Rodagon 60 and 80 WA

Discussion in 'Darkroom Developing and Printing' started by JCJeski, Dec 21, 2003.

  1. JCJeski

    JCJeski Guest

    Hi,

    What size film are these lenses intended to enlarge?

    John
     
    JCJeski, Dec 21, 2003
    #1
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  2. JCJeski

    Bob Salomon Guest

    60mm WA covers 6x7 80mm WA covers 6x9cm.
     
    Bob Salomon, Dec 21, 2003
    #2
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  3. The Rodenstock web site contains the following table:

    Rodagon-WA Maximum
    film size Recommended scale range
    40 mm f/4.0 24×36 mm 4 - 20 ×
    60 mm f/4.0 6×6 cm 4 - 15 ×
    80 mm f/4.0 6×9 cm 4 - 15 ×
    120 mm f/5.6 9×12 cm 4 - 15 ×

    My question for Bob is does the 60wa really do 6x7?
     
    John Stockdale, Dec 23, 2003
    #3
  4. JCJeski

    Mark A Guest

    Nope, not according to the German Rodenstock website you quoted.
     
    Mark A, Dec 23, 2003
    #4
  5. JCJeski

    Bob Salomon Guest

    No it says the Rodagon 60mm WA covers 6x7cm.

    See the following:

    http://www.prograf.ru/rodenstock/enlarging_en.html#Rodagon-WA
     
    Bob Salomon, Dec 23, 2003
    #5
  6. JCJeski

    Mark A Guest

    Mark A, Dec 23, 2003
    #6
  7. JCJeski

    Indheatec Guest

    Subject: Re: Rodagon 60 and 80 WA
    //////////////////////////////////////////////////

    I have the older 60mm Eurogon and it covers 6x7 with no problem at all. As a
    matter of fact at F5.6-11 it's excellent, sharp to the corners and allows me to
    enlarge to 20x24 at the base board with my Saunders 6x7 dichro.
     
    Indheatec, Dec 24, 2003
    #7
  8. JCJeski

    Mark A Guest

    Lens coverage is not totally objective, especially at larger f-stops, since
    coverage increases as the f-stop increases. But the Rodenstock Rodagon-WA
    60mm enlarging lens IS RATED BY THE MANUFACTURER at 6x6, regardless of what
    anecdotal statements people make about the lens.
     
    Mark A, Dec 24, 2003
    #8
  9. I think that's right. Paul Butzi has a scan of the Rodenstock MTF
    graph for this lens at
    http://www.butzi.net/rodenstock/rodagon/60mmwa.htm

    and it is clear that the manufacturer has measured only to the edge of
    the 6x6 frame, where, incidentally, the curves are falling rapidly.
    It might cover 6x7 but not at the sharpness that one would expect for
    a lens of this standard.

    Perhaps Bob has an updated MTF graph for a new model. If so, could we
    see it Bob?
     
    John Stockdale, Dec 24, 2003
    #9
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