Again thank you for the replies.
Quote:
Originally Posted by dannat
if its a good mirror why not just re-coat?
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I'm not sure how good my mirror is, it works fine but I've never tried anything else. It was fairly cheap, part of a kitset with sonotube and no-name plastic focuser which I later replaced with a proper Crayford. So I don't have particularly high expectations as to the mirror's quality
Quote:
Originally Posted by el_draco
If you want a good combo, get a C11 and try for hyperstar. Going that way myself
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Yeah the C11 is very nice and I like that it is so compact. But I figure I can build a scope at least as good, and then I can fiddle with it as I please. I also prefer only having the 2 optical surfaces of the Newton rather than the C11's 4.
Quote:
Originally Posted by Alchemy
Late reply, the truss design on the pic looks good, weight then becomes a factor, 10 inch you could get away with it perhaps. 12 inch .... Not on a g11.
But doesn't it look good  |
It looks great yes
I'm currently trying to not be deceived by it's looks... and you are probably right about the weight.
And thanks for your advice re welding Alex, I was thinking about getting someone to do a few welds on it for me.
Overall I definitely like the truss tube design and think I could build one without too much hassle. However, now I'm wondering about how to attach the truss tube to the mount? The central brace is rather narrow...
I already have my current OTA mounted in 12" tube rings from Parallax, sitting on a long dovetail. It seems to me this type of connection would be more stable than the narrow brace of the truss tube?
Another issue I thought of was how to keep the spiders out of the truss tube. They are instantly going to string their webs when they see those trusses
Does anybody have experience with this?
So another option is a solid aluminium tube, I noticed Parallax sell them by the foot for a reasonable price.
Is alu tubing a good option?
Is there a supplier closer to here?
I kind of like the simplicity of a solid tube, and it would keep the bugs out too