Should I buy a 4.0 or 5.6 Rodagon?

Discussion in 'Enlarging' started by gphoto120, Jul 6, 2006.

  1. gphoto120

    gphoto120 Subscriber

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    I'm purchasing a used enlarging lens and would like to know any benefits of the 4.0 over the 5.6 Rodenstock enlarging lenses ?
    Thanks for any input !
    GP
     
  2. Claire Senft

    Claire Senft Member

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    Why not tells us more about what you wish to accomplish.
     
  3. Lopaka

    Lopaka Member

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    What focal length are you looking at? Is the f4.0 an APO? If you are doing B&W I don't think the higher price of the APO will buy you anything over the non-APO. There may be some benefit of the APO for very large color printing. Again - we can be more helpful if we know what your main printing intentions are.

    Bob
     
  4. davetravis

    davetravis Member

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    Besides from the obvious difference of one f stop, that one stop can make a big difference during your printing "routine." I find most lenses are sharpest stopped down 2 to 3 stops. With the F4 that would be F8 or F11, a one stop advantage when determining exposure times. The minimum I use is 2 stops for flatness of field. Also, I think the F4 is a six element. I use the APO only when going 20x24.
    Good luck.
     
  5. gphoto120

    gphoto120 Subscriber

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    Sorry ...I had forgotten to write that the lens is an 80mm for 6x6 format . . Also, that I don't plan to enlarge any prints larger than @ 12x12" in B&W.

    GP
     
  6. Dave Miller

    Dave Miller Member

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    For that application I doubt that you will see any benefit from the f4; so go with the f5.6.
     
  7. davetravis

    davetravis Member

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    This Dave agrees with that Dave! :tongue: