I forgot to mention in my previous post that I am using a glass filter inside the camera after the Ross corrector. It is positioned between the Ross corrector and the film plane. Kirk Carbo Lobo's Services Ph: 800-225-0899 Fax: 225-677-8277 _______________________________________________ Astro-Photo mailing list Astro-Photo@seds.org http://seds.org/mailman/listinfo/astro-photo