400mm f/4 ED(IF) Test

Discussion in 'Medium Format' started by michael_reichmann|1, Mar 3, 2002.

  1. I have just published a test of the Pentax 67's 400mm f/4 ED(IF), including some examples from a wildlife shoot in Yellowstone National Park.

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    The report includes a comparison with the 600mm f/4 and also with the new 300mm f/4 ED(IF) used with a 1.4X Extender.

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    The lens review is found at http://www.luminous-landscape.com/p400ed.htm and the comparison test at http://www.luminous-landscape.com/3-4-6-comp.htm

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    I'll be pleased to answer any questions about these lenses that I can.

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    Michael
    The Luminous Landscape
     
  2. Nice test Michael. One additional point about rear filters, is that
    when using the DOF scale, your new hyperfocal distance must be based
    on the new infinity mark. It is helpful to put the "filter caused"
    infinity mark on the lens. The 400 ED works well with the conventional
    glass 1.4x converter because the most important part of the optical
    train for color prevention is up front. It is always the first few
    elements that are ED. There is so little color aberration by the time
    the image reaches the converter that the image remains nearly as good
    as if there were no converter. The 400 Takumar has much less
    longitudinal chromatic than the 600 and I have always felt that it was
    about the focal length limit of conventional glass. A 400 Takumar, 400
    ED comparison would be interesting. Unfortunately, I can't afford the
    400ED or 800ED.
     
  3. To THOROUGHLY muddy the issue - what about the 500mm?
     
  4. Michael's test on the 600mm paints a picture of unacceptable
    chromatic aberration for this lens. After going through several of my
    slides from the 600, it is obvoius that fringe free shots can be had,
    especially when taken in diffuse light and stopped down quite a bit.
    Publishers that buy my work do not enlarge more than 4 or 5x so
    fringing is not a problem when shot as explained above.
     

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