Why bother calculating hyper focal distance

Discussion in 'Australia Photography' started by Mark, Nov 27, 2003.

  1. Mark

    Mark Guest

    What advantage is gained over just stopping down to the lowest possible
    f-stop and obtain maximum sharpness.
     
    Mark, Nov 27, 2003
    #1
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  2. Mark

    Miro Guest


    The lowest possible isnt the same as the best f-stop. For each lens the best
    f-stop is calculated from performance tests.
     
    Miro, Nov 27, 2003
    #2
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  3. Mark

    Wiz Guest


    Circles of confusion - if you need big ones or little ones.

    w1
     
    Wiz, Nov 27, 2003
    #3
  4. Mark

    Wiz Guest

    Miro I don't think that was the intended reply.

    Its not lens performance in question but one of DOF.

    Q. Why bother calculating hyper focal distance when you can just close
    the lens down.

    W1
     
    Wiz, Nov 27, 2003
    #4
  5. Mark

    Mark Guest

    I should have worded that differently.

    Lets say you test your lens and find the Fstop where quality begins to fall
    of and not stop if down further, then just use when you want max DOF.
     
    Mark, Nov 27, 2003
    #5
  6. Mark

    Miro Guest

    The spinny ring making darker photo diffractions the photo, more gooder
    darkening not always down to pitch black. Best darken to balance of highest
    qualitating.
     
    Miro, Nov 27, 2003
    #6
  7. Mark

    Vin Guest

    Two different things, you can still calculate hfd for the
    lowest possible f-stop.

    If you set to lowest possible fstop and focus at infinity,
    you are getting less dof than if you set it at the
    hyperfocal. You use the max dof if you focus at the
    hyperfocal for any fstop (hyperfocal is different depending
    on coc, focal length and aperture)
     
    Vin, Nov 27, 2003
    #7
  8. Mark

    k Guest

    maximizing your depth of field over any given aperture, stopping down need not
    do this and can still leave bits out of focus which may have the potential to be
    _in_ focus were the hyperfocal distance taken into account.


    k
     
    k, Nov 28, 2003
    #8
  9. Mark

    Glenn Guest

    Wouldn't the Hyperfocal distance achieve you getting the greatest distance
    of focus from the near point to the far point that you would require in
    focus
    while shutting down to the lowest possible F Stop would give you the biggest
    range, there is no garantee that you will get the maximum from it.
    Especially if you missed the focus point by a good 30 metres (Yep done it)
    Also. Best from a lense optically is generally 2 stops from minimum aperture

    Anyway, shoot landscapes not an issue, but in Macro on short distances, it's
    a good tool to be able to calculate the Hyperfocal distance to get the most
    out of it. That way you can tell at what point you actually really need to
    focus on and what F stop and shutter speed is required.
     
    Glenn, Dec 4, 2003
    #9
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