[photo-3d] Re: Velvia

[Chris Schneberger <chris@xxxxxxxxxx>]

Regarding "perfect" exposure and viewing systems:  I wouldn't use the word
"perfect", because there is some relativity involved.  But with slide film you
don't have much latitude to play with.  I'm trying to produce slides that
retain detail in the shadows while approaching maximum density, and highlights
that also retain detail.  Those qualities shouldn't change much from viewer to
viewer or projection.  If I've overexposed my film and lost highlight detail,
it won't suddenly appear with a dimmer projection.  Moreover, I would argue
that it's better to calibrate your viewing system to display correctly exposed slides.

Generally, I'm looking at slides projected, but for stereo I use a Battery
powered Realist viewer.

As far as exposure and bracketing goes, the best thing you can do is have an
accurate light meter, preferably incident.  Once your meter is calibrated, you
can be pretty assured that your exposures will be acceptable.  But I would
recommend bracketing 1/2 stops for insurance.  Small amounts of exposure make
a huge difference in slide films.  I've seen a 1/3 stop difference make or
break an image.  So don't disregard those tenths of a stop!  If my meter says
f11.7, I call it f11 2/3 and set my aperture accordingly.  B/W negatives are
different and not so sensitive, so I bracket full stops.

Chris Schneberger

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