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Thread: Largest, fastest wide angle lens for ULF?

  1. #11
    Mark Sawyer's Avatar
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    Re: Largest, fastest wide angle lens for ULF?

    Same as this?

    https://www.ebay.com/itm/WWII-Milita...8AAOSwhTBa08il

    If it's a "wide-angle window", it's a negative lens and won't form an image.
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

  2. #12

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    Re: Largest, fastest wide angle lens for ULF?

    The very one. For more details, see the link in post #10 above.

  3. #13
    Tin Can's Avatar
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    Re: Largest, fastest wide angle lens for ULF?

    Quote Originally Posted by Mark Sawyer View Post
    Same as this?

    https://www.ebay.com/itm/WWII-Milita...8AAOSwhTBa08il

    If it's a "wide-angle window", it's a negative lens and won't form an image.
    That's exactly like what I held in my hands.

    Jac may have something different.
    Tin Can

  4. #14

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    Re: Largest, fastest wide angle lens for ULF?

    Quote Originally Posted by Randy Moe View Post
    That's exactly like what I held in my hands.

    Jac may have something different.
    Take a look at the discussion the link on post #10 above points to.

  5. #15
    Tin Can's Avatar
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    Re: Largest, fastest wide angle lens for ULF?

    Quote Originally Posted by Dan Fromm View Post
    Take a look at the discussion the link on post #10 above points to.
    I have thrice

    Let Jac speak for himself.
    Tin Can

  6. #16

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    Re: Largest, fastest wide angle lens for ULF?

    Thrice? Wow! Its been a while since I've seen the word.

  7. #17
    Tin Can's Avatar
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    Re: Largest, fastest wide angle lens for ULF?

    Quote Originally Posted by Dan Fromm View Post
    Thrice? Wow! Its been a while since I've seen the word.
    As a child, I read the dictionary, but I am still a bad speeler and typist.
    Tin Can

  8. #18
    Jac@stafford.net's Avatar
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    Re: Largest, fastest wide angle lens for ULF?

    I am temporarily handicapped: I hope it is temporary (it is a periodic thing) so showing the window's image must wait until I have some help. I now have two of them, and for fun I'm speculating if I place them back-to-back they might make an interesting symmetric lens.

    The inventor of this also patented a proper and huge lens based, in part, on my lens/window.

    Dan: Thrice is a real word to us old (over 70 YO) proper English speakers. I know of no such in Canuck, my only vaguely familiar family language.

  9. #19
    Mark Sawyer's Avatar
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    Re: Largest, fastest wide angle lens for ULF?

    Quote Originally Posted by Jac@stafford.net View Post
    ...I now have two of them, and for fun I'm speculating if I place them back-to-back they might make an interesting symmetric lens.
    As these are negative lenses, and since two negative lenses don't make a positive, I'm afraid not. Perhaps if you could separate positive elements it could be done, but I suspect these are single-element negative menisci.
    "I love my Verito lens, but I always have to sharpen everything in Photoshop..."

  10. #20
    Jac@stafford.net's Avatar
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    Re: Largest, fastest wide angle lens for ULF?

    Quote Originally Posted by Mark Sawyer View Post
    As these are negative lenses, and since two negative lenses don't make a positive, I'm afraid not. Perhaps if you could separate positive elements it could be done, but I suspect these are single-element negative menisci.
    I will disassemble the used one.
    Here are some pics.
    http://www.digoliardi.net/b-25/windoiw-pics/c.jpg
    http://www.digoliardi.net/b-25/windoiw-pics/b.jpg
    http://www.digoliardi.net/b-25/windoiw-pics/a.jpg

    http://www.digoliardi.net/b-25/windo...stration-1.jpg

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