Quark deteration or other issue?

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AstrOdyssey
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Quark deteration or other issue?

Post by AstrOdyssey »

Hi All, I purchased this Quark filter in 2021 and have used it very few times each year. It has always been kept in the original screw box with desiccant. The most recent use was the year of 2022, with a 150mm aperture refractor and a 145mm front ERF. I started shooting again last week. When I was storing it, I found that there were traces on the filter as shown in the picture. I tried to wipe it off with lens cleaning paper, but it didn’t feel like traces on the surface. Does anyone know what caused this and whether it would affect Imaging?thank you.
Quark trace pattern on filter
Quark trace pattern on filter
Quark Filter Issue.png (313.31 KiB) Viewed 517 times


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Stephen
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marktownley
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Re: Quark deteration or other issue?

Post by marktownley »

Doesn't look good to me...


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Bob Yoesle
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Re: Quark deteration or other issue?

Post by Bob Yoesle »

It's a deteriorated soft-coated filter, or a space has developed in the sealant between filters. Requires a return for repair/replacement.


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Re: Quark deteration or other issue?

Post by AstrOdyssey »

Bob Yoesle wrote: Tue May 21, 2024 11:06 pm It's a deteriorated soft-coated filter, or a space has developed in the sealant between filters. Requires a return for repair/replacement.
Thank you Bob! will do.


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