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Main
Date: 07 Dec 2006 04:08:41
From: John McVey
Subject: Best widefield eyepiece for 16" f/4.5 dob???
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Hi all,
It's been a long time since I've posted here.
Anyway, what eyepiece would you recommend for use in a 16" f/4.5 dob? I'm
considering this list, but I'd rather not spend the $300 a Pan 35mm will
cost me.
Antares Erfles (but which one?)
Vixen LVW 42mm (has to be 2nd-hand to meet my price point)
Stratus 30mm
Stratus 35mm
Meade QX 30mm
Meade QX 36mm
TMB Paragon 40mm (a stretch at $249)
SWAN ??
UWAN ?? (too costly)
Televue Panoptic 35mm (again, too costly I think)
I'd like to have decent stars to nearly the edge, where I'm mostly affected
by coma inherent in my mirror. Perhaps at that point I'd buy a coma
corrector to go with this eyepiece.
Thanks for your opinions.
John
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Date: 06 Dec 2006 23:53:07
From: Joe S.
Subject: Re: Best widefield eyepiece for 16" f/4.5 dob???
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"John McVey" <Askme > wrote in message
news:Xns9891D70FA1452jrmcveycableonenet@216.168.3.44...
> Hi all,
>
> It's been a long time since I've posted here.
>
> Anyway, what eyepiece would you recommend for use in a 16" f/4.5 dob? I'm
> considering this list, but I'd rather not spend the $300 a Pan 35mm will
> cost me.
>
> Antares Erfles (but which one?)
> Vixen LVW 42mm (has to be 2nd-hand to meet my price point)
> Stratus 30mm
> Stratus 35mm
> Meade QX 30mm
> Meade QX 36mm
> TMB Paragon 40mm (a stretch at $249)
> SWAN ??
> UWAN ?? (too costly)
> Televue Panoptic 35mm (again, too costly I think)
>
> I'd like to have decent stars to nearly the edge, where I'm mostly
> affected
> by coma inherent in my mirror. Perhaps at that point I'd buy a coma
> corrector to go with this eyepiece.
>
> Thanks for your opinions.
>
> John
>
I am trying to buy a Stratus 35mm for my 12-inch f/4.9 Dob -- it's listed in
the Orion catalog but not on their website. Sent a e-mail to them to see if
it's still available.
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Date: 06 Dec 2006 21:21:13
From: Shawn
Subject: Re: Best widefield eyepiece for 16" f/4.5 dob???
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John McVey wrote:
> Hi all,
>
> It's been a long time since I've posted here.
>
> Anyway, what eyepiece would you recommend for use in a 16" f/4.5 dob? I'm
> considering this list, but I'd rather not spend the $300 a Pan 35mm will
> cost me.
>
> Antares Erfles (but which one?)
> Vixen LVW 42mm (has to be 2nd-hand to meet my price point)
> Stratus 30mm
> Stratus 35mm
> Meade QX 30mm
> Meade QX 36mm
> TMB Paragon 40mm (a stretch at $249)
> SWAN ??
> UWAN ?? (too costly)
> Televue Panoptic 35mm (again, too costly I think)
>
> I'd like to have decent stars to nearly the edge, where I'm mostly affected
> by coma inherent in my mirror. Perhaps at that point I'd buy a coma
> corrector to go with this eyepiece.
>
> Thanks for your opinions.
I have a 32mm TV plossl that works great in my f4.5 15" Not a wide
apparent field of view like a Nagler, but a lot less expensive. Some
coma near the edge, but a very enjoyable view.
Shawn
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Date: 07 Dec 2006 04:17:32
From: Sam Wormley
Subject: Re: Best widefield eyepiece for 16" f/4.5 dob???
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John McVey wrote:
> Hi all,
>
> It's been a long time since I've posted here.
>
> Anyway, what eyepiece would you recommend for use in a 16" f/4.5 dob? I'm
> considering this list, but I'd rather not spend the $300 a Pan 35mm will
> cost me.
>
> Antares Erfles (but which one?)
> Vixen LVW 42mm (has to be 2nd-hand to meet my price point)
> Stratus 30mm
> Stratus 35mm
> Meade QX 30mm
> Meade QX 36mm
> TMB Paragon 40mm (a stretch at $249)
> SWAN ??
> UWAN ?? (too costly)
> Televue Panoptic 35mm (again, too costly I think)
>
> I'd like to have decent stars to nearly the edge, where I'm mostly affected
> by coma inherent in my mirror. Perhaps at that point I'd buy a coma
> corrector to go with this eyepiece.
>
> Thanks for your opinions.
>
> John
>
Hi John--Some years ago I was going to get you the pin length
(that communicated maximum aperture to Canon cameras) on FD mount
lenses. My apologies for not getting that data to you. I have
since converted to EF lenses.
As far as the eyepiece, I would go with the Televue Panoptic 35mm.
-Sam Wormley
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Date: 07 Dec 2006 04:44:21
From: Drunken Jay Walker
Subject: Re: Best widefield eyepiece for 16" f/4.5 dob???
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"Sam Wormley" <swormley1@mchsi.com > wrote in message
news:wBMdh.306558$1i1.98699@attbi_s72...
> John McVey wrote:
>> Hi all,
>>
>> It's been a long time since I've posted here.
>>
>> Anyway, what eyepiece would you recommend for use in a 16" f/4.5 dob?
>> I'm considering this list, but I'd rather not spend the $300 a Pan 35mm
>> will cost me.
>>
>> Antares Erfles (but which one?)
>> Vixen LVW 42mm (has to be 2nd-hand to meet my price point)
>> Stratus 30mm
>> Stratus 35mm
>> Meade QX 30mm
>> Meade QX 36mm
>> TMB Paragon 40mm (a stretch at $249)
>> SWAN ??
