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Equipment Discussions >> Eyepieces

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Dick Jacobson
scholastic sledgehammer


Reged: 12/22/06

Loc: Plymouth, Minnesota, USA
Re: Explore Scientific 3" 30mm Prototype announced! new [Re: faackanders2]
      #5569327 - 12/13/12 01:58 PM

Quote:

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).


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MRNUTTY
Carpal Tunnel
*****

Reged: 11/22/11

Loc: Mendon, MA
Re: Explore Scientific 3" 30mm Prototype announced! [Re: Dick Jacobson]
      #5569677 - 12/13/12 06:04 PM

Quote:

Quote:

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!


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Shneor
scholastic sledgehammer
*****

Reged: 03/01/05

Loc: Northern California
Re: Explore Scientific 3" 30mm Prototype announced! new [Re: Dick Jacobson]
      #5573046 - 12/15/12 07:24 PM

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

Clears,


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faackanders2
Carpal Tunnel


Reged: 03/28/11

Re: Explore Scientific 3" 30mm Prototype announced! new [Re: Shneor]
      #5573090 - 12/15/12 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?


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bremms
Carpal Tunnel
*****

Reged: 08/31/12

Loc: SC
Re: Explore Scientific 3" 30mm Prototype announced! new [Re: faackanders2]
      #5573273 - 12/15/12 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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MikeBOKC
Post Laureate
*****

Reged: 05/10/10

Loc: Oklahoma City, OK
Re: Explore Scientific 3" 30mm Prototype announced! new [Re: bremms]
      #5573325 - 12/15/12 10:18 PM

I want a 360 degree eyepiece so I can see if anyone is sneaking up behind me.

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faackanders2
Carpal Tunnel


Reged: 03/28/11

Re: Explore Scientific 3" 30mm Prototype announced! new [Re: MikeBOKC]
      #5658831 - 02/02/13 08:06 PM

Has anyone looked through the prototype with a 3" focuser?
How much wider was the TFOV compared to 2"? What type scope dis they look through. I believe some said it may be best for 3" focusers on a refractor.

Will it be at NEAF?


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Scanning4Comets
Markus
*****

Reged: 12/26/04

Re: Explore Scientific 3" 30mm Prototype announced! new [Re: faackanders2]
      #5658995 - 02/02/13 10:06 PM

Quote:

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.




There's a sucker born every minute.


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pbsastro
professor emeritus
*****

Reged: 03/21/07

Re: Explore Scientific 3" 30mm Prototype announced! new [Re: Scanning4Comets]
      #5660052 - 02/03/13 02:06 PM

Quote:

Quote:

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.




There's a sucker born every minute.




I think a reasonable single eyepiece price is up to about 25% of the OTA price. So a $1k eyepiece in a $4k OTA, or a $10k eyepiece in a $40k OTA seems reasonable to me.


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Astrojensen
Post Laureate
*****

Reged: 10/05/08

Loc: Bornholm, Denmark
Re: Explore Scientific 3" 30mm Prototype announced! new [Re: pbsastro]
      #5660145 - 02/03/13 02:55 PM

Quote:

I think a reasonable single eyepiece price is up to about 25% of the OTA price. So a $1k eyepiece in a $4k OTA, or a $10k eyepiece in a $40k OTA seems reasonable to me.




What if someone gave you the telescope?

Or you found a really nice scope in a used ad, for a really low price?


Clear skies!
Thomas, Denmark


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Jon Isaacs
Postmaster
*****

Reged: 06/16/04

Loc: San Diego and Boulevard, CA
Re: Explore Scientific 3" 30mm Prototype announced! new [Re: Astrojensen]
      #5660582 - 02/03/13 07:02 PM

Quote:

Quote:

I think a reasonable single eyepiece price is up to about 25% of the OTA price. So a $1k eyepiece in a $4k OTA, or a $10k eyepiece in a $40k OTA seems reasonable to me.




What if someone gave you the telescope?

Or you found a really nice scope in a used ad, for a really low price?


Clear skies!
Thomas, Denmark




When there is a 3 inch coma corrector available or if I owned a TAK 106 FSQ and it would come to focus with a 3 inch diagonal (assuming one were available), this might be awesome. The FSQ has a focal length of 530mm so you'd get a 5.6 degree TFoV.

Otherwise...

