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  1. #1
    Reinhold's Avatar
    Join Date
    Aug 2003
    Location
    Washougal, Washington
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    Multi Format
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    14

    8x20 Paper Negs to test a lens.

    I needed a quick way to take a few photos to illustrate the performance of my new 790mm f:5.4 Wollaston lenses.
    The only way I could do it quickly was to lash the lens onto my 8x20 Canham and make some paper negatives.

    I preflashed some PhotoWarehouse VC RC paper and develope the negative in some old, used Ansco 130, diluted 1+15.
    One negative developed nicely in 7.5 minutes, the other in 14 minutes.
    Since the lens has no shutter, exposure is guesswork.
    But paper is developed under safelight so it's easy to evaluate density despite the uncertain exposures.

    These are scans aof the negatives, I'm super pleased about the results...
    More details are here...
    http://www.largeformatphotography.in...-Meniscus-Lens

    Reinhold
    www.re-invetedPhotoEquip.com
    Attached Thumbnails Attached Thumbnails 790 f22 Gzbo @72dpi.jpg   790 f6.7 gzbo @72dpi.jpg  

  2. #2
    JohnRichard's Avatar
    Join Date
    Apr 2008
    Location
    Lexington, KY
    Shooter
    4x5 Format
    Posts
    262
    Images
    15
    Beautiful!
    - J. Richard
    4x5 Speed Graphic, Looking for another 8x10.



 

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