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 Post subject: Apo on steroids
PostPosted: Mon Sep 06, 2010 7:45 pm 
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I bought a used Antares 8" f/5 Newtonian OTA a couple of months ago and have been working on it whenever I get a chance. I wanted a portable scope mainly for planetary viewing. The optics on it are pretty decent so I have seen no need to have the mirror refigured. I did pull out the terrible GS straight spider and repllace it with a Destiny 3 vane curved spider. This was a huge improvement- the Destiny spiders just keep getting better and better in terms of quality and features. It really does make this newt like an apo on steroids!

Next project is to build a dob mount for the ota, as the SV M1 mount is a hit overloaded with an 8" mounted to it. :)

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-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


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PostPosted: Tue Sep 07, 2010 3:46 am 
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Velocepedist
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Nice project, Erik. I have yet to do the curved spider thing, but have been tempted a number of times. You're making me want to pull my 10" ?4.5 mirror out of the box and start working on that ultra portable dob I've been dreaming of building. :mrgreen:

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 Post subject: Re: Apo on steroids
PostPosted: Mon Dec 13, 2010 2:47 pm 
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Any progress on the 10", Jason?

I still haven't gotten around to finishing the dob mount. I have most of the material- springs, round wood for the base, etc. What I lack is time to do it! :ugeek:

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-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


"Newt Gingrich is what stupid people think smart people sound like."
-The Great Paul Krugman

Evolution is both fact and theory. Creationism is neither. -Anonymous


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 Post subject: Re: Apo on steroids
PostPosted: Tue Dec 14, 2010 7:41 pm 
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Velocepedist
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Location: In search of the ultimate switchbacks and single tracks
Time is definitely the trick. I'm actually holding out a while before I decide what to do. What I'm itching to do is get back out to do more AP. If that part of hobby ever takes off for me, I may turn the 10" into an astrograph. At f4.5 and a 1140mm fl it makes a great candidate for globs and galaxies. Again...time.

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 Post subject: Re: Apo on steroids
PostPosted: Tue Dec 14, 2010 10:18 pm 
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I hear you. Time and priorities. Oh, and work and sleep. All fighting for those 24 hours that make up each short little day.

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-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


"Newt Gingrich is what stupid people think smart people sound like."
-The Great Paul Krugman

Evolution is both fact and theory. Creationism is neither. -Anonymous


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 Post subject: Re: Apo on steroids
PostPosted: Thu Dec 16, 2010 3:39 pm 
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The Blacksmith
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Erik wrote:
Next project is to build a dob mount for the ota, as the SV M1 mount is a hit overloaded with an 8" mounted to it. :)


I'd be tempted to throw it on a semi-sturdy EQ mount. An 8" f/5 makes a pretty short dob. Of course you can design the base to raise it up to a usable height.

The shorter moment of the f/5 tube lends itself to EQ mounting. And If your going to use it for high power planetary use than the tracking would be a nice addition.

Just saying..... :grin:

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 Post subject: Re: Apo on steroids
PostPosted: Sat Dec 18, 2010 4:58 am 
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Location: In search of the ultimate switchbacks and single tracks
Square_peg wrote:
Erik wrote:
Next project is to build a dob mount for the ota, as the SV M1 mount is a hit overloaded with an 8" mounted to it. :)


I'd be tempted to throw it on a semi-sturdy EQ mount. An 8" f/5 makes a pretty short dob. Of course you can design the base to raise it up to a usable height.

The shorter moment of the f/5 tube lends itself to EQ mounting. And If your going to use it for high power planetary use than the tracking would be a nice addition.

Just saying..... :grin:



Planets and tracking go hand in hand, IMO. Well said, Tom. Although, if simplicity is your thing, it might be cool to have a "stubby" portable dob with decent aperture. I think 8" is where deep sky starts to become reasonable.

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“Life is like riding a bicycle. To keep your balance, you must keep moving.” ― Albert Einstein


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 Post subject: Re: Apo on steroids
PostPosted: Sat Dec 18, 2010 10:35 am 
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I may do both. I really want something good on the planets that is portable. My little 80mm is great but it doesn't have enough resolution to show the level of detail that the 8" does. Tracking would be nice but an EQ mount negates some of the portability aspect. Once I get the observatory built, i'd like to have a pier mounted eq for either scope. :cool:

_________________
-Erik Wilcox
Homebuilt 16" Truss Dob
8" Antares f/5 Newt
SV 80mm ED Nighthawk NG on M1 ALT/AZ
Nikon Prostaff 65mm spotter on Trekpod
Konusvue 20x80 binos/Peterson PipeMount


"Newt Gingrich is what stupid people think smart people sound like."
-The Great Paul Krugman

Evolution is both fact and theory. Creationism is neither. -Anonymous


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