Quark deteration or other issue?

AstrOdyssey · Post by **AstrOdyssey** » Mon May 20, 2024 3:14 pm

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 Filter Issue.png (313.31 KiB) Viewed 1338 times

Post by **marktownley** » Mon May 20, 2024 7:33 pm

Doesn't look good to me...

Bob Yoesle · Post by **Bob Yoesle** » 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.

AstrOdyssey · Post by **AstrOdyssey** » Wed May 22, 2024 8:00 am

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.

Quark deteration or other issue?

Quark deteration or other issue?

Re: Quark deteration or other issue?

Re: Quark deteration or other issue?

Re: Quark deteration or other issue?