8" Antares has arrived!

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Erik
Post subject: 8" Antares has arrived!
Posted: Sat Jul 10, 2010 10:01 am
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It only took the US Post Office just over a month to ship the scope from Illinois to Hawaii- I guess it was on the fast boat. :lol:

I worked out a trade for this scope with a CNer. It was well packed and arrived in good shape. I installed the focuser (which had been removed for shipping) and the finder. I noticed that the mirror wasn't center-spotted so I removed it and did that. I collimated it and took it outside just after dark last night.

I mounted it to my Stellarvue M1 mount which is way too small for this scope but it worked. The f/5 optics showed some coma so I tried the Paracorr I had on my 16" but many of my ep's wouldn't reach focus. The scope comes with an extension tube and I had to keep removing it and reinstaling it with different ep's in order to reach focus.

I was very disappointed with the dual speed Crayford focuser. It's probably the worst crayford I've ever used- I hope it just breeds adjusting. It's very "jumpy", no matter how I adjust the stiffness screw. I'll definitely have to address the focuser.

Optically, the scope performed well. A star test on Antares, which was well up in the Southern sky revealed a nice pattern in and outside of focus, and a Ronchi test showed crisp, straight lines.

I viewed quite a few Southern sky objects and the scope was noticeably brighter than my SV 80ED (but of course not nearly as bright as my 16").

Overall, I'm impressed with the scope except for the focuser. I'm going to build a mount for it and replace the straight spider with a Destiny curved spider. So there's some work to be done.

I'll try and post pics soon...

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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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snorkler
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Posted: Sat Jul 10, 2010 9:46 pm
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Imagine that. An 8" outperforms an 80 mm, and isn't as bright as a 16" :twisted:. That's interesting about the focuser.

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Erik
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Posted: Sun Jul 11, 2010 10:55 am
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:lol:
Yes, I suppose that's to be expected.

When I was using the 8" I couldn't help think how much I enjoy the little 80mm. The 8" is brighter, but where it really beats it is in resolution. M57 for example showed much more detail than through the small refractor. Again, to be expected.

I mainly wanted the 8" as an "in-betweener" scope. I'm hoping it's as good on planets as the 8" f/6 Orion I used to have with a 1/14th wave mirror. :)

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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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Erik
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Posted: Wed Jul 14, 2010 10:29 pm
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A couple of pics:
[ img ]

_________________

-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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Erik
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Posted: Wed Jul 14, 2010 10:30 pm
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Un-centerspotted mirror. This was a bit of a surprise...
[ img ]

_________________

-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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Erik
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Posted: Wed Jul 14, 2010 10:31 pm
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I created a templet and carefully installed an Avery notebook hole reinforcer, which I've found to make excellent collimation spots! :cool:
[ img ]

_________________

-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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Chopin
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Posted: Thu Jul 15, 2010 5:31 am
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Cool scope. I sometimes wish I had opted for an 8" instead of a 12". I good practical size for just about everything. And full agreement regarding the Avery circles. They were made for this use, IMO. :lol:

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Erik
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Posted: Thu Jul 15, 2010 9:49 am
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Thanks Jason. Yeah, I really miss the Orion 8" I used to have. I'm hoping the Antares performs as well. Some of the best views of Saturn I ever had were through the 8" f/6. The 16" blows it away in just about every area, but the 8" was nearly as good on planets.

With this scope, I like the shorter f/ratio for portability. I wanted to buy the new Orion f/4 astrograph but that mightve been too fast for planetary viewing.

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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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Chopin
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Posted: Thu Jul 15, 2010 11:04 am
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Speaking of Orion astrographs, that 7" Mak-Newt constantly teases me when I visit the site. If only there was a way to get that Mak-Newt performance, without the long cool down times...oh wait, I forgot about Apos. :lol: Too bad I could never conceivably afford a 7" Apo. At least not for another 20-30 years... :mrgreen:

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Jason® (Admin...and spoke-folk)
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Single ride personal records: Distance-76.7miles, Max Speed-50.4mph, Max sustained speed (20miles) 19.5mph
“Life is like riding a bicycle. To keep your balance, you must keep moving.” ― Albert Einstein


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Erik
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Posted: Thu Jul 15, 2010 10:25 pm
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Yikes, a 7" apo- I don't think we could afford one of those if all of us on SS pooled our money together. :lol:

But yeah, an AP 7" apo- that'd be something... :cool:

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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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Chopin
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Posted: Fri Jul 16, 2010 3:37 am
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Indeed. Of course a well tuned newt is nearly as good, so I think you will be enjoying that scope for some time to come.

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Jason® (Admin...and spoke-folk)
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Veritable Imagery
Single ride personal records: Distance-76.7miles, Max Speed-50.4mph, Max sustained speed (20miles) 19.5mph
“Life is like riding a bicycle. To keep your balance, you must keep moving.” ― Albert Einstein


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snorkler
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Posted: Fri Jul 16, 2010 8:04 am
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We had a lineup of scopes at Lake Sonoma to see NASA's Deep Impact experiment, firing a missile into a comet. The scopes ranged from an 6" AP refractor to a 14" SCT and an 18" Dob. My buddy and I were sharing his 12.5" Portaball, and a guy with a 10" pipe-rack-mounted reflector was on one side and the 6" AP refractor was on the other side. The 6" AP gave the worst views of all the scopes we looked through, and we looked through all the scopes mentioned. As expected, the 18" Dob gave the best views.

_________________

Ah, but I was so much older then.
I'm younger than that now
Bob Dylan

[ img ]
49.6 mpg avg over 38,000 miles. 177% of '08 EPA
Best flat drive 94.5 mpg for 9.8 mi
Best tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg


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Erik
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Posted: Fri Jul 16, 2010 9:51 am
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I completely agree- aperture wins, as long as the optics are good.

But AP apos sure are pretty to look at, even if they're not as good to look through.

_________________

-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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Chopin
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Posted: Fri Jul 16, 2010 11:45 am
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You're talking faint fuzzies. Unless the seeing is Pickering-10, big newts peter out on planets. I've just become more of a planet observer over the years, which is why I keep toying around with selling my 12" Dob. As is my 114mm newt is useful in all but the worst seeing. Now if I lived in florida, an ultra lite 18" Obsession with motor drive would definitely take the cake. Laminar air all year long.

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Jason® (Admin...and spoke-folk)
[ img ]
[ img ]
[ img ]
[ img ]
Veritable Imagery
Single ride personal records: Distance-76.7miles, Max Speed-50.4mph, Max sustained speed (20miles) 19.5mph
“Life is like riding a bicycle. To keep your balance, you must keep moving.” ― Albert Einstein


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Erik
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Posted: Sat Jul 17, 2010 2:02 pm
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I don't agree with that, Jason. A well figured newt beats an apo of lesser aperture even in the planets, IMO. I've never seen otherwise but I haven't looked through every apo refractor! :)

The Destiny curved spider for the 8" Antares arrived today- this is going to be a fun project 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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