Results 1 to 8 of 8

Thread: A new lens cleaning experience

  1. #1

    Join Date
    May 2012
    Location
    Jacksonville Florida
    Posts
    82

    A new lens cleaning experience

    I have not tried this on any "valuable" lenses yet, but....

    I have 2 Minolta MC lenses that have been stored away in a NON climate controlled area in Florida.
    Both lenses have blotches on the front (unprotected) lens surface. Must be fungus I thought.

    I tried using the usual lens cleaning fluid but the blotches remained and appeared to be unaffected.

    What have I got to lose, so I squirted the household clean "Simple Green" directly on the lens at full strength.
    Then wiped the lens with a tissue and low and behold the blotches were removed. The lens shines like new.

    Is this the new miracle cleaner for a lens?

  2. #2
    Moderator
    Join Date
    Jan 2001
    Posts
    7,142

    Re: A new lens cleaning experience

    Per the MSDS, the ingredients of the basic Simple Green product ("All-Purpose Cleaner") are:

    Water 7732-18-5 > 84.8%
    C9-11 Alcohols Ethoxylated 68439-46-3 < 5%
    Sodium Citrate 68-04-2 < 5%
    Sodium Carbonate 497-19-8 < 1%
    Tetrasodium Glutamate Diacetate 51981-21-6 < 1%
    Citric Acid 77-92-9 < 1%
    Methylchloroisothiazolinone 26172-55-4 < 0.002%
    Methylisothiazolinone 2682-20-4 < 0.001%
    Fragrance Proprietary Mixture < 1%
    Liquitint Colorant Proprietary Mixture < 1%

    Perhaps we have some chemists who can comment about putting this on optical glass. At the least, I'd rather not have the fragrance nor the colorant.

  3. #3

    Join Date
    May 2012
    Location
    Jacksonville Florida
    Posts
    82

    Re: A new lens cleaning experience

    It was suggested that the cleaner contains acid that should not be left on the lens. I used regular lens cleaner fluid to hopefully remove any residual "Simple Green" from the lens and it still looks as good as new.

  4. #4

    Join Date
    Nov 1999
    Location
    San Clemente, California
    Posts
    3,334

    Re: A new lens cleaning experience

    Quote Originally Posted by Oren Grad View Post
    ...At the least, I'd rather not have the fragrance nor the colorant.
    At least in normal household use, the fragrance dissipates in a few hours, and it's not strong to begin with. I detect no color or other residue when cleaning white ceramic tile with this product.

  5. #5
    Drew Wiley
    Join Date
    Sep 2008
    Location
    SF Bay area, CA
    Posts
    13,266

    Re: A new lens cleaning experience

    Some people enjoy gambling. I can't afford it. Simple Green is one of the least "green" products I can think of. It's a surfactant which in even extremely low concentration kills marine and aquatic life by preventing oxygen from adhering to their gills. In the case of lenses, this same formula which works on one lens might ruin another by affecting its mounting cement and allowing moisture in. Surfactants break the surface tension of droplets and allow moisture to get through extremely small cracks or pores. And certain of the ingredients can actually attack older mounting cements. The alcohol component would ordinarily evaporate very quickly, but the other ingredients prevent it from doing so. I could say more, but I'm not the one rolling the dice.

  6. #6
    Nodda Duma's Avatar
    Join Date
    Nov 2014
    Location
    Brookline, NH
    Posts
    879

    Re: A new lens cleaning experience

    Hydrogen Peroxide as bought at the store also cleans fungus very well.
    Newly made large format dry plates available! Look:
    https://www.etsy.com/shop/Pictoriographica
    .. because my wife is happy when I can cover my photography expenses!

  7. #7

    Join Date
    Nov 2017
    Posts
    246

    Re: A new lens cleaning experience

    Quote Originally Posted by Nodda Duma View Post
    Hydrogen Peroxide as bought at the store also cleans fungus very well.
    Certainly when combined with ammonia.
    Expert in non-working solutions.

  8. #8
    Drew Wiley
    Join Date
    Sep 2008
    Location
    SF Bay area, CA
    Posts
    13,266

    Re: A new lens cleaning experience

    Appropriately posted by "havoc". Are we talking about cleaning lenses or blowing them apart? Well, even if that's not the case, ammonia is known to dissolve shellac, which is the primary sealant of older lenses, as well as being a cosmetic coating on old brass barrels.

Similar Threads

  1. lens cleaning
    By mkp in forum Lenses & Lens Accessories
    Replies: 6
    Last Post: 4-Jan-2015, 16:51
  2. Lens cleaning
    By photonsoup in forum Lenses & Lens Accessories
    Replies: 18
    Last Post: 13-Mar-2013, 15:41
  3. Lens cleaning (Help, please)
    By Capitan Krayola in forum Lenses & Lens Accessories
    Replies: 14
    Last Post: 27-Feb-2010, 16:22
  4. Cleaning old lens
    By Jan_6568 in forum Lenses & Lens Accessories
    Replies: 8
    Last Post: 22-Sep-2006, 19:27
  5. Lens Cleaning
    By dave s. in forum Lenses & Lens Accessories
    Replies: 13
    Last Post: 24-Mar-2002, 21:57

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •