how you're using them we may be able to help a bit more .

The other way of dealing with colour cast is in PP rather than adjusting your white balance , most image editing programs should have some kind of correction option .

Mark

[Paul Manley]

yes you are right, the filters that i have used are the cheaper ones and i have stacked more then one in front of the other.

you should also know that when I used the more expensive filters I got the same result.

I have a expensive ND 1000 (Hitech 85) that i have used once or twice and again i get this pink coloring.

The Main reason I use them is for Landscapes and Seascapes during the day when I want that misty look on the sea and rivers ect

and if i want detail in the Sky then I go over to HDR

Regards

Paul

[markgozz]

I think unless you use the best quality glass filters you always run the risk of colour cast when you stack them but I'm quite surprised you still have a problem with the Hitech if you're using it on it's own .

Mark