Joe, Certainly the 12" corrector plate is too big to easily remove frost with the 12V hair dryer. But if you use the dryer to add heat now and again to keep the corrector plate above the dew point, then it might work okay to prevent frost from forming in the first place. But as I said in my original post, anyone is welcome to try mine out when we observe together and then you'll know for sure if it works for your equipment. The dew cap that is in the works for you is also a necessary part of dew avoidance. Mat -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Joe Bauman Sent: Tuesday, November 29, 2011 1:55 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Saturday observing report Yes, I have a feeling my 12" corrector plate would be too big to get the frost off that way. Sigh. Thanks, Joe ________________________________ From: "Hutchings, Mat (H USA)" <mat.hutchings@siemens.com> To: Utah Astronomy <utah-astronomy@mailman.xmission.com> Sent: Monday, November 28, 2011 4:56 PM Subject: [Utah-astronomy] Saturday observing report Several of us (Jay, Jeff, Jorge, Mark, my 2 young daughters and I) made it out to Pit-N-Pole for an observing session last Saturday evening. It was a bittersweet time. Sweet because the skies were really clear and steady. Bitter because frost started settling by around 7:00 pm. That seems really early for frost like we got, but that's what happened. Of course it did not get any better after that. The frostiness continued but I was able to use my newly acquired 12V hair dryer to heat my eyepiece to the point that it would not fog over as soon as my eye was close to it. Each heating session would last for about 30 minutes or so then I would have to apply more heat. Anyone considering this option to dew management should know that it worked well for me and it is hard to beat the $15.00 price tag. You have to be able to power it with something that has a cigarette lighter power connection. I use my jump starter battery. If your car is close, you can use the cigarette lighter or any similar accessory power connection. If you are considering dew busting devices, feel free to use my hair dryer anytime we are observing together. Just don't try to dry your hair, as there is very little heat and air that comes from that dryer. I don't think it would work well for a SCT type telescope as the corrector plate is just too large to heat with the dryer. But again, try mine out, then you'll know. Anyway, back to the observing session, we called it a night after 11:00 or so. We had good times enjoying the night skies, but the frost got to us early. As usual for this hobby, observing the night sky is only part of the enjoyment, good conversation with like minded people makes the evening a good time. Mark's heater made it a great time, especially for my daughters! Keep looking up! Mat ---------------------------------------------------------------------------- This message and any included attachments are from Siemens Medical Solutions and are intended only for the addressee(s). The information contained herein may include trade secrets or privileged or otherwise confidential information. Unauthorized review, forwarding, printing, copying, distributing, or using such information is strictly prohibited and may be unlawful. If you received this message in error, or have reason to believe you are not authorized to receive it, please promptly delete this message and notify the sender by e-mail with a copy to Central.SecurityOffice@siemens.com Thank you _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php _______________________________________________ Utah-Astronomy mailing list Utah-Astronomy@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/utah-astronomy Visit the Photo Gallery: http://www.slas.us/gallery2/main.php