Why is there an "X" showing up in my photos when using variable ND filter?

1 year 6 months ago #689697 by Travis Brunson
I just bought a variable ND filter and in some of my photos you can see a "X".  What is going on here?  It's only happening when using this filter. 


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1 year 6 months ago #689698 by Nikon Shooter

Travis Brunson wrote: It's only happening when using this filter. 


No Travis, it's only happening when using this filter
in given conditions. See…


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1 year 6 months ago #689730 by garyrhook
Not every ND filter has this problem (my Hoya doesn't) so you might try a different product. Or just get one or two fixed value, screw-on HD filters of good quality.


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1 year 6 months ago #689743 by Nikon Shooter
Since iron nails are what they are, they will all rust, no matter
the brand. Nails are not all the same though. Some are stain-
less steel, galvanised, etc, composition dependent not brand.

Variable ND filters are all made in the same way: opposing po-
larisers in a rotating mount, brilliant! That comes, though, with
a cost: when the 2 polarisers are "crossing", the X will appear.
This is not brand relative but physics.

Adding fixed ND filters is the way to avoid the X since it is po-
larising dependent.

Varios are great tools, I used them in studio a lot but they have
that X thing that made me invest in a fixed set as well.

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