>> UWAN ?? (too costly)
>> Televue Panoptic 35mm (again, too costly I think)
>>
>> I'd like to have decent stars to nearly the edge, where I'm mostly
>> affected by coma inherent in my mirror. Perhaps at that point I'd buy a
>> coma corrector to go with this eyepiece.
>>
>> Thanks for your opinions.
>>
>> John
>>
>
> As far as the eyepiece, I would go with the Televue Panoptic 35mm.
>
> -Sam Wormley
Can't you read?? The guy doesn't want a costly hand grenade to stuff his
dob with.
Anyway..these questions are usually pointless with soooo much on the market.
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Date: 07 Dec 2006 08:02:44
From:
Subject: Re: Best widefield eyepiece for 16" f/4.5 dob???
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John McVey wrote:
> Hi all,
>
> It's been a long time since I've posted here.
>
> Anyway, what eyepiece would you recommend for use in a 16" f/4.5 dob?
I woud recommend a 31mm Nagler (which is considerably above your price
point)
Failing a 31mm Nagler, I would recommend a 26mm Nagler, a 22mm Nagler
or a 20mm Nagler.
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Date: 08 Dec 2006 13:10:06
From: Llanzlan Klazmon the 15th
Subject: Re: Best widefield eyepiece for 16" f/4.5 dob???
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MitchAlsup@aol.com wrote in news:1165507363.354602.325620@
73g2000cwn.googlegroups.com:
>
> John McVey wrote:
>> Hi all,
>>
>> It's been a long time since I've posted here.
>>
>> Anyway, what eyepiece would you recommend for use in a 16" f/4.5 dob?
>
> I woud recommend a 31mm Nagler (which is considerably above your price
> point)
> Failing a 31mm Nagler, I would recommend a 26mm Nagler, a 22mm Nagler
> or a 20mm Nagler.
>
>
The problem with these wide field eyepieces is that his scope is at f4.5
which will have significant coma. He would ideally use a coma corrector
which of course adds to the expense.
Klamzon.
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Date: 07 Dec 2006 22:37:09
From: AstroApp
Subject: Re: Best widefield eyepiece for 16" f/4.5 dob???
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On Thu, 07 Dec 2006 04:08:41 -0000, John McVey <Askme > wrote:
>Hi all,
>
>It's been a long time since I've posted here.
>
>Anyway, what eyepiece would you recommend for use in a 16" f/4.5 dob? I'm
>considering this list, but I'd rather not spend the $300 a Pan 35mm will
>cost me.
>Stratus 30mm
>Stratus 35mm
Yesterday at the Orion store in Cupertino, manager Ken Sablinsky
informed me that BOTH of these are currently unavailable...but they
will bring out a slightly different replacement in a while.
>I'd like to have decent stars to nearly the edge
If my Stratus 21 can be compared, in a scope that is f/4.7, you will
NOT get clean star images to the edge. In that reflector, the stars
are clean only in the center of the field, across perhaps a bit less
than half the total diameter. At the edges they are pretty bad.
But the same Stratus 21 looks fabulous in my f/10 C-11.
So the eyepiece is not by any means an equivalent to a Nagler.
Otherwise the 21 is wonderful and I use it with greatest pleasure,
even in the f/4.7 scope. It seems to have, considering the large
number of elements, very little loss of light. Eye relief is good.
It's very well made. The filter threads are much better than the ones
in any of my other Orion eyepieces. I am sorry that I did not snap up
a 30 when it was available.
AstroApp
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Date: 08 Dec 2006 22:30:14
From: John McVey
Subject: Re: Best widefield eyepiece for 16" f/4.5 dob???
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Thanks to all for their replies (and good to hear from you Sam). Certainly
the Panoptic or Nagler type must be worth the investment and I am
considering it.
As for the Stratus, I have a similar 21mm Hyperion that is excellent in my
16" f/4.5. I don't find coma much of an issue with it.
I also have a 40mm Vixen 2" orthoscopic that provides adequate star images
with across it's 32mm field stop. I don't find coma objectionable with
this eyepiece either and that may be partially based on the low power (~
40X). I see two issues with using the 40mm ortho: narrow AFOV and too
large an exit pupil (10mm!). Hence my search for a better eyepiece.
Anybody happy with the Celestron Axiom 40mm in a fast dob? I recently saw
one of those on Astromart for a decent price.
John
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Date: 08 Dec 2006 15:09:34
From: Don't Be Evil
Subject: Re: Best widefield eyepiece for 16" f/4.5 dob???
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John McVey wrote:
> Thanks to all for their replies (and good to hear from you Sam). Certainly
> the Panoptic or Nagler type must be worth the investment and I am
> considering it.
>
> As for the Stratus, I have a similar 21mm Hyperion that is excellent in my
> 16" f/4.5. I don't find coma much of an issue with it.
>
> I also have a 40mm Vixen 2" orthoscopic that provides adequate star images
> with across it's 32mm field stop. I don't find coma objectionable with
> this eyepiece either and that may be partially based on the low power (~
> 40X). I see two issues with using the 40mm ortho: narrow AFOV and too
> large an exit pupil (10mm!). Hence my search for a better eyepiece.
>
> Anybody happy with the Celestron Axiom 40mm in a fast dob? I recently saw
> one of those on Astromart for a decent price.
>
> John
I ended up with a Meade Series 5000 32mm plossl. This is a 60 degree
design, so is much wider than normal plossl's. I have no issues with
coma, though my scope if f/6. No Nagler or Panoptic, but very very
nice for the price ($149). 20mm eye relief.
Greg
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