Barlow ?

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Date: 08 Sep 2006 13:26:04
From: Terry A Haimann
Subject: Barlow ?

For a 20cm sct, what would be a good barlow for splitting binaries? It
would need to balance performance with economy, I can NOT afford a TeleVue.

Terry

Date:
From:
Subject:

Date: 08 Sep 2006 10:09:24
From: AM
Subject: Re: Barlow ?

Terry A Haimann wrote:
> For a 20cm sct, what would be a good barlow for splitting binaries? It
> would need to balance performance with economy, I can NOT afford a TeleVue.
>
> Terry

I am very happy with my Celestron Ultima Barlow (1.25")

Around $80 or so new most places

--
AM

http://sctuser.home.comcast.net

CentOS 4.3 KDE 3.3

Date: 08 Sep 2006 07:02:18
From: RMOLLISE
Subject: Re: Barlow ?

Terry A Haimann wrote:
> For a 20cm sct, what would be a good barlow for splitting binaries? It
> would need to balance performance with economy, I can NOT afford a TeleVue.
>
> Terry

Hi Terry:

If you need to watch the bucks, you could do much worse than the Orion
Shorty Barlow. Optically it's very close to _anything_ on the market.

<http://www.telescope.com/shopping/product/detailmain.jsp?itemID=253&itemType=PRODUCT&iMainCat=6&iSubCat=25&iProductID=253 >

Peace,
Rod Mollise
Author of:
Choosing and Using a Schmidt Cassegrain Telescope
and
The Urban Astronomer's Guide
<http://skywatch.brainiac.com/astroland >

Date: 09 Sep 2006 23:30:02
From: Terry A Haimann
Subject: Re: Barlow ?

Thx for the info, I went ahead and ordered one.

Terry

On Fri, 08 Sep 2006 07:02:18 -0700, RMOLLISE wrote:

>
> Terry A Haimann wrote:
>> For a 20cm sct, what would be a good barlow for splitting binaries? It
>> would need to balance performance with economy, I can NOT afford a TeleVue.
>>
>> Terry
>
> Hi Terry:
>
> If you need to watch the bucks, you could do much worse than the Orion
> Shorty Barlow. Optically it's very close to _anything_ on the market.
>
> <http://www.telescope.com/shopping/product/detailmain.jsp?itemID=253&itemType=PRODUCT&iMainCat=6&iSubCat=25&iProductID=253>
>
> Peace,
> Rod Mollise
> Author of:
> Choosing and Using a Schmidt Cassegrain Telescope
> and
> The Urban Astronomer's Guide
> <http://skywatch.brainiac.com/astroland>

Date: 09 Sep 2006 00:13:11
From: Thomas Mickle
Subject: Re: Barlow ?

"Terry A Haimann" <terry@Pegasus.oldboy > wrote in message
news:pan.2006.09.08.13.21.39.595031@Pegasus.oldboy...
> For a 20cm sct, what would be a good barlow for splitting binaries? It
> would need to balance performance with economy, I can NOT afford a
> TeleVue.
>
> Terry

Consider the Antares line. Made in Japan.

Date: 08 Sep 2006 20:54:40
From: Richard Adams
Subject: Re: Barlow ?

Thomas Mickle wrote:

> "Terry A Haimann" <terry@Pegasus.oldboy> wrote in message
> news:pan.2006.09.08.13.21.39.595031@Pegasus.oldboy...
>
>>For a 20cm sct, what would be a good barlow for splitting binaries? It
>>would need to balance performance with economy, I can NOT afford a
>>TeleVue.
>>
>>Terry
>
>
> Consider the Antares line. Made in Japan.
>
>

Just receive my TV Powermate. Made in Japan.

Date: 09 Sep 2006 05:03:28
From: Thomas Mickle
Subject: Re: Barlow ?

"Richard Adams" <ackthpt@concentric.net > wrote in message
news:edt3cg$efu@dispatch.concentric.net...
> Thomas Mickle wrote:
>
>> "Terry A Haimann" <terry@Pegasus.oldboy> wrote in message
>> news:pan.2006.09.08.13.21.39.595031@Pegasus.oldboy...
>>
>> Consider the Antares line. Made in Japan.
>
. Made in Japan.

