Extension Tubes or Macro Lens?

Discussion in 'Digital SLR' started by Edward Holt, Mar 2, 2006.

  1. Edward Holt

    Edward Holt Guest

    What's the advantage of a macro lens over a normal lens plus extension
    tubes?
     
    Edward Holt, Mar 2, 2006
    #1
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  2. Edward Holt

    Paul Furman Guest

    You can't focus to infinity with an extension tube so a macro is handy
    in the field.

    Macro lenses have flat field for technical work.

    Macros are optimized for closeup with regards to all the inherent
    compromises in lens design like abberations & such (complex stuff <g>).
     
    Paul Furman, Mar 2, 2006
    #2
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  3. Edward Holt

    Tony Polson Guest


    In general, the optics of a macro lens is optimised for close-op work.
    The optics of a normal lens are optimised at infinity.

    Having said that, it is possible to get good results with some normal
    lenses used with extension tubes. It depends on the lens.
     
    Tony Polson, Mar 2, 2006
    #3
  4. Edward Holt

    Hils Guest

    Paul Furman wrote
    IMX the major practical downside to tubes vis-a-vis a macro lens was
    having to change tubes in the field to cover the same magnification
    range as a macro lens. It's quite possible to get more than adequate
    results using tubes with a good lens.
     
    Hils, Mar 3, 2006
    #4
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