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needs diagonal?



 
 
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  #1  
Old December 23rd 03, 08:46 PM
Ioannis
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Default needs diagonal?

The following strange thing occurs with my Tasco 60/700mm: It came
originally with a crappy diagonal and two EP's. If I use the diagonal, the
EP's focus correctly, namely the rack and pinion can accomodate the EP's
ONLY in the presence of the diagonal. If I try to focus without the
diagonal, the rack and pinion comes out short for the two EP's which are
12.5 and 6mm.

One month ago I ordered two new 1.25" EP's, 25mm and 6mm along with a Baader
0.965"to 1.25" converter, but I had no way to check if the extra space
provided by the Baader will give enough slack for the rack and pinion to
accomodate the new EP's.

Does anyone have a guess on whether this is so? I am asking so that I can
start looking for alternatives, like tube extenders, before the EP's arrive.

Thanks much in advance,
--
Ioannis Galidakis
http://users.forthnet.gr/ath/jgal/
------------------------------------------
Eventually, _everything_ is understandable

  #2  
Old December 23rd 03, 11:36 PM
Jon Isaacs
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Default needs diagonal?

Does anyone have a guess on whether this is so? I am asking so that I can
start looking for alternatives, like tube extenders, before the EP's arrive.


Sorry I cannot help you on this, only suggest that you consider a hybrid
diagonal which will fit the 0.965inch focus but uses 1.25 inch eyepieces.

Observing though a refractor without a diagonal can be quite awkward,
especially towards the zenith where the best views are normally found.

jon
  #3  
Old December 23rd 03, 11:36 PM
Jon Isaacs
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Posts: n/a
Default needs diagonal?

Does anyone have a guess on whether this is so? I am asking so that I can
start looking for alternatives, like tube extenders, before the EP's arrive.


Sorry I cannot help you on this, only suggest that you consider a hybrid
diagonal which will fit the 0.965inch focus but uses 1.25 inch eyepieces.

Observing though a refractor without a diagonal can be quite awkward,
especially towards the zenith where the best views are normally found.

jon
  #4  
Old December 24th 03, 03:17 AM
Craig B
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Default needs diagonal?


"Ioannis" wrote in message
...
The following strange thing occurs with my Tasco 60/700mm: It came
originally with a crappy diagonal and two EP's. If I use the diagonal, the
EP's focus correctly, namely the rack and pinion can accomodate the EP's
ONLY in the presence of the diagonal. If I try to focus without the
diagonal, the rack and pinion comes out short for the two EP's which are
12.5 and 6mm.

One month ago I ordered two new 1.25" EP's, 25mm and 6mm along with a

Baader
0.965"to 1.25" converter, but I had no way to check if the extra space
provided by the Baader will give enough slack for the rack and pinion to
accomodate the new EP's.

Does anyone have a guess on whether this is so? I am asking so that I can
start looking for alternatives, like tube extenders, before the EP's

arrive.

Thanks much in advance,
--
Ioannis Galidakis
http://users.forthnet.gr/ath/jgal/
------------------------------------------
Eventually, _everything_ is understandable


Here's my experience with a crappy Bushnell 60mm/ 600mm FL .
I bought a .965 to 1.25 hybrid diagonal and some 1.25 EP's , I did not have
enough _infocus_ , so I had to cut off 30mm of the OTA with a dremel tool .
It worked fine after that :-) ..... then rebuilding the tripod ........


--
Craig
Montreal, Quebec
Canada
45.29 N 73.41W


  #5  
Old December 24th 03, 03:17 AM
Craig B
external usenet poster
 
Posts: n/a
Default needs diagonal?


"Ioannis" wrote in message
...
The following strange thing occurs with my Tasco 60/700mm: It came
originally with a crappy diagonal and two EP's. If I use the diagonal, the
EP's focus correctly, namely the rack and pinion can accomodate the EP's
ONLY in the presence of the diagonal. If I try to focus without the
diagonal, the rack and pinion comes out short for the two EP's which are
12.5 and 6mm.

One month ago I ordered two new 1.25" EP's, 25mm and 6mm along with a

Baader
0.965"to 1.25" converter, but I had no way to check if the extra space
provided by the Baader will give enough slack for the rack and pinion to
accomodate the new EP's.