Jon


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Scanning4Comets
Markus
*****

Reged: 12/26/04

Re: Explore Scientific 3" 30mm Prototype announced! new [Re: Jon Isaacs]
      #5660593 - 02/03/13 07:11 PM

Quote:

I think a reasonable single eyepiece price is up to about 25% of the OTA price. So a $1k eyepiece in a $4k OTA, or a $10k eyepiece in a $40k OTA seems reasonable to me.




This doesn't make any sense. This still leaves this ridiculously expensive eyepiece out, unless you're Joe Cash.


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Happy Birthday Achernar
Postmaster
*****

Reged: 02/25/06

Loc: Mobile, Alabama, USA
Re: Explore Scientific 3" 30mm Prototype announced! new [Re: Jim7728]
      #5660625 - 02/03/13 07:44 PM

Good lord, drop that eyepiece on your foot and you will be seeing stars, all the way to the emergency room. I'm sure the views are tremendous through it, if the 30mm ES 82 degree eyepiece I tried out last night was any guide anyone looking through one of those will not be able to see the whole FOV without moving their eye around.

Taras


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pbsastro
professor emeritus
*****

Reged: 03/21/07

Re: Explore Scientific 3" 30mm Prototype announced! new [Re: Scanning4Comets]
      #5660637 - 02/03/13 07:55 PM

Quote:

Quote:

I think a reasonable single eyepiece price is up to about 25% of the OTA price. So a $1k eyepiece in a $4k OTA, or a $10k eyepiece in a $40k OTA seems reasonable to me.




This doesn't make any sense. This still leaves this ridiculously expensive eyepiece out, unless you're Joe Cash.




??????
It is the same Joe Cash that payed 4x for the OTA. Not counting mount, tripod, etc.
It is the same thing that saying that $5k for some car tires is too expensive. It sure is for a $20k car, but sure is not for a $200k car.
What makes no sense to me is that you see no sense in this.


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northernontario
Pooh-Bah
*****

Reged: 07/01/09

Loc: Porcupine, Ontario Canada
Re: Explore Scientific 3" 30mm Prototype announced! new [Re: pbsastro]
      #5660654 - 02/03/13 08:09 PM

Oh those silly egg heads in the research department....what will they think of next.

jake


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pbsastro
professor emeritus
*****

Reged: 03/21/07

Re: Explore Scientific 3" 30mm Prototype announced! new [Re: northernontario]
      #5660663 - 02/03/13 08:18 PM

Quote:

Oh those silly egg heads in the research department....what will they think of next.

jake




It is not a research department thing.
This eyepiece has been requested by many for a long time, including me. TV refused to do it. ES is doing it for us. Long live ES!


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pbsastro
professor emeritus
*****

Reged: 03/21/07

Re: Explore Scientific 3" 30mm Prototype announced! new [Re: Achernar]
      #5660669 - 02/03/13 08:23 PM

Quote:

anyone looking through one of those will not be able to see the whole FOV without moving their eye around.





Why would it be different from other 100 deg eyepieces?
BTW Markus Ludes looked through it and thought it was excellent, and will be first in line to buy one.


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Pollux556
Pooh-Bah
*****

Reged: 12/14/08

Re: Explore Scientific 3" 30mm Prototype announced! new [Re: pbsastro]
      #5660813 - 02/03/13 10:09 PM

Quote:


Why would it be different from other 100 deg eyepieces?





30mm !!!

Edited by Pollux556 (02/03/13 10:10 PM)


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Scanning4Comets
Markus
*****

Reged: 12/26/04

Re: Explore Scientific 3" 30mm Prototype announced! new [Re: Pollux556]
      #5660826 - 02/03/13 10:22 PM

Quote:

??????
It is the same Joe Cash that payed 4x for the OTA. Not counting mount, tripod, etc.
It is the same thing that saying that $5k for some car tires is too expensive. It sure is for a $20k car, but sure is not for a $200k car.
What makes no sense to me is that you see no sense in this.




You could have posted what you did in one post, not three. You angry? lol. It's a hobby, calm down.


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Happy Birthday Achernar
Postmaster
*****

Reged: 02/25/06

Loc: Mobile, Alabama, USA
Re: Explore Scientific 3" 30mm Prototype announced! new [Re: pbsastro]
      #5661310 - 02/04/13 09:00 AM

I've looked through several 100 degree eyepieces, which are more like looking though a spacesuit's visor than peering into an eyepiece. The field of view is too large to see all at one glance, almost like an IMAX theater. That is especially spectacular when cruising the Milky Way.

Taras


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