Thread: Help cleaning Hoya ProND "residue/stain"

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  1. #1 Help cleaning Hoya ProND "residue/stain" 
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    For some reason, I can't remove this "residue/stain" on my Hoya ProND 64. My other Hoya ProND8 doesn't exhibit any residue/stain.

    Not sure how the filter got this, it's always in filter pouch as I haven't had the chance to use it yet. I tried lens cleaning tissue, liquid and a clean micro-fibre with no luck.



    Any help? Thanks!
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  2. #2  
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    Dude I have the same thing on 3 of mine. I'm afraid to rub any harder.
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  3. #3  
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    Same here. Fine bubbles or something.
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  4. #4  
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    Yep, I need to contact them but keep forgetting. Pretty much have have a set that's useless right now.
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  5. #5  
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    I've been rubbing it quite hard but no change. I just tried Windex :S No effect...

    What the heck is going on? Is it a defect??

    I don't think it's bubbles as it's like a residue. Could it be the 'coating' fading off? I haven't even used it, it's new and I don't remember seeing it when I got my order.
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  6. #6  
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    Ok, I stand corrected. Only one of these is like this....the 64 as well. I was thinking of others. Anyways I wonder who else's 64 is like this? gl91, is your 64 the same?

    64ND.jpg
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  7. #7  
    Senior Member CaptainHook's Avatar
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    My 32 eventually went like that. I actually ended up throwing it away. The rest of mine including the 64 is fine but using the Firecrests now anyway which don't have the coating on the outside like Hoyas/TrueNDs.
    Blackmagic Design
    My BMD LUTs.

    **Any post by me prior to Aug 2014 was before i started working for Blackmagic**
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  8. #8  
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    Quote Originally Posted by CaptainHook View Post
    My 32 eventually went like that. I actually ended up throwing it away. The rest of mine including the 64 is fine but using the Firecrests now anyway which don't have the coating on the outside like Hoyas/TrueNDs.
    Well that's not good. I had a bad feeling when this started creeping. So Hook, you were never able to get it off? It does look like it's inside or at least below the surface.
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  9. #9  
    Senior Member CaptainHook's Avatar
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    I didn't try "very hard" and it coincided with moving countries, so as we were throwing quite a bit of stuff away i just cut my losses as i didn't have time/energy to try deal with it.
    Blackmagic Design
    My BMD LUTs.

    **Any post by me prior to Aug 2014 was before i started working for Blackmagic**
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  10. #10  
    Senior Member jambredz's Avatar
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    Well this doesn't look good. Mine are fine but still relatively new. I guess they get like this after a while...which sucks! After paying a decent amount of $$ for them stuff like that shouldn't happen. The OP's own is new though so....?? Is it that the coating has rubbed off? Or is is a residue left on the filter? Also, how does it affect the image?
    Darren Scott
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