T3D Re: medium format macro stereo

[Tom Deering <tmd@xxxxxxxxxxx>]

>(Simple?) conclusion:  In macro work, whether you consider geometrical
>or physical optics or both, it is only the diameter of the hole in the
>iris as seen from the front of the lens that matters.  That hole's
>diameter tells you how much DOF you will have.  The total film area to
>be exposed tells you how much light has to pass through that hole.  The
>MF vs 35 mm macro example is that when you go up to MF, you have doubled
>the size of the format which means you have four times as much film area
>to expose so you need two stops (4X) more light to expose the film.  In
>LF macro, you will have a 4X larger format meaning you need 16 times as
>much light (4 stops more light).


It is so cool to get the true religion on this subject.  I swear, this is
all sinking in.

To get around the light problem, I intend to use one big strobe.  If that
doesn't do it, I could add another strobe, or hit a non-moving subject
multiple times with the same strobe.

Wish me luck.

Tom



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End of TECH-3D Digest 378
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