Re: TECH-3D digest 164

[T3D Eric Goldstein <egoldste@xxxxxx>]

Greg asks:

> Suppose I want to pre (or post) flash my film to
> reduce contrast slightly and bring out the shadow
> details. How best to do it?
> 
> 1) Probably the easiest way (if the camera is on
> the tripod) is to place a diffuser over the lens(es)
> of the camera and do a second exposure.


Actually, you would want the flash exposure to be the first exposure or
the "pre-exposure." I suggest you check out the very useful methodology
outlined by Adams in his book "The Negative" available in most libraries
and in hardcover or paperback. The long and short of it is that you need
both the right quantity and quality of light for this pre-exposure,
quantity being arrived at a fairly simple emperical method...


Eric G.


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