Fungus or something else? (outgassing?)

Discussion in '35mm Cameras' started by Phil, Squid-in-Training, Mar 18, 2005.

  1. I'm not sure if I have fungus in my lenses. I'd left them largely untouched
    in a dry but dark area for roughly 2 years. I've got a 19-35mm cheapo and a
    Canon EF 75-300 that I finally whipped out in prep for an incoming D30 (yes,
    I know, but I have little money).

    I've got similar-looking haze on both the 75-300 and the 19-35, but my 50mm
    f/1.8 only has large specks of dust... it doesn't have the hazy look I see
    in the other two lenses. Could this be the plastics outgassing? My
    windshield looks like this every week. I took a pic of the 75-300 with my
    CP4500 and would like some input as to whether or not I've been fungussed:

    http://plaza.ufl.edu/phillee/fungus1.jpg
    http://plaza.ufl.edu/phillee/fungus2.jpg

    I should note that this is only visible when I hold the lens at an oblique
    angle and it still appears sharp and clear when faced head-on. It's also
    not filament-like at all. The haze is also on different elements, not just
    one. And when I saw some speck-like bits on the front element, they came
    off easily. I'll try getting some blower air in there... once I get a
    blower.

    Note to manufacturers: a final anti-fungus coating on lenses would be
    greatly appreciated, even if it does decrease transmission a bit.
     
    Phil, Squid-in-Training, Mar 18, 2005
    #1
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  2. Phil, Squid-in-Training

    chrlz Guest

    Well, I have waited to see if anyone who specialises in fungal
    infections would bite.. (O;

    I'm afraid my only comment is that what you have pictured there looks
    more like what I would expect if a lens had been sitting out exposed,
    and someone had literally sprayed the hell out of the area with fly
    spray..!!

    The fungus I have seen in lenses did *not* look like that. I've only
    seen it about 5-7 times though (I live in a very dry area!) while
    browsing through second hand equipment. And outgassing from lubricants
    or plastics normally results in a fog or haze, not lots of little
    `droplets`. I find it hard to imagine what would do that, especially
    to internal lens components in a dry/dark stored lens in just a couple
    of years - is it possible there was something damp stored with them?

    Sorry I'm not helping, but I will be interested if you do find out what
    it is.. Weird!
     
    chrlz, Mar 18, 2005
    #2
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  3. Phil, Squid-in-Training

    Chris Brown Guest

    I've seen fungus on '50s camera lenses, and it didn't look anything like
    either of those. YMMV.
     
    Chris Brown, Mar 18, 2005
    #3
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