This may be of use in a laser show?

[Astroguy]

http://cgi.ebay.com/LASER-POWER-OPTI...em250093706647

[allthatwhichis]

And what the F does that $900 beast do? I also don't like those "surplus" sellers. They know little to nothing about what they sell and it's all "as is"... Looks like a big AOM. That's my dumb ass (da) assesment though. That thing looks big too.

[buffo]

Looks like maybe a set of filters on mechanical linkages - something like a color box perhaps?

I don't know that I want to spend $50 just to find out though.

Adam

[Astroguy]

Its not that big and it may be good for dropping different glass like lumna effects or gradient filters.