Quote:
Originally Posted by pmrid
An ED80 is a nice relatively short tube that offers little wind resistance and would therefore be quite stable on an EQ6 even if there was a bit of a gust. Also the FOV of an ED80 is sufficiently wide to forgive the occasional 'shake'. So there would not be an overwhelming need for higher walls - this would be different if you were using say a 200mm F5 newtonian or something with a bit more wind resistance.
Since you won't be imaging bel9ow about 20 degrees in the east or west, high walls there won't be a problem. That will be different if you want to shoot north though where sometimes you have to live with a bit of parallax, dust and light pollution in order to get at objects you won't otherwise ever reach. So it's all about deciding what you want to see/image and with what equipment.
I favour high walls for wind protection since I am using big scopes but for you it would not be a priority item.
Peter
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thanks, Peter. after reading your post I had more of a think and will probably look to build high enough to block wind for an 8" dob. I will always live in suburbia so will always have houses around to block the view...
since I have hijacked this thread I might start a new one. sorry to the OP.