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STacking ND filters turns my pictures pink!?????
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Hi, I have recently bought a couple of ND filters that I have been using to try capture those seascape shots with a much reduced shutter speed. My problem is that when I stack the filters the pictures come out with a pink hue that I cannot fix in PShop.
Has anyone any idea how to prevent this when using stacked ND filters?
Rob
Thats why expensive filter manfacturers like lee justify their cost. Cheaper filtration usually have unwanted casts, this is especially evident in nd filters which should have
no discernable colour cast – the problem is exacerbated by stacking. You don’t say what filters you’re using, I got ‘hitech’ nd grads from a place in the uk, and found hoya
was good also, these are relatively low cost options. Cokin seem to have a reputation for inaccurate filters but i have little experience of them.Buy Lee’s
I’m presuming you are using Cokin filters? They are known to have this problem as they are plastic grey rather than true ND filters.
You can reduce the effect somewhat by adjusting the white balance of the image afterwards to try and get rid of the purple tint but to be honest this isn;t great.
another thing you an do to minimise the effect is add a photofilter layer in photoshop which is made from the negative colour of the cast, and adjust the density to balance out the cast
Ballyman wrote:
Buy Lee’s
I’m presuming you are using Cokin filters? They are known to have this problem as they are plastic grey rather than true ND filters.
You can reduce the effect somewhat by adjusting the white balance of the image afterwards to try and get rid of the purple tint but to be honest this isn;t great.
Would a Custom White Balance help ???
For landscapes you might get away with one per session.It will help but if it’s a grad then only half your image will be affected so it’s difficult to only change the WB for half the image. If you were using full ND filters then it’s easier as all the image will be affected so you can change the WB for all the image. You will never get it 100% right this way though so in the long run you’d be better off buying a set of Lee’s.
Yep they were Cokin ND8 and ND4 combined Pseries. There were cheaper filters out there , Cokin appeared to be middle range but with disappointing results!. Singularly they are fine but try stack and you are into pink territory.
Will try the WB adjustment prior to spending the mortgage on the Lee filters :D
I had the exact same problem and since have only used them a couple of times and
that was only when I was converting to b+w.RASMITH32 wrote:
Yep they were Cokin ND8 and ND4 combined Pseries. There were cheaper filters out there , Cokin appeared to be middle range but with disappointing results!. Singularly they are fine but try stack and you are into pink territory.
Will try the WB adjustment prior to spending the mortgage on the Lee filters :D
Yeah, we’d all like a set of Lee’s but you can get quite far with the Cokin’s. My rule of thumb is you can only justify a set of Lee filters if you’ve sold some photos to pay for them! If you haven’t sold any prints/rights yet then you’ll probably be fine with Cokins ;-)
Here’s a test / comparison I did to work out the WB correction for a Cokin ND8: http://www.dynaxdigital.com/index.php?topic=10545.0
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