what would you do with this lens?

Discussion in 'Large Format Cameras and Accessories' started by chris77, Dec 14, 2017.

  1. chris77

    chris77 Subscriber
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    hello, good evening.
    bought this lens on ebay. surfaces where ugly at first, but cleaned up to perfection with moist breath and microfibre. flawless glass.
    but the interior lens (front group) has this edge situation. it doesnt look like fungus to me, and it is only at the edge,
    other then that a perfect 240 g-claron, not a single scratch..

    would u use it as is, surveillance only.
    or would u open it anyway (no dust at all inside, guess it has never been opened until now) ?
    it certainly doesnt affect image quality, just looking for a second opinion.

    thanks

    IMG_20171214_223523_1513287441824.jpg IMG_20171214_223338_1513287570742.jpg
     
  2. chip j

    chip j Member
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    Use it normally.
     
  3. jnanian

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    id use it as it, and if it doesn't render an image to your satisfaction,
    maybe then open it up, and take a cellphone snapshot of each thing you
    remove ( so youcan put it back together and have it work ) and .. soak the
    glass in a solution of peroxide and water ( look up posts by jim galli either here or
    on largeformatphoto to see the exact concentration ) and then dry them carefully
    and re-assemble the glass might clean up really nice-nice..
    but i'd use it before doing anything .. it might not be anything to worry a bout
     
  4. OP
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    chris77

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    thank. i was thinking the same. meanwhile i have quite some experience opening lenses and cleaning them. but then, when a lens is still factory assembled and so nice with only a little imperfection i prefer to leave it be.
    as in surgery, opening the (lens)body always involves risk.
    cheers.
    chris
     
  5. shutterfinger

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    Edge delamination, use as is, fungus looks much different.
     
  6. Old-N-Feeble

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    Closed down one stop (or two stops), as should be done anyway, you'll never know the delamination is there. However, it depends on the item description regarding whether or not you should return it. Was the seller honest?
     
  7. OP
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    chris77

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    the seller was honest, yes. its a beautiful lens. sharp
    thanks!
     
  8. EdSawyer

    EdSawyer Member
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    as long as stopping down a couple stops, that part of the glass won't be in the image-making path. It's definitely separation. Could be cured, but may not be worth it. 240 g-claron is sharp even wide open, and even better @ f/16.
     
  9. nusproizvodjac

    nusproizvodjac Member
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    I have a similar situation, well not similar, a lot worse, on my Flexaret rear lens elemet. The separation has spread to about 1/3rd of the lens, but l haven't noticed any loss of contrast or sharpness, it just became flare-prone (l posted some photos l took with it). In your case it is really insignificant, so just use it as is.
     
  10. E. von Hoegh

    E. von Hoegh Member
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    Use it with an efficient shade, stopped down one stop, you'll likely never know the issue exists from the results.
    I used to use a Leitz Summitar with awful looking separation in the front cemented pair, as long as I used the SOOPD barndoor shade it didn't do much harm.
     
  11. DC Lohenstein

    DC Lohenstein Member

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    Hello,

    yesterday I used this lens in our local botanical garden (orchids) where it is wet and warm, where you got moisture and mildew. I wouldn't take my beloved Fujinon A 9/180 with its Copal shutter in there.

    Edge delamination will not be your problem when stopping down.

    Its perfect to get some 1:2 to 1:1 macro shots. It has the perfect stay-away distance to the plants. You get exposure times of 2-3 min when using films with low ISO, e.g. Rollei Ortho 25.
     
  12. OP
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    chris77

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    which film format are you shooting it with?
     
  13. Rick A

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    What would I do with it................ set it on a fence post and hurl a 240 grain .455 diameter pill at it at about 840 fps. I love target shooting almost as much as shooting camera gear, this would be combining the two.
     
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    chris77

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    no no, better find your own toys to play with!
    i know what your dog looks like..
     
  15. E. von Hoegh

    E. von Hoegh Member
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    Which model Webley do you have?
     
  16. Rick A

    Rick A Subscriber
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    Colt mark IV, series 70, Gov't model with mods. I used to have a Gold Cup, didn't like the sights.
     
  17. Rick A

    Rick A Subscriber
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    That dog'll eat yer leg off from the ankle down before you could get a shot off.......
     
  18. E. von Hoegh

    E. von Hoegh Member
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    Ah. In which case the nominal bullet diameter is .451.
    My old black powder single action Ruger slugs .458 and shoots best with soft bullets sized to .459. Revolvers are strange, black powder more so.

    When you said .455 I thought you might be shooting a British Webley.
     
  19. Rick A

    Rick A Subscriber
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    My old business partner had a .455 Webley, among other oddities. He was a former SAS from Liverpool. And you are correct on bullet diameter, my fingers work separately from my aging brain.
     
  20. DC Lohenstein

    DC Lohenstein Member

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    6x7, 6x9, 4x5.

    With 4x5, you need a bellows extensxion of 36 cm to get magnifition 1:2, and 48 cm to get 1:1.

    I normally had a bellows extension of 38-42 cm on "The Brand 17".

    Aperture normally was f 22 - f32, with exposure times from 2 min - 7 min, on Rollei Ortho 25@16 with a dark yellow filter to keep the green tones slightly darker than normal (orthochromatic film lightens up green).

    Exposure was determined by lens cap.
     
  21. E. von Hoegh

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    It doesn't help that caliber nomenclature and actual groove diameter don't always match i.e. 38 caliber is actually .357".
     
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