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Midnight Dan
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Reged: 01/23/08

Loc: Hilton, NY, Yellow Zone (Bortl...
2" Diagonal and wide eyepiece - great deal!
      #5642035 - 01/25/13 07:38 AM

I know there have been some people here recently thinking about upgrading to a 2" diagonal to allow them to use the wider view EPs. Here's a deal from Meade as one of it's new weekly deals. A 2" dielectric diagonal, and a 24mm 82 AFOV eyepiece for $159! That's pretty much the price of a diagonal with the EP thrown in for free! The diagonal has adapters so it can be used for a refractor or an SCT.

http://store.meade.com/weeklydeals

-Dan


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Tim J K
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Reged: 05/19/09

Loc: Iowa
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: Midnight Dan]
      #5642221 - 01/25/13 09:48 AM

Thanks for the heads-up Dan. Looks like a great deal!

Tim


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mitaccio
professor emeritus
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Reged: 03/17/09

Loc: Oahu, Hawaii
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: Midnight Dan]
      #5642226 - 01/25/13 09:53 AM

Thanks Midnight Dan. I couldn't pass the chance to save $200 over getting a WO 2" and an ES 82* 24mm!

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belgrade
sage


Reged: 10/05/07

Loc: Frisco, TX
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: mitaccio]
      #5642247 - 01/25/13 10:03 AM

They will sell 'em like hotcakes...

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paolotto
member


Reged: 01/17/12

Loc: Albany, CA USA
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: belgrade]
      #5645332 - 01/27/13 12:37 AM

Very tempting indeed... two questions, though, for all the wise men and women who read this:

- Would I need a different visual back than the stock one for my 8Se?

- Would I get the full 82 degree field of view, or would it get "cropped" on an 8se (I heard this would happen with large-FOV 2" eyepieces on 6SE or smaller-aperture scopes).

Thanks!


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Peter9
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Reged: 10/30/08

Loc: Yorkshire - Born & Bred
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: paolotto]
      #5645573 - 01/27/13 07:50 AM

Hi Paolotto,

In answer to your first question, if the diagonal is a SCT type, as against the "push in" type, then the visual back can be removed and the diagonal screwed on in its place.

I will leave your second question to the lads who do the maths on these things.

Regards. Peter.


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hopskipson
Pooh-Bah


Reged: 06/24/10

Loc: Queens, New Yawk, Light pollut...
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: Peter9]
      #5645611 - 01/27/13 08:39 AM

Hi Paolotto

I own the 24mm 82* Explore scientific EP and have not experienced any vignetting. I don't own the 6SE so I can't comment on its use.


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Arctic_Eddie
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Reged: 12/30/07

Loc: St. Petersburg, FL
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: hopskipson]
      #5645699 - 01/27/13 09:52 AM

A 24mm-82 on the 6SE with 2" hardware will produce a FOV of c.a. 1.16. This is safely below the measured upper limit of 1.32 using 68 EPs. The 6SE with 2" hardware has an apparent FL of about 1700mm.

http://www.cloudynights.com/ubbthreads/showflat.php/Cat/0/Number/3619392/page...


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paolotto
member


Reged: 01/17/12

Loc: Albany, CA USA
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: Arctic_Eddie]
      #5645857 - 01/27/13 11:19 AM

OK, thanks guys. So If I have this straight, the Meade diagonal looks like a "push-in" type, but it says it has an SC adapter, so I should be able to use it without the visual back. And probably without wasting too much if any back-of-scope clearance, since I'm gaining and adapter but losing a visual back. Can anyone (possibly someone who has one or knows this diagonal) confirm this?

Thanks again, I'm still more of a newbie than I should be after 15 months with my beloved 8se


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Arctic_Eddie
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Reged: 12/30/07

Loc: St. Petersburg, FL
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: paolotto]
      #5645960 - 01/27/13 12:24 PM

The photo is not clear as to whether the SCT adapter replaces the diagonal snout or adds to it. If the later, the adapter is just a 2" visual back. It would likely accumulate too much length and interfere at zenith, even with one of the rail adapters.

