12.5" Dob for CCD

Although I know there are always trade-offs, I decided to build a 12.5" dobsonian that will be used for visual use and CCD photography. I plan on getting a Tom O. platform for tracking the sky. I will probably go with a ST-2000XM for a camera (if I can scrape together the funds).

I've ordered a very good mirror and plan on investing in an excellent cell and focuser. I expect to design this dob a bit heavier and more stable than most.

The question is-- Is there any general design guidance any of you can offer? For instance, I'm not sure if I should go with a very rigid truss or minimal secondary support (to reduce wind resistance). Would it be wise for me to build in a way to 'lock' the position of the dob? etc, etc...

Thanks for you time.

-David

If you want to do photos, make it stiff and rigid. The more solid the more stable and less vibration.
This is my 12.5" DOB, it is pretty steady. I think that bigger alt bearings would hav been better though, I have a little vibration when you hit the upper cage, but it dampens put quickly.
Floyd

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