red dwalf Posted January 10, 2012 Share Posted January 10, 2012 well having bought some Baader wonder fluid for x mas, i decided i`d clean the corrector plate on the SCT, put it back together last night, tonight "Monday" it was clearish here and there Moon bright but Jupiter looked tempting, so i set up an 7pm. firstly i slewed to a bright star to check the colmination of the scope, it was way off ! Don`t know how as i put the corrector plate back exactly where it came from. i had a horriable disc Pattern with a white line from the middle of the airy disc to the edge, so i let out the colmination screws a full turn and started again, after a while i managed to get it as near as possiable and thought i`d have a look at M42, amazing site as usual, then dew formed everywhere, ran inside for the hairdryer to clean off the corrector and moved on the webcam Jupiter, what a pain, it seems to work for me first time or not at all, spent about an hour and a half and ended up with 1000 frames of rubbish, too ashamed to post it L.O.L. massive problem with more dew everytime i tried to get good focus had to keep getting hairdryer out, neighbours must have thought i was nuts. well i`ll keep trying, i might post the image when i`ve had more chance to do something with it. "like delete it" Link to comment Share on other sites More sharing options...
+Ibbo Posted January 10, 2012 Share Posted January 10, 2012 The SCT corector plate is what I call the Dew Collector I use both a heater tape and a camping mat about a foot long,it usually keeps the dew off long enough to get a good number of avi's Link to comment Share on other sites More sharing options...
Doc Posted January 10, 2012 Share Posted January 10, 2012 At least you have mastered the dark art of collimating. Link to comment Share on other sites More sharing options...
philjay Posted January 10, 2012 Share Posted January 10, 2012 Dew is a big problem with the SCT. I made an integral heater for my old C11 so it was as close as possible to the corrector plate and then made a 24" long dew shield out of a Homebase flip top bin, that worked quite well but was an excellent sail in teh wind. Phil Link to comment Share on other sites More sharing options...
Guest Dex55 Posted January 15, 2012 Share Posted January 15, 2012 Would a heated dew shield help you? I bought one made by Astro Zap for my SCT, and it works a treat. Link to comment Share on other sites More sharing options...
red dwalf Posted January 15, 2012 Author Share Posted January 15, 2012 i would i think Derek, got to get something sorted for sure, noticed that you have a Baader Aspheric 36mm Hyperion in your collection, what do you think of it ? looking for either a 32mm or 36mm for my collection for widefiled viewing. Link to comment Share on other sites More sharing options...
Guest Tweedledum Posted January 15, 2012 Share Posted January 15, 2012 (edited) I just don't go out without dewshield on now! Edited January 15, 2012 by Tweedledum Link to comment Share on other sites More sharing options...
andyboy1970 Posted January 15, 2012 Share Posted January 15, 2012 I use a dew-shield made from camping mat as I didn't want to introduce heat, it works a treat. As said its about 2 foot long and since I started using it I haven't had a dew problem. Link to comment Share on other sites More sharing options...
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