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01-19-2016, 06:09 PM   #1
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Hoya Pro nd1000 produces 'rings'

I've got no clue where to put this thread so I went for the beginners section..


I recently noticed when shooting long exposures during daytime that my Hoya Pro nd1000 is producing some 'rings'.
Is this 'normal' or is something wrong? I've never noticed it during during dusk or so.

This is at 55mm, f9:


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Cheers!

01-19-2016, 06:14 PM - 1 Like   #2
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Newton's Rings is what it is called.
01-19-2016, 06:59 PM - 1 Like   #3
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QuoteOriginally posted by bertwert Quote
Newton's Rings is what it is called.
Correct, the filter must be touching the front element.
01-19-2016, 07:13 PM   #4
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I feel a bit stupid..
That also explains why I've never noticed it, I had it on that lens (DA L 18-55 WR) the first time!

The more you know.. I'll read up on the matter a bit.
Thanks!

01-19-2016, 09:51 PM   #5
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QuoteOriginally posted by Digitalis Quote
Correct, the filter must be touching the front element.
That makes sense, but presuming this is on the 18-55mm DAL zoom at 55mm, how could it be touching the front element? I've read in other posts reported issues with this filter.

Hoya ProND 1000 purple/green rings - Photo.net Nikon Forum

It seems as if the metallic film used on the glass is not fused entirely and there is enough of a gap that creates the Newton's rings. If you still can, I'd return the filter...it's defective.

Also read this one star review from a month ago that complained of the problem:

http://www.bhphotovideo.com/c/product/1012386-REG/hoya_xpd_77nd1000_77mm_pro_nd_1000x.html
01-19-2016, 10:44 PM   #6
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QuoteOriginally posted by Alex645 Quote
t seems as if the metallic film used on the glass is not fused entirely and there is enough of a gap that creates the Newton's rings.
There was a similar post ages ago where there was a similar problem with newton rings and a UV filter with the DA 18-55. But in this case film separation can also be a cause, a similar thing can occur with de-laminated Polarisers. The Lee ND10 filters I work with are tinted glass, they don't use a film coating so there is no problem with separation.They Hoya filter seems to take the cheaper approach, disappointing.
01-20-2016, 04:14 PM   #7
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In that case it must be touching, it doesn't do it when lightly screwed on or mounted on different lenses.
My UV filters from other cameras I got lately also touch..

I'm just wondering why that would happen on an 'original' lens?!
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