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I'd love a 36" Fullum "Techno-Fusion" sandwich!

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#1 smallscopefanLeo

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Posted 06 March 2013 - 04:26 AM

There is one on A-mart now, 25k. Just amazing the technology that is available for amateurs to wield nowadays.:bigshock:

Could anyone 50-60 years ago ever imagine these sorts of mirrors being available commercially? Or 30-40 years ago? Just mind boggling!

If I was to win the lotto, I would immediately make the call to give them a heads up that I would soon be putting money down on a meter-plus sized one, and start planning a home built around a massive observatory centerpiece with a special computerized balcony/catwalk that tracks together with the scope, raising alongside and revolving around it, before even purchasing any land yet:grin: (I would also have a dedicated wing with a Zeiss planetarium, of course!)... hey, it's free to dream!

#2 nirvanix

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Posted 06 March 2013 - 07:09 AM

But your forum username is smallscopefan??? :p

I'm sure I'll do the same thing when I win the lottery.

I've already got the land.

#3 smallscopefanLeo

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Posted 06 March 2013 - 10:20 AM

But your forum username is smallscopefan??? :p

I'm sure I'll do the same thing when I win the lottery.

I've already got the land.


Oh I may observe small, but I sure do dream big :grin:

(and hey, let us not think for a microsec that I won't be adding Telementors, Questars, Teleports (and 5" D&G and Portaballs and ..) to my collection as well, should riches be struck! :jump:)

#4 cjc

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Posted 06 March 2013 - 12:24 PM

No what you really need is one of these!

#5 Pinbout

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Posted 06 March 2013 - 12:39 PM

and at 120lbs for a 1:6 ratio... :bigshock:

36 blank at NEAF

if you like it, give it a thumbs up... :grin:

#6 careysub

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Posted 06 March 2013 - 02:16 PM

The Extremely Large Telescope?

Bah, a mere piker.

There is already a proposal for OLT: The Overwhelmingly Large Telescope:
http://en.wikipedia....Large_Telescope

The logical next step must be ILT: The Insanely Large Telescope.

#7 Starman1

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Posted 06 March 2013 - 06:22 PM

That scope has a projected focal length of 175,000mm.
Let's see, that yields a true field, using a 56mm Plossl, of 0.9 arc-minute.
And a magnification of 3125X
Nope, not workable.
Now a 10" diameter eyepiece of 500mm focal length yields a true field of 4.9' and a magnification of 350X
Nope, that doesn't work either.
How about a 20" diameter eyepiece of 1000mm focal length?
175X with a true field of 9.8'
Still a no go.

Face it, some telescopes would just be too big, no matter how much aperture fever you have.

#8 steveyo

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Posted 06 March 2013 - 06:28 PM

I'm pretty sure those scope just mentioned would require you to win several lotteries, not just one.

#9 Sgt

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Posted 06 March 2013 - 06:46 PM

The OWL went the same was as the 50inch Orion/Fullum dobs. In other words, you don't need to win any lotteries!

#10 careysub

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Posted 07 March 2013 - 05:46 PM

This raises the interesting question of what the size limits for a usable visual scope are. Care to offer a judgment?

#11 Dick Jacobson

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Posted 08 March 2013 - 08:52 AM

Now a 10" diameter eyepiece of 500mm focal length yields a true field of 4.9' and a magnification of 350X
Nope, that doesn't work either.
How about a 20" diameter eyepiece of 1000mm focal length?
175X with a true field of 9.8'
Still a no go.

But you could look into the eyepieces with both eyes. Maybe two people could share the view.

#12 Dick Jacobson

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Posted 08 March 2013 - 09:00 AM

This raises the interesting question of what the size limits for a usable visual scope are. Care to offer a judgment?

I think the Mike Clements 70" reflector has hit the limit (see 70" scope). For my 5 mm pupils, the lowest magnification that would capture all the light is about 350x. The highest magnification that I usually use, given the limitations imposed by the atmosphere, is...350x. So I would only need one eyepiece if I had that scope!






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