0.7x Wide Lens - spot inside the lens

Discussion in 'Professional Video Production' started by Harry Kiri, Oct 18, 2004.

  1. Harry Kiri

    Harry Kiri Guest

    We have a Sony VCL-0758 wide adaptor, which has a tiny spot inside the
    lens. It's only visible in daylight conditions, presumably because the
    narrow aperture brings the spot into focus. The spot appears to be
    behind the very first (frontmost) glass element.

    Are there any quick or easy solutions that can be tried before sending
    the lens back to Sony for repair?

    Harry Kiri, Oct 18, 2004
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  2. That sounds like fungus. The lens of my TRV900 starts getting full
    with them. Dreaded Sydney climate :( Take it apart, or put some
    anti-biotic in between the elements (just kidding on the latter,
    bacteria can be very tough).


    Martin Heffels, Oct 18, 2004
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  3. Harry Kiri

    Harry Kiri Guest

    Sydney climate? Fungus? Don't you need water for that? :) <bad taste
    repartee for Syneysiders, whose dams are now approaching empty in the

    Up north, in the Hunter Valley, our TRV-900 must have lived a charmed
    life. Neither it nor an 0752 wide has been hit by fungus so far (touch
    wood). How do you fix your TRV-900 fungus growths?

    The anti-biotic sounded too much like chemical warfare. I'm more into
    radiation weaponry, so I thought the microwave might be the better
    option :)

    Seriously, can you take a VCL-0758 apart to clean it?? Twisting the
    front section doesn't seem to be productive. Have you taken one apart?

    Hunter Valley, NSW
    Harry Kiri, Oct 18, 2004
  4. LOL. It's the damp sea-climate (for the geographically challenged ;-)
    I am contemplating on taking the thing apart. It must be possible to
    take a lens apart, although it will be a hell of a job. But I better
    wait untill Sony actually releases the HVR-Z1, so I can replace it
    with something better, if the "operation" fails.
    Nw, that's one I thought of too :)
    No. I have a Canon WA-adapter. But I assume the lens-elements are
    glued into the shell/case/housing or whatever it's called. So in that
    case you would need an agent to dissolve the glue, and later use the
    right type of glue to glue the lens back. Hmmm, I mmight have a chat
    with a guy who worked for Panavision for many years, see what he says.


    Martin Heffels, Oct 18, 2004
  5. Harry Kiri

    Harry Kiri Guest

    Now that's scary and I can be as ham fisted as the best of them. I
    think I'll pack it off to Sony, although one wonders whether it'd be
    cheaper to just buy the Canon WA. I recall reading a post or two on the
    Canon 0.7 WA that suggested it was the best of the bunch and about half
    the cost of the Sony.

    Anyway, looking at the spot with a 10x magnifier, it's an amber colour
    and it's translucent. It's not evenly coloured though, it seems to have
    a darker centre. Not sure if that's consistent with fungus. It's hard
    to imagine what else it could be, unless it's a spot of glue that was
    loose and is now stuck to the glass.

    There don't seem to be any others developing. A couple of fairly harsh
    taps against a wooden surface didn't dislodge the spot, so I guess it's
    more than just electrostatic attraction that's holding it on the glass.

    Hunter Valley, NSW.
    Harry Kiri, Oct 18, 2004
  6. Harry Kiri

    kay & wand Guest

    where in the hunter are you?

    leslie (blandford)
    kay & wand, Oct 19, 2004
  7. Harry Kiri

    Harry Kiri Guest

    Hi Leslie,

    We're in Ashtonfield.

    Harry Kiri, Oct 19, 2004
  8. Harry Kiri

    ushere Guest


    btw, blandford is the commuter suburb of murrurundi...

    all the best


    more about me here - http://users.bigpond.com/kaywand
    ushere, Oct 19, 2004
  9. Harry Kiri

    Harry Kiri Guest


    Will email you.

    Harry Kiri, Oct 20, 2004
  10. Harry Kiri

    none Guest

    Find a local camera repair shop in your area and have it break the
    lens down and clean it.
    none, Oct 20, 2004
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