Paracorr & Barlow fit question

The TeleVue web site recommends that a 2" barlow not be insterted into a
Paracorr, as it may contact and scratch the topmost element. I assume
this advice is directed to owners of the Big Barlow. This begs the
question: How much distance is there from the top flange of a Paracorr
(with the tunable top all the way down) to the top lens element?

I've just ordered an Antares 2" 1.6X, which Antares efers to as a "2"
shorty Barlow", and I was wondering if it might fit into a Visual Paracorr
without fear of hitting the top lens element. I don't have a Paracorr
yet, and I haven't taken delivery of the 2" Antares barlow yet, so I can't
offer any barlow measurements.

Lawrence Sayre
--
---------------------------------------------------------------------------------
My philosophy, in essence, is the concept of man as
a moral being, with his own happiness as the moral
purpose of his life, with productive achievement as
his noblest activity, and reason as his only absolute.

Ayn Rand (in the appendix to 'Atlas Shrugged')
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"Lawrence Sayre" wrote in message
newspr86gvjj7s5tvhu@sayre...
How much distance is there from the top flange of a Paracorr
(with the tunable top all the way down) to the top lens element?

I measure 45mm (that's with the 1.25" adapter removed).

-Stephen Paul

On Sun, 6 Jun 2004 15:32:06 -0400, Stephen Paul
wrote:


"Lawrence Sayre" wrote in message
newspr86gvjj7s5tvhu@sayre...
How much distance is there from the top flange of a Paracorr
(with the tunable top all the way down) to the top lens element?

I measure 45mm (that's with the 1.25" adapter removed).

-Stephen Paul



Thanks Stephen, this is exactly what I needed to know!!!

Lawrence Sayre
--
---------------------------------------------------------------------------------
My philosophy, in essence, is the concept of man as
a moral being, with his own happiness as the moral
purpose of his life, with productive achievement as
his noblest activity, and reason as his only absolute.

Ayn Rand (in the appendix to 'Atlas Shrugged')
-------------------------------------------------------------------------------

"Lawrence Sayre" wrote in message
newspr86ucfous5tvhu@sayre...

I measure 45mm (that's with the 1.25" adapter removed).

-Stephen Paul

Thanks Stephen, this is exactly what I needed to know!!!

I only measured at the center of the lens. Not sure if there is less
distance at the edge. I'll try to check that out when I get home tonight.

--
-Stephen Paul

On Mon, 7 Jun 2004 10:19:19 -0400, Stephen Paul
wrote:

"Lawrence Sayre" wrote in message
newspr86ucfous5tvhu@sayre...

I measure 45mm (that's with the 1.25" adapter removed).

-Stephen Paul

Thanks Stephen, this is exactly what I needed to know!!!

I only measured at the center of the lens. Not sure if there is less
distance at the edge. I'll try to check that out when I get home tonight.


I just got the Antares Shorty 2" barlow, and the shoulder to tip
masurement for the field end is exactly 40mm, so if the depth holds at
45mm, this is a go for safe insert, and will also be my que to go ahead
and get a Visual Paracorr. Is yours the Visual only unit?

Lawrence Sayre
--
---------------------------------------------------------------------------------
My philosophy, in essence, is the concept of man as
a moral being, with his own happiness as the moral
purpose of his life, with productive achievement as
his noblest activity, and reason as his only absolute.

Ayn Rand (in the appendix to 'Atlas Shrugged')
-------------------------------------------------------------------------------

"Lawrence Sayre" wrote in message
newspr88z4muas5tvhu@sayre...

I just got the Antares Shorty 2" barlow, and the shoulder to tip
masurement for the field end is exactly 40mm, so if the depth holds at
45mm, this is a go for safe insert, and will also be my que to go ahead
and get a Visual Paracorr. Is yours the Visual only unit?

Yes. Visual only. Tunable Top. Most eyepieces use the second notch outward
which gives you more clearance. The lens element seems curved the other way
than what I was concerned about. That is, it appears to be higher in the
middle than at the edge.

I'd say you're good to go, but, well, you know Larry, in the end, you're on
your own. g

Good luck, I'm sure you'll be fine.