P3D Re: PHOTO-3D digest 2882

[Ronald Beck <ronald-beck@xxxxxx>]

Bruce says...
> Andrea's question about where to measure from was on my mind too.  I
> only have a 35-70 zoom on my SLR and was foolishly measuring from the
> foremost lens to the near point on my main subject - 15 inches.  I
> took a series of shots in this, my first close-up tabletop attempt,
> beginning with the 1/2 inch (1/30th) base, then increasing 1/2 inch
> for each succeeding shot, perhaps up to 2.5 inches.  The pairs that
> finally pleased my eye were more like 1.5 to 2 inches base, FL on lens
> near 50, so I have no idea what happened.  Which I guess puts me for
> now in the "don't worry, shoot happy" class.  But it's an uneasy state.

So, using the 1/30 rule, if the distance from your foremost lens to your
subject gave you a 1/2 inch base, what would a measurement from the film
plane to your subject (15 inches + distance from foremost lens to film
plane) give you?  Is this closer the the 1.5 to 2 inch separation you
were satisfied with?  Or, is this still a bit hyper and you are more
partial to hyper close ups?

I think some experimentation in this area to validate the calculations
might be in order.

Ron


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