The URL for the Lumicon web site was passed along to me so I'm passing it to all of you. http://www.rahul.net/resource/regular/products/lumicon/ It looks to me to be their catalog converted to html. That also means there is some outdated information in it. I'll have to bug Jack (Marling) about it when I see him again. :-) Chuck <aa6g@aa6g.org>