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Thread: Lens coating removal question

  1. #11
    Scyg's Avatar
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    Re: Lens coating removal question

    I would not use rouge. Coatings are actually harder than the glass they're on, so if you have any imperfections in the coverage, you'll be digging pits into the exposed glass of the lens while trying to rub off the coating. Voice of experience here.

  2. #12

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    Re: Lens coating removal question

    Ok, thank you!

  3. #13

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    Re: Lens coating removal question

    Also, Steichen in the early days used to rub spit on the lens for his pictorial look... :-0

    Steve K

  4. #14

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    Re: Lens coating removal question

    Quote Originally Posted by LabRat View Post
    Also, Steichen in the early days used to rub spit on the lens for his pictorial look... :-0

    Steve K
    His or someone else's? LOL.
    I doubt my spit would take Wocote off.

  5. #15

    Re: Lens coating removal question

    Xerapol acrylic scratch polish is very fine and works very well on perspex etc. Toothpaste is also a very fine abrasive.

  6. #16

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    Re: Lens coating removal question

    An optical engineer posts on this forum as Nodda Duma. Why don't you ask an expert?

  7. #17

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    Re: Lens coating removal question

    Ok, I tried Isopropyl alcohol, I tried undiluted Stop Bath. I tried toothpaste. No change.
    I looked at the front element with an 8x loupe, and the element is badly micro-pitted....toast!
    The good news is that I had no expectations going into this experiment...so I can play around with front element spacing, etc. to give it a Fuzzulator with impunity.
    Thanks for the ideas & advice, folks!

  8. #18

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    Re: Lens coating removal question

    I once fixed a chipped condenser in a slide projector by filling the chip with superglue to eliminate the shadow it cast on the edge of the frame once it was filled and slightly polished it down...

    I call superglue "liquid plexiglass" as it dries perfectly clear if applied correctly... Sure, it does not have the same refractive index of the glass, but it fills the voids...

    The trick is to apply a drop and let it dry at least overnight in a dust - free place, then you will notice it will shrink and thin out, so repeat... Allow a couple of days to dry and repeat, and repeat until it has filled the pits... Then carefully remove excess and polish like plastic...

    For your project for fun, this will at least increase the contrast... What do you have to lose???

    Steve K

  9. #19

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    Dec 2018
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    Re: Lens coating removal question

    Hmmm. Sounds like it might be worth a try, I have some of the thin stuff.

  10. #20

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    Dec 2018
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    Re: Lens coating removal question

    I tried the superglue trick, and it helped a bit! Most of the cloudiness went away! Thanks, LabRat!

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