Reply To: Photographs vs The Scanner.

#132800
Susan Knoer
Member

There’s a paper by Tim Vitale at http://www.city-gallery.com/learning/guide/light-levels.php.   The relevant part is “Flash illumination has a very short duration, 1/1000-1/4000 of a second; thus, the lux-hrs are very low”   Vitale is a well respected conservator, so you might look for his other papers on the subject.