Does anyone have a guess on whether this is so? I am asking so that I can
start looking for alternatives, like tube extenders, before the EP's

arrive.

Thanks much in advance,
--
Ioannis Galidakis
http://users.forthnet.gr/ath/jgal/
------------------------------------------
Eventually, _everything_ is understandable


Here's my experience with a crappy Bushnell 60mm/ 600mm FL .
I bought a .965 to 1.25 hybrid diagonal and some 1.25 EP's , I did not have
enough _infocus_ , so I had to cut off 30mm of the OTA with a dremel tool .
It worked fine after that :-) ..... then rebuilding the tripod ........


--
Craig
Montreal, Quebec
Canada
45.29 N 73.41W


  #6  
Old December 24th 03, 04:56 AM
Jerome Bigge
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Posts: n/a
Default needs diagonal?

On Tue, 23 Dec 2003 22:46:22 +0200, "Ioannis" wrote:

The following strange thing occurs with my Tasco 60/700mm: It came
originally with a crappy diagonal and two EP's. If I use the diagonal, the
EP's focus correctly, namely the rack and pinion can accomodate the EP's
ONLY in the presence of the diagonal. If I try to focus without the
diagonal, the rack and pinion comes out short for the two EP's which are
12.5 and 6mm.

One month ago I ordered two new 1.25" EP's, 25mm and 6mm along with a Baader
0.965"to 1.25" converter, but I had no way to check if the extra space
provided by the Baader will give enough slack for the rack and pinion to
accomodate the new EP's.

Does anyone have a guess on whether this is so? I am asking so that I can
start looking for alternatives, like tube extenders, before the EP's arrive.

Thanks much in advance,


Shouldn't make that much difference. I'm using an Orion
hybrid diagonal (1.25"-.965") on a Meade 220 which had
the smaller diagonal as "standard". The only problem
you might run into is with eye pieces that have the focal
point far up inside the eye piece themselves. These do
require more "in focus" than usual, and sometimes you
can run into a bit of trouble getting these to focus "in"
far enough to reach infinity. I'm assuming here that the
Baader .965" to 1.25" is a diagonal, not just a "converter"
that allows the use of 1.25" eyepieces in a .965 diagonal.
These most likely won't work unless you have a lot of
"in focus" built into your telescope.

Jerome Bigge
Member, Muskegon Astronomical Society
Author of the "Warlady" & "Wartime" series.
Download at "http://members.tripod.com/~jbigge"
  #7  
Old December 24th 03, 04:56 AM
Jerome Bigge
external usenet poster
 
Posts: n/a
Default needs diagonal?

On Tue, 23 Dec 2003 22:46:22 +0200, "Ioannis" wrote:

The following strange thing occurs with my Tasco 60/700mm: It came
originally with a crappy diagonal and two EP's. If I use the diagonal, the
EP's focus correctly, namely the rack and pinion can accomodate the EP's
ONLY in the presence of the diagonal. If I try to focus without the
diagonal, the rack and pinion comes out short for the two EP's which are
12.5 and 6mm.

One month ago I ordered two new 1.25" EP's, 25mm and 6mm along with a Baader
0.965"to 1.25" converter, but I had no way to check if the extra space
provided by the Baader will give enough slack for the rack and pinion to
accomodate the new EP's.

Does anyone have a guess on whether this is so? I am asking so that I can
start looking for alternatives, like tube extenders, before the EP's arrive.

Thanks much in advance,


Shouldn't make that much difference. I'm using an Orion
hybrid diagonal (1.25"-.965") on a Meade 220 which had
the smaller diagonal as "standard". The only problem
you might run into is with eye pieces that have the focal
point far up inside the eye piece themselves. These do
require more "in focus" than usual, and sometimes you
can run into a bit of trouble getting these to focus "in"
far enough to reach infinity. I'm assuming here that the
Baader .965" to 1.25" is a diagonal, not just a "converter"
that allows the use of 1.25" eyepieces in a .965 diagonal.
These most likely won't work unless you have a lot of
"in focus" built into your telescope.

Jerome Bigge
Member, Muskegon Astronomical Society
Author of the "Warlady" & "Wartime" series.
Download at "http://members.tripod.com/~jbigge"
 




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