In article <19970112061900.BAA13318@ladder01.news.aol.com>, avedon8530@aol.com says...

>I was wondering what the best EI for Velvia would be, in your opinions,
>for great color saturation. I always thought it was either 32 or 40. The
>other day I was told that I should index it at 64. I've always practiced
>that overexposure was the best way to go for color saturation. I just
>wanted some clarity around this and make sure I wasn't missing something.

With properly-calibrated meters (i. e., ones that generally produce good
slide densities with a variety of brands/speeds of slide film and shooting
conditions), Velvia is normally 40, though I find that with some strong
colors predominating, different speed ratings may be appropriate with
this film. BTW, you probably meant "underexposure", though I think
this is bad practice, since it shifts the average closer to
disasterous exposure error, and brings the
average density to a less
standard level.
Hope This Helps