[photo-3d] UFO's in my slide show

["Howard Wade" <HWADE@xxxxxxxx>]

I flew from Eugene OR to Pensacola FL to visit my son. I'm borrowing 
a Nord projector from Mark Hatfield of this list who lives nearby so 
I can do a slide show tomorrow night for a fairly large group. 
Practicing with the projector this evening on some of my slides and a 
weird phenomenon occurred. I'd put in a slide and it would look fine, 
then after 5 or 10 seconds an Unidentified Fogging Object appeared. 
It was, as far as I could tell, always from the left lens, and it 
looked like moisture in an oval shape around the center of the image, 
probably covering 80% when it appeared and shrinking to 25% before I 
pulled it out in a panic. At first I thought the slides were 
overheating, but that didn't seem to be the case and it looked more 
like moisture.

Any idea what's going on? Could it be moisture in the projector? Why 
wouldn't it show at the very beginning? Suggestions appreciated... 
Don't answer off-list because I won't see it till I get back home.

Thanks,

Howard D Wade
hwade@xxxxxxxx