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Thread: 159mm Wollensak in Toyo Recessed Lensboard

  1. #1

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    159mm Wollensak in Toyo Recessed Lensboard

    Before I spend the money on mounting this lens for my 8x10 Toyo, does anyone know if the Toyo recessed lensboard will cause vignetting with the 159mm F9.5 Wollensak Series III WA?
    Michael W. Graves
    Michael's Pub

    If it ain't broke....don't fix it!

  2. #2
    Moderator Ralph Barker's Avatar
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    159mm Wollensak in Toyo Recessed Lensboard

    I don't know about the geometry of the 159 Wolly, but board measurements might help. The recessed 159mm Toyo board I have has a total depth of about 40mm, with 25mm square to the inside flat surface, then an angled section out to the front surface. The inside flat surface measures about 115mm square.

  3. #3

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    159mm Wollensak in Toyo Recessed Lensboard

    I mounted a Protar V in a recessed lensboard without any vignetting, but it is a slightly longer lens; about 190mm I believe.

  4. #4

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    159mm Wollensak in Toyo Recessed Lensboard

    The Wollensak 159 intercepts an angle of 100 degrees wide open. You can use this with the measurement of the depth of the board to determine if vignetting will occur. I suspect that it is very close.

    My preference is a flat lens board with this lens and then I know I will not have a problem.

  5. #5

    Join Date
    Dec 2004
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    159mm Wollensak in Toyo Recessed Lensboard

    A flat lens board is ideal, if it is possible. The reason I ended up putting my lens in a recessed board is that without it bellows compression and vignetting by the bellows was a problem. The recessed board, by effectively moving the lens back into the bellows about 50mm solves the problem on my camera.

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