[Laser] Re: street light EME-update

[F1AVYopto at aol.com]

>Does anyone have any bandpass filters for the sodium lines,  
>especially the 589 nM line? I think they are probably available, but  
>like so much of the parts we need, they are probably horribly  expensive.

Art
I buy my filters from a canadian broker :
Some of  them are very low cost but have good quality.
Look at  
http://stores.cafr.ebay.ca/BJOMEJAG-EBUYER-STORE
Yves