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First Light for my OO/Helmerichs 300mm Newtonian: 15th Aug 2021

Captain Scarlet

By Captain Scarlet
in Observing - Reports

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Captain Scarlet

Captain Scarlet

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11 hours ago, CraigT82 said:

…  Regarding the mirror cell, I have some preliminary designs sketched up in AutoCAD if you want to take a look? My intention is to fabricate one for my SW 12" mirror which is larger as you know, but might give you some ideas. Let me know. 

Cheers 

I have the “build your own Dobsonian” book by Kriege which has a section on building cells, and also dondd we ideas of my own. I would be interested to see your designs too, do yes please send me your sketches please.

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Captain Scarlet
Captain Scarlet

Last year, during lockdown, I replaced the 12” mirror on my blue-tube SW newt with an OO mirror. The OO had a longer FL than the SW original, so I ordered a custom-specified carbon tube from Klaus Hel

CraigT82
CraigT82

Great report Magnus. I'm a bit disappointed to see that the thread title wasn't "First Light for Triggers Broom" but it'll do as is I suppose!  Seriously nice looking scope. Regarding the mirror

Captain Scarlet
Captain Scarlet

That I couldn't say Jeremy - I've actually never seen an OO tube. I'm not too concerned about the weight: it's the stiffness I was really looking forward to. The 5kg weight saving is a bonus.

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