Hey Patrick; Some months ago, there was a thread about making dew shields. They are very easy to make out of various materials. One of the best materials is thin closed-cell foam that is originally intended for backpacking sleeping pads. Try to find foam that is flat (not corrugated) and thin, around 3/8". If you would like help with making one, just bring the foam to one of the ATM sessions (next one is this Saturday), and you'll end up with a decent dew shield. Shields such as this do a good job of passively keeping dew at bay, but if you want a more robust solution, you would want a dew heater. These are more difficult to make, but if you are good with a soldering iron, they are doable by the ATMer. If you have a hard time finding the closed cell foam as I've described, let me know, I may be able to help you find some. Take care, Mat -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Wiggins Patrick Sent: Tuesday, October 30, 2012 9:12 PM To: utah astronomy listserve utah astronomy Subject: [Utah-astronomy] Frost prevention Hello list, Now that it's trying to get cold I'm thinking again about keeping frost off my corrector plate this coming winter. That, of course, has me thinking of Joe's "Frosty the Telescope" picture. :) But seriously, IIRC there was some talk here last year about someone local making custom dew shields for SCTs. Who was that? I'm thinking it might be time to get one for my C-14. Thanks! patrick _______________________________________________ Utah-Astronomy mailing list http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Send messages to the list to Utah-Astronomy@mailman.xmission.com The Utah-Astronomy mailing list is not affiliated with any astronomy club. To unsubscribe go to: http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Then enter your email address in the space provided and click on "Unsubscribe or edit options". This message and any attachments are solely for the use of intended recipients. The information contained herein may include trade secrets, protected health or personal information, privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you are not an intended recipient, you are hereby notified that you received this email in error, and that any review, dissemination, distribution or copying of this email and any attachment is strictly prohibited. If you have received this email in error, please contact the sender and delete the message and any attachment from your system. Thank you for your cooperation