DOF is arbitrary, depending on the degree of sharpness required. Lenses'
DOF usually assumes max enlargement to 8x10". If you anticipate more
enlargement, be more conservative and use the markings for a wider
aperture.
tOM
On Wednesday, October 02, 2002 at 20:52, C.H.Ling <olympus@xxxxxxxxxxxxxxx>
écrit re "Re: [OM] scales in m/ft" saying:
> Most people forgot the DOF marks on the lens, it is very useful in party.
> With a group of people playing, use a wide angle, check the range you want
> to cover e.g 6-12 feet, set a proper aperture e.g. F8 and adjust the
> focusing distance (in this case around 8 feet) so that the subjects are
> within the DOF range then you can proper get what you wanted. It can also
> let you know what aperture is needed to cover a certain range. As you have
> mentioned, preset a focusing distance can work faster, even AF is too slow
> in many cases.
>
> C.H.Ling
>
> ----- Original Message -----
> From: <zuiko@xxxxx>
>
>
>
> > I would just like to know,
> >
> > Does any of you really bother about the scales in meters or feet on your
> > lenses. I never look at it, I just look if the subject I want is in focus,
> > I do nut use my lenses to measure the distance... (for that I use a
> > meter!). Is this just a relic from pre-slr times, or has it more to it
> (for
> > macro?)
> > Or do you use it to pre-set a distance for faster focussing? (as a kind of
> > 'manual-autofocus' ;)
> >
> > iwert
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tOM Trottier, ICQ:57647974 http://abacurial.com
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"The moment one gives close attention to anything,
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awesome, indescribably magnificent world in itself --
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