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Midnight Dan
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Reged: 01/23/08

Loc: Hilton, NY, Yellow Zone (Bortl...
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: Arctic_Eddie]
      #5646069 - 01/27/13 01:25 PM

The adapter is the piece in the rear of the photo behind the other items. It's unclear as to how it attaches to the diagonal, but it does seem to be longer than most SCT-diagonal connectors so you will probably have interference at zenith with the stock setup on an 8SE.

But adding a "Ron's Rail" extension is easy to do and will allow your 8SE to use this diagonal in addition to many other large accessories that won't work on a stock 8SE.

-Dan


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paolotto
member


Reged: 01/17/12

Loc: Albany, CA USA
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: Midnight Dan]
      #5646165 - 01/27/13 02:29 PM

Thanks, Eddie and Dan. Based on some googling it sounds like it would add to the snout (there's a Meade 07085 universal 2" adapter that adds extra length, so it's probably similar). I've considered doing a Ron's Rail but for now I want to keep the scope as slim and portable as I can (and still fit it into my Beato bag).
So I think I'll keep my ears up for a good deal on a screw-on 2" diagonal I can use directly without a visual back or adapter. Does anyone have a recommendation for a reasonably affordable one?


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Midnight Dan
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Reged: 01/23/08

Loc: Hilton, NY, Yellow Zone (Bortl...
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: paolotto]
      #5646192 - 01/27/13 02:45 PM

This is probably the least expensive option in a dielectric coated 2" diagonal. You want to be sure to get dielectric coatings because they are very hard and resist scratching from repeated cleanings.

Probably the best deal is on the GSO from Agena astro. Keep in mind that Agena includes shipping in the $100 price: http://agenaastro.com/gso-2-90-99-dielectric-sct-mirror-diagonal.html

-Dan


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Madratter
Postmaster


Reged: 01/14/13

Re: 2" Diagonal and wide eyepiece - great deal! new [Re: Midnight Dan]
      #5646307 - 01/27/13 03:59 PM

Wish I had waited. I just recently got the diagonal. I will say I have been very happy with it. It would have been interesting comparing the UWA with my Tele Vue 24mm Widefield. That is one of my favorite eyepieces.

Effectively, the eyepiece would have cost me only 20$,

Edited by Madratter (01/27/13 04:00 PM)


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Arctic_Eddie
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Reged: 12/30/07

Loc: St. Petersburg, FL
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: Madratter]
      #5646449 - 01/27/13 05:00 PM

Look at the accessories tab on that page just under the photo and you'll see an adapter(left side) for use on a refractor. The SCT snout unscrews and the other goes in it's place. That's a better way of designing the diagonal.

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Widespread
professor emeritus


Reged: 05/11/11

Loc: Bowling Green, Kentucky
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: Arctic_Eddie]
      #5651920 - 01/30/13 09:49 AM

That's a great deal! Of course, I just bought a new 2" diagonal from Stellarvue to go with my new scope.

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Chuck Hastorf
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Reged: 11/20/12

Loc: AZ, USA
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: Midnight Dan]
      #5652001 - 01/30/13 10:36 AM

Wow! I'm going loopy. I've read conflicting statements about 2" diagonals and UWA eyepieces. Has any member used an 82 degree on a Nexstar 6SE successfully?

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mitaccio
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Reged: 03/17/09

Loc: Oahu, Hawaii
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: Chuck Hastorf]
      #5654956 - 01/31/13 07:52 PM Attachment (17 downloads)

This is so much bigger than I expected. Makes my 8SE look like a 6SE! Everything looks fine, no sign of blemishes or seconds.

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hopskipson
Pooh-Bah


Reged: 06/24/10

Loc: Queens, New Yawk, Light pollut...
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: mitaccio]
      #5654983 - 01/31/13 08:12 PM

Looking gooood mitaccio! How is the clearence at zenith?

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mitaccio
professor emeritus
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Reged: 03/17/09

Loc: Oahu, Hawaii
Re: 2" Diagonal and wide eyepiece - great deal! new [Re: hopskipson]
      #5655100 - 01/31/13 09:18 PM Attachment (12 downloads)

It touches at around 90-92 degrees. But this is with the rail all the way forward. I have balance issues that will require the Ron's rail.

There isn't any flex in the eyepiece, It's just the angle I took the picture.


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