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ZachK
professor emeritus
Reged: 08/21/05
Posts: 709
Loc: Israel
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I can imagine a 30" f 2.5, I just can't quite imagine being able to afford it. 
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Zach Kessin
Ariel Israel
Meade ETX 127 Mak-Cass
15x70 Celestron Skymaster Binoculars
Sinar F 4x5 view camera
Rolliflex Camera 80mm F2.8
Pentax K-1000 Camera 35,50 and 60--300mm zoom
4 kids
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kfrederick
professor emeritus
Reged: 02/01/08
Posts: 653
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harder mirrors to make= more $$ .Special eyepieces MORE $$ [you afraid to have your feet only 3 ft off the ground]Congrads to MIKE succeeding in making the fast mirrors.
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gnowellsct
professor emeritus
Reged: 06/24/09
Posts: 729
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Quote:
Thats a unique, and nice scope, but I would think there would be some optical drawbacks besides disaterous coma, without the new paracor
Sooner or later, everyone ends up with a corrector plate GN
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"Aperture will get you through times of no money better than money will get you through times of no aperture."
featuring selected astrojunk:
bunch o' widefield eyepieces
bunch o' narrowfield eyepieces
couple o' Barlows
couple o' scopes
couple o' mounts
couple o' tripods
and a pier 'n' stuff
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gnowellsct
professor emeritus
Reged: 06/24/09
Posts: 729
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Quote:
I think the central obstruction is about 30% which isn't too bad...
I hope the designer (in photo) doesn't mind my posting this.
Dave
I think if you measured the secondary support vanes and calculated their area you'd end up with more than 30% central obstruction.
And that assumes that the vanes are exactly parallel to incoming light. If they are a little bit canted there will be more.
Some sct users after getting MANY lectures about central obstruction will find it ironic that the C.O. is all of a sudden OK when it is on a super-fast Newtonian. Anyhow I betcha it's a real good scope so thanks for writing about it.
Greg N
--------------------
"Aperture will get you through times of no money better than money will get you through times of no aperture."
featuring selected astrojunk:
bunch o' widefield eyepieces
bunch o' narrowfield eyepieces
couple o' Barlows
couple o' scopes
couple o' mounts
couple o' tripods
and a pier 'n' stuff
|
ZachK
professor emeritus
Reged: 08/21/05
Posts: 709
Loc: Israel
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|
Quote:
harder mirrors to make= more $$ .Special eyepieces MORE $$ [you afraid to have your feet only 3 ft off the ground]Congrads to MIKE succeeding in making the fast mirrors.
Oh I'm sure the price is fair, Its just more than I can afford. But then right now even a 12" dob would be outside my price range. Right now I'm also carless so I am a small scope kind of guy. I am trying to assemble an entire setup that I can take to dark skies by bus!
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Zach Kessin
Ariel Israel
Meade ETX 127 Mak-Cass
15x70 Celestron Skymaster Binoculars
Sinar F 4x5 view camera
Rolliflex Camera 80mm F2.8
Pentax K-1000 Camera 35,50 and 60--300mm zoom
4 kids
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