Re: [APML] Medium format wide field scopes

[Chris1011@aol.com]

In a message dated 3/27/2002 2:07:51 PM Pacific Standard Time, mstecker@dslextreme.com writes:


>   For those that are interested there is a CCD image of the core of Eta Carina Nebula taken with the Megrez 80SD refractor through an H-alpha filter at:
>   


Actually, with narrow band filters, you can image with a singlet lens (chromat). You don't even need an achromat. Wolfgang Lille in Germany has taken some really outstanding H-alpha images of the sun with a 13" single element chromat lens.

Roland Christen