I rest my case.

Date: 08 Sep 2006 13:19:43
From: RMOLLISE
Subject: Re: Barlow ?

Shawn Curry wrote:
> Terry A Haimann wrote:
> > For a 20cm sct, what would be a good barlow for splitting binaries? It
> > would need to balance performance with economy, I can NOT afford a TeleVue.
>
> I'm curious about Orion's new "apo" barlows:
>
> http://tinyurl.com/zr7qd
>
>
> Shawn

Hi:

I suspect this is the latest thing from China--several vendors appear
to be selling 2x and 3x import APO barlows at the moment. I picked up
one of these "APOs" from Owl Services at a star party recently--I
needed a new 3x and the price was right. Based on the limited amount of
use I've been able to give it due to the weather, it works well, though
I don't know that it's significantly better than the last crop of
Chinese barlows, which worked pretty derned well too.

Frankly, except for imaging, I don't use a barlow per se anymore. For
visual use, I almost always use the Denkmeier Power Switch now.

Peace,
Rod Mollise
Author of:
Choosing and Using a Schmidt Cassegrain Telescope
and
The Urban Astronomer's Guide
<http://skywatch.brainiac.com/astroland >

Date: 08 Sep 2006 19:37:48
From: Shawn Curry
Subject: Re: Barlow ?

RMOLLISE wrote:
> Shawn Curry wrote:
>
>>Terry A Haimann wrote:
>>
>>>For a 20cm sct, what would be a good barlow for splitting binaries? It
>>>would need to balance performance with economy, I can NOT afford a TeleVue.
>>
>>I'm curious about Orion's new "apo" barlows:
>>
>>http://tinyurl.com/zr7qd
>>
>>
>>Shawn
>
>
> Hi:
>
> I suspect this is the latest thing from China--several vendors appear
> to be selling 2x and 3x import APO barlows at the moment. I picked up
> one of these "APOs" from Owl Services at a star party recently--I
> needed a new 3x and the price was right. Based on the limited amount of
> use I've been able to give it due to the weather, it works well, though
> I don't know that it's significantly better than the last crop of
> Chinese barlows, which worked pretty derned well too.
>
> Frankly, except for imaging, I don't use a barlow per se anymore. For
> visual use, I almost always use the Denkmeier Power Switch now.

The Orion's are Japanese. I was surprised. Here's the text from the
web page:

Ultrascopic™ 2x 3-Element Barlow, 1.25"
With 27mm of clear aperture, this “long” barlow (5-5/8") from Japan will
please even the most demanding observer. Fits 1.25" focusers or diagonals.

They say the "Shorty" is also from Japan.

Shawn

Date: 08 Sep 2006 13:46:30
From: William Hamblen
Subject: Re: Barlow ?

On 2006-09-08, Terry A Haimann <terry@Pegasus.oldboy > wrote:

> For a 20cm sct, what would be a good barlow for splitting binaries? It
> would need to balance performance with economy, I can NOT afford a TeleVue.

Most barlow lenses are OK. I'd avoid the variable ones, though.
The only bad barlows are the cheap ones that come with
department store telescopes. I do have an old Edmund barlow
(not the Dakin) that wasn't much good.

Bud

Date: 09 Sep 2006 05:15:05
From: David Nakamoto
Subject: Re: Barlow ?

Terry A Haimann wrote:
> For a 20cm sct, what would be a good barlow for splitting binaries? It
> would need to balance performance with economy, I can NOT afford a TeleVue.
>
> Terry
One thing I like about the short tubed barlows, which is why I got one,
is that if you put it in the optical train with just itself and the
eyepiece, you get 2x, but if you put a star diagonal between the Barlow
and the eyepiece you get 3x. This little trick also works with imagers
and film.

--- Dave

Date: 09 Sep 2006 18:57:46
From: Thomas Mickle
Subject: Re: Barlow ?