what is it ? it is 15 1/2"dia 2 1/2 thick could start a fire on cloudy day 814 603 1781
Maybe a lens that was mounted over top of a large diameter ships compass ?
looks like it swiveled
It is rather thick, so it's focus length is going to be very short, perhaps a searchlight lens?
(Magnifying a compass that is already 15 inches wide doesn't seem usefull..)
maybe lighthouse
Lighthouse lens are usually Fresnel type
gotta agree with you Rusty, your idea sound logical
surely it must be some kind of stage lighting?
yours Scott
Quote from: scottg on October 23, 2012, 12:25:15 PM
surely it must be some kind of stage lighting?
yours Scott
Good thought but I've never seen brass on any stage equipment.
Brass/bronze sez marine or medical/scientific to me.
...Rob
Brass also suggest explosion proof/non-sparking environment to me.
This looks similar....
(http://curiousscience.com/slir/w620-h500/images/stock/img347.jpg)
http://curiousscience.com/1/Scientific/Large-magnifier-on-stand-P347.html (http://curiousscience.com/1/Scientific/Large-magnifier-on-stand-P347.html)
I've made a few of these over the years for stage props.
...Rob
I probably wouldn't take much of a light behind that lens to make a real bright spot light??????????
Mel