Fungus and reconditioned lenses

Discussion in 'Open Gear Talk' started by nickthetasmaniac, Oct 28, 2014.

  1. nickthetasmaniac

    nickthetasmaniac Veteran

    Jan 20, 2014
    Launceston & Sydney
    Nick Clark
    Hi all,

    I've been looking for a short tele for the M2 and have found a very nice looking 'fat' 90/f2.8 Tele-Elmarit. The seller has receipts for a recent $400 refurb, but the documentation mentions that the lens was cleaned of fungus.

    It looks mint so I'm just wondering if people have had issues with older lenses and fungus after being recoed?

    Cheers, Nick
  2. pdh

    pdh Legend

    Jan 2, 2011
    It's impossible to remove fungal spores short of operating in a clean room.
    Storage is what promotes fungal growth . Dark damp and warm being optimal.
    However a few fungal threads on a lens won't have the smallest visual impact on images and nor are lenses with visible fungus "infectious"
    Extremely heavy infestation - I mean almost opaque - will decrease contrast and increase veiling flare.
    A heavily infested lens that has been cleaned may still retain marks as the fungus' secretions can etch the glass
    The absurd obsession with lens cleanliness and lenses that are unmarked in the smallest way means there are bargains to be had ...
    • Like Like x 1
  3. Lightmancer

    Lightmancer Super Moderator Subscribing Member

    Aug 13, 2011
    Sunny Frimley
    Bill Palmer
    What he said.

    Sunlight is your friend.

    People's tolerance to fungus is entirely subjective. If you are using old glass, it is almost unavoidable.

    Personally I would reject anything too hazy or fungussy, but then I believe mushrooms should only be served in garlic, or on top of a pizza anyway.