Dealing with Dew - Takahashi Epsilon

Deepan Vishal:
Hi, 

All Epsilon/Reflectors users, how do you deal with the dew?

I recently acquired an Epsilon 180 and have been imaging with it during the winter which has been dry. With the onset of spring, I am starting to see more dew. And I am expecting the dew to get heavier during the summer..
When I say dew, it heavily fogs up my primary and secondary.  

As a desperate measure, I coupled two dew heaters and wrapped it on the OTA near the spider vanes, like how it is used in refractors. Which didn't do much to keep off the dew. 

I've been reading about the secondary mirror heaters, primary mirror fans and dew shield. 

Which of these is really effective? 

I appreciate your inputs. 

Thanks,
Deepan

andrea tasselli:
Best of all is to isolate the whole tube with reflective foam sheet AND add a rear fan (sucking, not blowing) AND add a dew shield, possibly made of the same reflective foam sheet.

*** Type your reply here *

andrea tasselli:

andrea tasselli:
Best of all is to isolate the whole tube with reflective foam sheet AND add a rear fan (sucking, not blowing) AND add a dew shield, possibly made of the same reflective foam sheet.

*** Type your reply here *

*That is eactly what I meant. Kudos!