P3D Re: the springsteen challenge & deering's calculator

[Tom Deering <tmd@xxxxxxxxxxx>]

On 8/30/98, CanterMike@xxxxxxx wrote:
>In looking at Tom's illustration "winner2.gif" I am struck by how many of the
>curves shown overlap for sometimes considerable portions and particularly how
>close the 1:30 line is  to all of them for many situations.  Although the 1:30
>rule can be way off for certain extremes, it clearly is an acceptable "rule of
>thumb" for many, if not most, mainstream applications.

Yes, it's way off for extremes, like closeups. And it doesn't work for long
lenses, either.  Use a 70mm lens or shoot closeups, and it's not even
close. But no doubt, it works for shorter lenses in many cases.

But the illustration is misleading for the purpose of discussing the 1:30
rule because it uses a log scale that favors the larger distances where the
1:30 is acceptable.  See http://www.deering.org/macro.gif instead.
..
Cheers.

Tom



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