You mean rotate the eyepiece with the filter set to max transmission? I would think using the polarizing feature itself would just block it out entirely. I have a polarizing Moon filter (Orion, $35) that goes from 1 to 40% transmission we can try next time on M1. Jack ----- Original Message ----- From: <beevo1@xxxxxxx> To: <az-observing@xxxxxxxxxxxxx> Cc: "L Knauth" <Knauth@xxxxxxx> Sent: Thursday, November 15, 2007 11:08 AM Subject: [AZ-Observing] Re: Fun with M1 Polarizing filter in the eyepiece and rotate the eyepiece? Beevo -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list. -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.