Archived posting to the Leica Users Group, 1998/02/08
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Dear Doctors of Leica - I realize that the following is not a Leica-related question, but anyone with experience shooting slides and evaluating them on a lightbox with a loupe may be able to comment or assist. I have had a custom made 19"x25" lightbox for the past few years (5000 Kelvin rating) with 2 flourescent tubes and a (non-electronic) ballast/transformer inside the box. When I use this thing for more than about 10 minutes I begin to experience a headache and nausea (no, it's not from the poor quality of my slides). I think the problem is either the flickering of the tubes (60 Hz) or the EMF radiation from the transformer, but I'm not sure which it is. I welcome comments regarding both "diagnosis" and "cure" (there are high end boxes from Kaiser/Macbeth/Just with electronic ballasts and with higher frequency tubes -- in addition I guess I could remove the transformer from the box and put it on the cord). Thanks, John McLeod