It was humid here last night and I got in about five hours before the marine layer came in and ended my session. The corrector plate was still dry. I was very pleased with its performance on the first time out.

I wanted to let you know I tried it with my TV-101 and with my Pronto on two extremely dewy evenings over the weekend, and the objective(s) stayed dry and clear. Your Dew Shield worked exactly as claimed and I couldn't be more pleased.

I have used the system for as much as 6 hours in sub zero F temps without any frost on the corrector. The telescope spent last summer on the shore of Lake Michigan with heat tapes, wires, hair dryers, etc. I can't wait to get back this summer and try out the Dewshield in that very humid environment with it's rapid temperature drop after sunset.

I'm "beyond paranoid" when it comes to letting dew form on my Takahashi FS-102 and purchased my electric dew heaters the same day I got my scope. For a long time, I never set up my scope without them on. Then I attended a particularly dewy star party where a couple of the participants were using Richard's Insulated Dew Shields and got to watch first-hand just how effective they were. Today, I still use the "electric" heater to keep my old laptop screen from greying out and to keep my eyepieces toasty, but I've learned to trust my prized APO to the IDS. It also does a great job of blocking the neighbor's lights when I'm imaging off my back deck and I recommend them highly.

Just a short note that I had 3 nights that were reasonably clear and filled with moisture. The dew shield for my C-11 worked absolutely perfectly. Great job!!!! I could not be more pleased!!! Four stars!!!Thanks!

It just so happened that I had been using heaters to do my anti-dew work, and I continued to use them with the Insulated Dew Shield. At first, I was happy because the dewshield seemed to increase the effectiveness of the heaters. Then, as an experiment, I turned off the dew heaters. Several things happened.

Number one, the quality of my images improved. I do mostly CCD imaging, and the increase in contrast and sharpness was very evident. After a little experimenting, it became clear that the heaters were distorting my optics. Because the heater only heats the edge of the optic, it was introducing subtle distortions that were affecting image quality. The results of using the Insulated Dew Shield on my images can be seen at www.wodaski.com.

Number two, the Insulated Dew Shield was as effective with the heat turned off as it had been with the heat turned on! It made it possible for me to eliminate some of the wiring around my scope. Here the humidity is high and dew formation is common. The Insulated Dew Shield keeps it off my corrector plate.

I now own several Insulated Dew Shields, for SCTs and refractors. I've gone as long as 12 hours observing in the winter months, from 6PM to 6AM, without a dew problem.