How make a Dew shield for GSO RC-12

[Spookyer]

Hi all, I need to get a dew shield happening for my RC-12. Any tips with what I should get to make one and where I should get it?

thanks
Brett

[lazjen]

This is what I got for my RC10: https://www.bintel.com.au/product/farpoint-flexible-dew-shields/

It works well.

[04Stefan07]

Bintel is your best bet as what Chris said :).

It would be a lot cheaper to make one but some of us just like to purchase an already made product. Yes it's more expensive but way more convenient (and sometimes works better).

I can be a bit of both but with Astronomy I tend to purchase pre-made stuff. You can also make your own dew straps if you know your way around some electronics.

[Spookyer]

thanks guys

[Paul Haese]

Hi Brett,

don't buy a dew shield. I am assuming you are having trouble with dew on the secondary. If so, drill a hole in the secondary holding plate (take the secondary assembly apart before hand) and install a Kendrick dew heater into that space and then run a power line along the truss. Put a shroud over the truss and you are in business. I never have dew on the secondary now and I have my scopes in a very dewy site. See photo.

[Spookyer]

No, getting dew on the primary Paul on my steel tube RC. Will see if the shield helps.

[Paul Haese]

Are you running your fans all the time? If not, then you need to do that. I never got dew on my primary and that is with a truss.

[J.P.Kallinkoski]

Greetings from Finland,


I have 12" GSO RC , and i have heaters on both, primary and secondary mirror. i also keep the fans on when imaging on high humidity.


The primary mirror with the heating resistance

http://i844.photobucket.com/albums/ab8/JuhaPeKa/GSO%2012%20RC%20Gemini%20Modified/primary%20mirror_zpshuhj0y8r.jpg

Secondary heater

http://i844.photobucket.com/albums/ab8/JuhaPeKa/GSO%2012%20RC%20Gemini%20Modified/IMG_20170502_221405_zpsiao6vew0.jpg