Re: [M]: Focusing ETX w/201X
| Subject: | Re: [M]: Focusing ETX w/201X |
| From: | Paul E. Snapp |
| Date: | Sun Sep 21 09:59:49 1997 |
Don,
I did not swap out the 201 and the eyepiece in the straight through
position. The ETX does not come with any of the appropriate adapters to
mount an eyepiece in this position. Meade makes a 45 degree adapter for
this purpose and is supposed to come standard with the spotting scope
version of the ETX. Since I just go mine and it is an astronomical
version I did not have this option to try. I also did not use the
extension on the #64 T Adapter and do not know if this would help solve
but will give it a try. I did try a 12.4mm non reticle eyepiece in the
90 degree position and it can be withdrawn slightly to obtain parfocal
focus with the 201. Ill let you know if I get any other hints that
work.
Don Dillinger wrote:
> Paul wrote,
> >> What do I need to do to get a centered, parfocal eyepiece so that
> I can
> >> quickly center and focus a star image on the 201XT mounted to the
> ETX? I
> >> appreciate any tips or findings from your experiences.
>
> The answer to this is of keen interest to me as well! I just ordered
> an ETX
> and rings, due to off-axis guider fatigue, and will be using the 201
> and 9mm
> in the same manner as Paul is hoping to. Paul, did you try swapping
> the 201
> for the 9mm in the straight through position? I realize this is not a
>
> solution, but Im curious how it worked, and at least you could do
> some
> imaging. Trying another eyepiece at the right angle adapter, and
> moving the
> 201 outward in the straight-through adapter tube and refocusing, are
> other
> things that I would try...
>
> With great interest,
> Cordially,
>
> Don Dillinger
> Snohomish Hilltop Observatory
> Snohomish, WA
> CCD images at
I did not swap out the 201 and the eyepiece in the straight through
position. The ETX does not come with any of the appropriate adapters to
mount an eyepiece in this position. Meade makes a 45 degree adapter for
this purpose and is supposed to come standard with the spotting scope
version of the ETX. Since I just go mine and it is an astronomical
version I did not have this option to try. I also did not use the
extension on the #64 T Adapter and do not know if this would help solve
but will give it a try. I did try a 12.4mm non reticle eyepiece in the
90 degree position and it can be withdrawn slightly to obtain parfocal
focus with the 201. Ill let you know if I get any other hints that
work.
Don Dillinger wrote:
> Paul wrote,
> >> What do I need to do to get a centered, parfocal eyepiece so that
> I can
> >> quickly center and focus a star image on the 201XT mounted to the
> ETX? I
> >> appreciate any tips or findings from your experiences.
>
> The answer to this is of keen interest to me as well! I just ordered
> an ETX
> and rings, due to off-axis guider fatigue, and will be using the 201
> and 9mm
> in the same manner as Paul is hoping to. Paul, did you try swapping
> the 201
> for the 9mm in the straight through position? I realize this is not a
>
> solution, but Im curious how it worked, and at least you could do
> some
> imaging. Trying another eyepiece at the right angle adapter, and
> moving the
> 201 outward in the straight-through adapter tube and refocusing, are
> other
> things that I would try...
>
> With great interest,
> Cordially,
>
> Don Dillinger
> Snohomish Hilltop Observatory
> Snohomish, WA
> CCD images at
