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Old 11-07-2018, 04:56 PM
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astronobob (Bob)
Casual Cosmos Capturer

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Join Date: Jun 2010
Location: Gold Coast SE QLD
Posts: 4,190
Opinions: Rotating Flex-Dob Shroud 120*

Hi all 'Astro'liano's

I am finding this Flex Tube Dob is quite large - Good 'Light-Bucket'
But the Finder is awkward to reach around zenith - The Base is around 1meter in diameter, if memory serves - 33". Both the Focuser & Finder stand just over 6' when around zenith.
I definitely need a small step to reach them but lunging out another 500mm to get my eye near the Finder is risking a hazard of landing in/on the mirror, haha, or should I admit- I have fell into the scope, well, I managed to straddle around it after gravity failed me, Lol, no damage/consequences - nor embarrassment as I was alone

Some home-made Dobs of this size have had the focuser & Finder attached on or near the bottom of the scope shroud for easier access, makes a lot of sense, and as many know, it a great Idea

So, I am considering Rotating this shroud 120 degrees, as there are 3 trusses placed 120 deg apart'
There is one large bolt on top of each of three trusses holding the shroud to them.

My question is whether this would hamper any collimation factors ?
I would assume all trusses would/should be exactly the same length & all parallel - within reason ?

I guess one can only try it and if ok, great bananas, if not- put it back
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