Filmscanners mailing list archive (filmscanners@halftone.co.uk)
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: filmscanners: Re: looking at the Sun
> Most glasses absorb UV much more strongly than IR. Most of
> the materials used for sun viewing and photography (eclipse
> goggles) have a (log10) density of 5-8 for UV and visible,
> and less than 5 for IR.
>
> The worst of the lot is fogged colour negative film, which
> is fine in the UV & visible, but lethal to eyes because it's
> transparent to IR.
>
This is why ICE works with color negatives. They are semi-transparent to IR
but the scratches and dust are not. The same reasoning and warning should
apply to color slides (but not Kodachromes).
|
