[MF3D.FORUM:337] Re: or a ouija board

["Stuart Johnson" <gcsphoto@xxxxxxxxxxxxx>]

Hi Tom,

        Humor well received and point taken!  You're right, there are too
many variables to get in
    the way of any one "rule", but I think the 1 in 30 rule is close
enough... and to just go with
    ones instincts in knowing what you may be getting while you 'set up' for
a shot...

    What are the "favorite" color films & ratings that people are using out
there?

    Royal Gold?  Provia?  Others?   25 ASA?

    I really liked using Kodak Royal Gold Print Film at ASA 25 in the 35mm
format....

      Cheers,  -Stuart


----- Original Message -----
From: Tom Deering <tmd@xxxxxxxxxxx>
To: Medium Format 3D Photography <MF3D.Forum@xxxxxxxxxxxxx>
Sent: Wednesday, March 29, 2000 3:15 AM
Subject: [MF3D.FORUM:334] or a ouija board


> On 3/28/00, Stuart Johnson wrote:
> >Finally, if Tom's formula is correct ( Base = 1 in FL of Lens )
> >then if I have a 100mm Base with my Hassy's and use 80mm
> >lenses, then the CLOSEST I can have my foreground is...  26 feet.
> >This can't be right....
>
> I can hear some of you chuckling.  Calling it *my* formula is like
> calling bacon "kosher".
>
> You want a rule?  Here's a *real* rule:
>
> # Because light travels very fast, almost instantaneously, it is possible
> # to estimate the distance between an observer and a thunderstorm from the
> # time difference between the lightning flash and the thunderclap. The
> # "rule of thumb" is that every five seconds time difference corresponds
> # to a mile distance. Is this correct? In imperial units sound travels at
> # approx. 0.2 mile/second (actually 0.214 mile/s) thus in five seconds
> # one mile is covered by sound and the "rule of thumb" is about right.
>
> *This* rule is everything the "1/30 rule" isn't.  It's just what it
> seems to be.  There are no special cases that invalidate it.  It's
> not wildly off under common circumstances.  Even a child can get
> within 7% the mathematically correct solution in their head.
>
> By comparison, the "1/30 rule" is a ouija board.  Witness the many
> misapplications of it in this thread alone.
>
> Can we talk about something else?  Astrology, maybe?
>
> Cheers,
>
> Tom
> --
> Tom Deering  --  voodoo@xxxxxxxxxxx  --  http://www.deering.org
>