Color shift with Cokin Graduated Grey?

I understand that Cokin P graduated grey filters are not ND. I was wondering if anyone has comments/observations concerning color shift when using them?

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I imagine that it very much depends on the type of film used, so if anyone has experience with: Velvia, Sensia, Royal Gold 25, Super G 400, those are of particular interest.

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Another question: Anyone used "Hitech" resin filters? B&H has them advertised on their web pages. They are quite expensive, but they have true graduated ND.

 

I returned a Cokin graduated "neutral density" filter 8 or 9 years ago
because it was distinctly reddish, so much so that the upper area and
its' reflection in one image were quite different and the effect was
much too obvious for my taste. Cokin replaced the filter with
another that was less objectionable (but still red) because the
batch was, ahem, "a bit off spec.".

 

I bought a Cokin(?) graduated ND filter and it causes a purplish cast. Believe that this is a result of using a plastic ND filter- have been told that glass does not cause this.

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Jeff

 

Glad to see your question. I have not used the Hitech filters. But I have used the Singh Ray and they are neutral density and don't color the image. Most of the filters I have tried are actually colored one way or the other rather than true ND. The Kodak Wratten being an exception but they don't come in graduated densities. I have used Kodak Wrattens in the past by holding them over a sharp line I wanted some ND on and usually had good luck. But the Singh Ray ND with both sharp & soft transition seem better able to handle the problems. They cost a bit but if they work are worth it. Good luck.

 

To all who answered,

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Thanks for your input. I will probably purchase the Cokin P system regardless of the color shift because it is so cheap. If, after a while I can't stand the color shift, I can buy a Singh Ray graduated ND to fit in my Cokin system and the money lost would only be a few bucks...

 

I have not yet met a Cokin ND grad that was actually neutral. The Lee line of ND grads are truly neutral and cost a little more than half of a Singh Ray. Tiffen glass ND grads are also truly neutral, but cost as much as the Singh Ray.

 

I agree with Dan Smith's opinion. The Singh-Ray filters are excellent and come in beautiful leather pouches. I bought the Cokin P filter for one reason only: to hold my Singh-Ray filters!