DIY Mount

Share practical advice and tips on making your own kit

DIY Mount

Postby hairymunky » Thu Jan 31, 2008 7:06 pm

Thinking of building a mount for my dob. Can't really decide which
is best (and easier) between a fork mount, a dob-wedge, or one
of them equatorial platforms (as I hope do try some imaging, field
rotation would be a problem)

Anyone got any thoughts/tips...???
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RE: DIY Mount

Postby skye at night » Thu Jan 31, 2008 9:36 pm

Hello.
I'l try to help..

if a dob is on a fork or eq then it is no longer really a dob...

What size were you intending?

Big dobs really need a cradle that is built to allow the tube to balance in any position required... partly due to their size and also the fact that they are for observing and dont need a driven mount really, although there are options for the ambitious builder.

They also lend themselves for a standing position (the observerthat is) when in use.. a typical 300mm mirror dob of f6 will be around 5 or 6 feet off the ground at eyepiece on average viewing.. a really big dob can need ladders or an umpires chair to use...

dobs do not lend themselves to long exposure photography.. Lunar is fine and maybe planets if you can keep the planet in frame long enough to capture enough!

Hope I have helped rather than confused,

Steve



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RE: DIY Mount

Postby sftonkin » Thu Jan 31, 2008 10:10 pm

I'd be inclined to go for a split ring equatorial. [url=http://www.saao.ac.za/~wpk/scope/scope.html]This one[/url] made by Willie Koorts has solved all the DIY problems. Willie is one of the world's "good guys" and is very approachable.
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RE: DIY Mount

Postby skye at night » Thu Jan 31, 2008 10:26 pm


[quote]ORIGINAL: sftonkin

I'd be inclined to go for a split ring equatorial. [url=http://www.saao.ac.za/~wpk/scope/scope.html]This one[/url] made by Willie Koorts has solved all the DIY problems. Willie is one of the world's "good guys" and is very approachable.
[/quote]

thats a nice setup.. dobs not my thing, but that brings it into a much more 'manageable' design.. very interesting

good link

Steve

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RE: DIY Mount

Postby bajr » Fri Feb 01, 2008 3:06 pm

Just wondering folks, does this have anything to do with BARN DOORS. what are they exactly, do they work? is it worth attempting , as i cannot afford a tracking mount. Thanks. Brian
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RE: DIY Mount

Postby sftonkin » Fri Feb 01, 2008 5:53 pm


[quote]ORIGINAL: bajr
does this have anything to do with BARN DOORS.[/quote]

Not a lot.

[quote] what are they exactly[/quote]

They are exactly like [url=http://www.astunit.com/tonkinsastro/atm/projects/handscotch.htm]this[/url] and [url=http://www.astunit.com/tonkinsastro/atm/projects/scotch.htm]this[/url].

[quote], do they work?[/quote]

Yes.

[quote] is it worth attempting [/quote]

Yes.

[quote], as i cannot afford a tracking mount.[/quote]

You can now! [:D] -- a couple of short planks, a hinge, a ball-and-socket joint....

sftonkin
 
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RE: DIY Mount

Postby bajr » Fri Feb 01, 2008 6:43 pm

I know what i'll be doing at the weekend now. Thanks. Brian.
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RE: DIY Mount

Postby skye at night » Fri Feb 01, 2008 9:30 pm


[quote]ORIGINAL: sftonkin


[quote]ORIGINAL: bajr
does this have anything to do with BARN DOORS.[/quote]

Not a lot.

[quote] what are they exactly[/quote]

They are exactly like [url=http://www.astunit.com/tonkinsastro/atm/projects/handscotch.htm]this[/url] and [url=http://www.astunit.com/tonkinsastro/atm/projects/scotch.htm]this[/url].

[quote], do they work?[/quote]

Yes.

[quote] is it worth attempting [/quote]

Yes.

[quote], as i cannot afford a tracking mount.[/quote]

You can now! [:D] -- a couple of short planks, a hinge, a ball-and-socket joint....


[/quote]

And something to allow polar allignment!

Steve
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RE: DIY Mount

Postby sftonkin » Sat Feb 02, 2008 12:00 am


[quote]ORIGINAL: skye at night

And something to allow polar allignment!
[/quote]

Incorporated in both [url=http://www.astunit.com/tonkinsastro/atm/projects/handscotch.htm]this[/url] (sighting tube) and [url=http://www.astunit.com/tonkinsastro/atm/projects/scotch.htm]this[/url] (red-dot finder).
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RE: DIY Mount

Postby hairymunky » Sun Feb 03, 2008 1:30 pm

Thanks for the replies guys...

[quote]ORIGINAL: sftonkin

I'd be inclined to go for a split ring equatorial. [url=http://www.saao.ac.za/%7Ewpk/scope/scope.html]This one[/url] made by Willie Koorts has solved all the DIY problems. Willie is one of the world's "good guys" and is very approachable.
[/quote]

Never seen this before, looks like a good setup (and possibly portable, for going
to a dark site)


Cheers
Graham

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