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Explore Scientific 3" 30mm Prototype announced!

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#1 Jim7728

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Posted 12 December 2012 - 01:06 PM

Explore Scientific 3" 30mm Prototype

That is just sick... :bigshock:

#2 csa/montana

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Posted 12 December 2012 - 01:30 PM

Sooo, have you pre-ordered it? :grin:

#3 hottr6

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Posted 12 December 2012 - 01:30 PM

The announcement states that the matching diagonal will be threaded for 2" filters.... doesn't this mean that the 3" EP will be vignetted?

#4 Jim7728

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Posted 12 December 2012 - 01:41 PM

Sooo, have you pre-ordered it? :grin:


Yeeaaahhh...though I should talk after buying a 21mm Ethos
and still saying to myself: "what have I done, what have I done..." :lol:

#5 astro_baby

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Posted 12 December 2012 - 02:20 PM

Wowsa.....

#6 star drop

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Posted 12 December 2012 - 02:22 PM

It should come with a helium purged balloon to offset its weight.

#7 frebie

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Posted 12 December 2012 - 02:25 PM

The announcement states that the matching diagonal will be threaded for 2" filters.... doesn't this mean that the 3" EP will be vignetted?


Scott did some prototype testing in the ES 80mm apo (480mm focal length) with the prototype 2" to 3" diagonal and did not see any vignetting of the 6.25 degree field of view.

#8 Scanning4Comets

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Posted 12 December 2012 - 03:30 PM

@ 7.5 LBs, nooooooooooooo thanks!

#9 stevetaylor199

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Posted 12 December 2012 - 03:48 PM

It should come with a helium purged balloon to offset its weight.


And here I was going to suggest that for $1200, the eyepiece should be purged with something more exotic than plain old argon, like krypton.

Silly me -- krypton's too heavy! :foreheadslap:

Now, neon, on the other hand.... :question:

#10 bherv

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Posted 12 December 2012 - 05:33 PM

We will need 3" focusers for our reflectors, and lots of counterweight.
Barry

#11 stratocaster

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Posted 12 December 2012 - 06:00 PM

I was wondering what the target market would be for such a beast.

The only thing that makes sense to me would be for large dobs or SCTs with long focal lengths, as it would be a way to increase the tfov for these scopes. Even so, say for a 2000mm f/l scope the increase in tfov is only .25 degrees over a 30mm 82 degree eyepiece - for around three times the weight of a 30mm 82 and the additional weight of a special diagonal.

And I suspect coma would be problem in the dob. So maybe SCTs are really the only market.

I'm thinking FC would be way too apparent for use in a refractor. Could be wrong, though.

I guess I don't get it.

#12 Achernar

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Posted 12 December 2012 - 09:41 PM

Wow, drop that eyepiece on your foot, and YOU will be going to the emergency room :bigshock: I can't imagine this eyepiece being used on most telescopes simply because of the weight. However, I could see universities and professional observatories buying them for public outreach events.

Taras

#13 Gord

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Posted 12 December 2012 - 09:44 PM

I can see use in long FL refractors. Would be nice in a 6" f15 or 8" f12/15. The big cats as well. I'm wondering if we could see some 82 or 68 deg options in long focal lengths? But again, really for the big cat/refractor crowd.

Clear skies,

#14 johnnyha

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Posted 12 December 2012 - 09:46 PM

The announcement states that the matching diagonal will be threaded for 2" filters.... doesn't this mean that the 3" EP will be vignetted?

To me too, this seems to negate the whole thing. Why not make 3" filters? Or why even the need to go beyond 2" if the 2" filter somehow magically works with the 3" eyepiece? :question:

#15 Dr Morbius

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Posted 12 December 2012 - 11:10 PM

Great Caeser's Ghost - that is huge!

#16 jrbarnett

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Posted 12 December 2012 - 11:13 PM

Yeah, it'll be here right after the 5.5mm and 25mm 100s. :grin:

I'm officially announcing a new, hand-ground 4" 140-degree 37mm eyepiece. Pricing will be $5000 per unit. It will be purged with Californium gas and have 18 elements.

Coming soon...

:foreheadslap:

- Jim

#17 JayinUT

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Posted 13 December 2012 - 01:08 AM

Just think, if you put attachments on them you could use them as barbells in the field during the day to work out with. I'll envy on these. Too rich for me.

#18 Chucky

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Posted 13 December 2012 - 07:10 AM

Every company needs a product that gets talked about big time to increase company visibility and awareness. All the talk and discussion helps generate sales to other lines. Smart marketing.

#19 faackanders2

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Posted 13 December 2012 - 10:04 AM

Yeah, it'll be here right after the 5.5mm and 25mm 100s. :grin:

I'm officially announcing a new, hand-ground 4" 140-degree 37mm eyepiece. Pricing will be $5000 per unit. It will be purged with Californium gas and have 18 elements.

Coming soon...

:foreheadslap:

- Jim


I believe that one would have to be filled with unobtainium.

#20 Dave Ittner

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Posted 13 December 2012 - 10:49 AM

I believe that one would have to be filled with unobtainium.


lol, good one. we'd only have to build a ship and travel to Pandora. no biggie.

http://james-cameron...wiki/Unobtanium

#21 Dick Jacobson

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Posted 13 December 2012 - 01:58 PM

I believe that one would have to be filled with unobtainium.

No, it will be filled with Upsidaisium to make it weightless (apologies to Rocky and Bullwinkle).

#22 MRNUTTY

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Posted 13 December 2012 - 06:04 PM

I believe that one would have to be filled with unobtainium.

No, it will be filled with Upsidaisium to make it weightless (apologies to Rocky and Bullwinkle).


Moose and squirrel!

#23 Shneor

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Posted 15 December 2012 - 07:24 PM

Helium-filled to reduce weight...not that it would help a whole lot.

Clears,

#24 faackanders2

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Posted 15 December 2012 - 07:56 PM


Quote:

Make the widest TFOV 3" eyepiece possible for 100 AFOV and 82 AFOV and 70 AFOV, to take full advantage of 3". I don't feel I would ever be able to afford a 120 AFOV max TFOV.

P.S. These may be the eyepieces people will build telescope around (3" refractors, 3" reflectors, and 3" SCTs).



Anybody know what would be the theoretical widest TFOV eyepiece focal length for a 3" diameter 70 AFOV, 82 AFOV, 100 AFOV, and 120 AFOV eyepiece? Also what would be their exit pupils?

#25 bremms

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Posted 15 December 2012 - 09:36 PM

Good lord when will the EWF eyepiece madness end? $1200 for an eyepiece.. If TV made it it would be $2500. Make it and they will come.....
how about a 50mm 110 degree 4 inch for $10,000... why not.






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